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Holley sniper poor fuel mileage

I have the ez efi 2.0 on my 96 Roadmaster wagon with a pretty healthy 455, I absolutely hate it , it will show 15.9 air/ fuel ratio and be loading up so bad your eyes water, And hardly ever starts without 30 seconds of cranking, backfiring, cranking. And I'm getting 5 mpg less than when I was running my 1000 Holley with 88 jets square.
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View Holley Sniper EFI Self-Tuning Kit - Shiny Finish. Bolt on 4150 Flange Carburetor Replacement. Throttle body mounted ECU - no extra boxes to mount. Supports up to 650hp with Four 100 Lb/Hr Injectors! All of the wiring exits below the rear fuel injector cover, for a completely stealth installation..

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The Sniper EFI tuning software offers the same types of controls as Holley 's HP and Dominator EFI systems, with boost control and advanced tuning capabilities as the most.
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Holley sniper fuel pump. Thread starter hapa23; Start date Oct 20, 2021; H. hapa23 Newbie. Joined Mar 13, 2016 Messages 22. Oct 20, 2021 ... so wire size ,,poor connections..poor splices?? I;d also check current draw while running either with a meter in line or with a current probe.
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Buy Throttle Body Shop ... inch, 350 HP (Car) = $3595. Additional cost for turnkey package = $1399 to $1699, depending upon your application, plus Holley Sniper fuel injection system. This includes first. Howell Fuel Injection Kit for 1972-1993 304, 360, 401 V-8 Jeep/AMC - available in 2 versions OFFROAD and EMISSIONS LEGAL OFFROAD. OFFROAD ....
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Search: Efi 24x Setup. Injector support chart provided in the instructions (Will not control Low Impedance Injectors) operate at speeds up to 2666 MHz x version nor UEFI 2 5-inch drive bays with an extensive choice..
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Adding the required external MAP sensor is going to boost the price of the Sniper by over $200 and you're half-way to a Terminator X. But if you're going to be between 525 and 1050 HP (gasoline) or up to about 750 HP (E-85) then go for the 8-injector Terminator X Stealth . Scenario 7: Serious Drag Racer.
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Everything looked very nice out of the box, even though Holley did cheapen up the packaging. I wanted to go with an in-tank fuel pump, so got one for an EFI car and did some modifying to it for the return line. Picked up a high pressure pump (Sniper requires 60.
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The Sniper line of products are bringing high-quality products into everyone's price range! Sniper is a one stop shop for a complete fuel system overhaul, including fabricated intake manifolds, high-performance plumbing parts, fuel pumps & regulators, and a self-tuning TBI-style fuel injection system that starts at $999!.
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View Holley Sniper EFI Self-Tuning Kit - Shiny Finish. Bolt on 4150 Flange Carburetor Replacement. Throttle body mounted ECU - no extra boxes to mount. Supports up to 650hp with Four 100 Lb/Hr Injectors! All of the wiring exits below the rear fuel injector cover, for a completely stealth installation..
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Holley Sniper 550-513 - Holley Sniper EFI 1250 HP Super Sniper Fuel Injection Systems Fuel Injection System, Holley Super Sniper 1250 HP, 4150 Flange, Self-Tuning, Black Throttle Body, Kit Part Number: SNE-550-513 Ultimately, I ordered everything from Holley and all in I'd say my total spend was around $2000 <b>Sniper</b> <b>EFI</b> is versatile Of course. Buy Holley 550510 Electronic Fuel Injection: ... I installed the Holley Sniper EFI and the Holley Sniper Fuel tank on my 1971 440 Cuda mainly to get rid of the gas smell from my car. The carb ran good but after driving the car you and the house smelled like an old gas station. ... No more cold start problems, no gas smell, better gas mileage. end of year preschool program 1 Sniper Stealth 4500 (550-841 Shiny, 550-842 Black, & 550-843 Gold) Holley Sniper EFI FUEL INJECTION INSTALLATION MANUAL. No problem, Holley also offers a 650 HP four injector version for lower horsepower applications with a power adder or someone just needing additional sensor inputs John Deere No 5 Sickle Mower For Sale It. Jan 07, 2019 · Discussion Starter · #1 · Jan 7, 2019. I recently finished the full install of the sniper EFI system, sniper fuel tank w/ internal fuel pump along with the hyperspark ignition and timing. Ultimately, I ordered everything from Holley and all in I'd say my total spend was around $2000. I also put in new plugs and wires.. "/>.

It needs to have an 80-100-micron pre-filter installed between the tank and the pump in addition to a 10-micron filter between the pump and throttle body. Avoid using any 90-degree.. Got the basic Sniper for my 68 340, with the OEM style fuel module sending unit/fuel pump from Holley. I have a "Ready to Run" distributor. Hit the key the fuel pump comes on like it should, shuts off after a few seconds, go to start and it won't fire up. sounds like not getting fuel..

A common issue we see is a result of poor fuel pump grounding running a eyelet from the pump ground to a rusty or painted surface. The resulting resistance can burn up fuel pumps, wiring and relays. Extending wires with too small of a wire gauge will also result in the same damage. #3 Engine Ground.

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When the truck was getting fed through the Quadrajet, my highway mileage was 10.5 to 11.0 miles per gallon. After installing the Sniper and running for a few weeks with the initial. Apr 03, 2018 · See all 15 photos The Holley Super Sniper's throttle body includes either four or eight 100 lb/hr fuel injectors that spray in an annular pattern down the 800cfm throttle bores. The unit features ....

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Hard starting, lagging acceleration, non-working secondaries, and poor gas mileage are all symptoms of a neglected carb. Carburetor rebuilding is a dying art, and the number of experts in the U.S. we trust to rebuild a Land Cruiser carb can be counted on one hand. ... The Howell TBI systems, and the Holley Sniper self-learning EFI systems. The.

  • Holley 550-510 Sniper EFI System Silver, $1019.95 (Available in Black or Gold for $1060.95) Holley 12-345 OE-Style Fuel Tank Pump Module 84 Mustang, $224.95 ESP FOXMODINSTKIT Install Component Kit for OE Module, $211.39 Earl's 100187ERL 100 PSI Mechanical Fuel Pressure Gauge, $35.05 Earl's AT100199ERL -6 AN Male-To-Female Gauge Port Adapter, $16.03. Found out from the holley efi forums that this is a common problem with the sniper and manual transmissions. ... 2.5 inch bds suspension lift, 1 inch polyurethan body mount lift. Holley sniper efi . factory tach. factory clock , herculiner. Yj tub . Garvin front and rear bumper tire carriers. Engine starts, then dies within a few seconds . this leads me to believe the sniper has a bad setup or internal problems. The sniper does not report fuel pressure. The IAC when it starts is at 100% which makes a loud sucking air sound and it settles down to 40% as the engine temp warms up, air noise goes away as well..

  • As you transfer and smooth those maps together the learning will decrease and your base fuel map will be close to what your car needs to run normal. Also, if you have a O2 sensor failure your base map is very close to what your engine needs and will run just fine after turning off close loop until you can make the repair. HTH Steve laser-red-nova. I drove my Sniper powered Wagoneer (AMC 360) the other day in some extreme (97°F +) heat and it got REALLY bad fuel mileage. I drove it about 40 miles on the highway,. A common failure mode is that the CTS reads high at low temperatures and low at higher temperatures. This can limit the ability of the system to stay in Learn mode as no Learning occurs when the CTS reads below 160°F. The basic Target AFR values are fairly rich, but try to stabilize the idle before making changes.

Is upgrading from your trusty Holley carburetor to fuel injection worth the trouble? Davin puts the Redline Rebuild Ford 289 on the engine dyno to find out i....

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Vacuum leaks are the number one cause of poor running engines when Using carb cleaner or unlit propane around potential leak areas will help you identify a Accelerator pump settings Once everything else feels right at steady state, then Too much fuel from the accelerator pumps is going to cause the excess fuel to With shipping it came to nearly $400 Holley Trick Kits are.

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  • To avoid poor gas mileage or trouble starting your car, replace a failing fuel pump with this Sniper Fuel Pump (80000101) and Regulator from Holley. The Fuel Pump flows at 110 gallons per hour, supporting your carbureted engine with the proper supply of gasoline. The component is equipped with 3/8" NPT inlets and outlets.

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2. RE Tuning: Yes the Sniper self learns and adjust fuel tables as you drive. I also had my mechanics tune it however their experience was limited. I ended up going with a recommendation from the Holley Forums to do remote tunes on my Sniper setup. He offers lifetime tunes at a very reasonable cost and does it all remotely.

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The only bad thing is it's imported from... I'm using an MS3X (Megasquirt) It has full sequential fuel and spark. The throttle body is an Ebay special. ... I've done one sniper and 2 Holley terminators all with zero failures and 5 yrs on the terminator systems. ... It might help fuel mileage some. Also from what I've read, (and I initially. Vacuum leaks are the number one cause of poor running engines when Using carb cleaner or unlit propane around potential leak areas will help you identify a Accelerator pump settings Once everything else feels right at steady state, then Too much fuel from the accelerator pumps is going to cause the excess fuel to With shipping it came to nearly $400 Holley Trick Kits are. I'm curious how the Sniper will do over the next few years. Keep in mind, this system will not cure any pre-existing issues with your engine- it will magnify them and drive you nuts (e.g. low compression, vacuum leaks). Parts used: Holley Sniper EFI Self-Tuning Fuel Injection Systems. 550-516. $1,039.95.

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Arguably the most attractive part about the Super Sniper is that for its sophistication and power-handling capability, it is among the most affordable and easy-to-use EFI systems out there. At a. Part Number: 510-20-120 Holley Fuel Pressure Regulator Brackets Black Anodized Billet Aluminum Fuel Pressure Regulator Brackets Black Anodized Billet Aluminum View Details $48.78 Estimated to ship direct from manufacturer on 06/01/22, pending manufacturer availability.

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Apr 09, 2019 · It needs to have an 80-100-micron pre-filter installed between the tank and the pump in addition to a 10-micron filter between the pump and throttle body. Avoid using any 90-degree fittings between the tank and pump. A tube type 90 is equal to adding 3 feet of fuel line between the tank and pump.. Oct 18, 2018. See all 2 photos. Holley /MSD is thrilled to announce the release of Sniper EFI Systems for Quadrajet applications, which eliminate the need to continually rebuild.. Holley Sniper Fabricated Manifolds continues to push the aftermarket by introducing Low Profile intakes for GM LS Engines. These Intakes are a good looking, perform well, and offer an extremely good value for a performance sheet metal style intake manifold for the very popular GM LS engine family...

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Aug 11, 2017 · This is why most OEM EFI pumps are in the tank. It needs to have a 80-100 micron pre-filter installed between the tank and the pump. And 10 micron filter between the pump and throttle body. Avoid using any 90 degree fittings between the tank and pump.. Sep 15, 2022 · With the Holley single-pump carburetor, the 289 puts out 282 horsepower and 313 lb-ft of torque. Not a bad starting point. So the Holley carb set atop of the engine is a good match for the upgrades Davin added during our Redline Rebuild, but why leave well enough alone? The Holley Sniper EFI kit Davin installs in place of the carburetor ....

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  • Search: Efi 24x Setup. Injector support chart provided in the instructions (Will not control Low Impedance Injectors) operate at speeds up to 2666 MHz x version nor UEFI 2 5-inch drive bays with an extensive choice..

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  • Holley Sniper Fabricated Manifolds continues to push the aftermarket by introducing Low Profile intakes for GM LS Engines. These Intakes are a good looking, perform well, and offer an extremely good value for a performance sheet metal style intake manifold for the very popular GM LS engine family...

Mileage: 39,847: VIN: CKE242J154454: Color: Orange: Engine: SBC 383 Stroker Holley EFI Sniper Carb w/Wide Band ... WE TRADE UP OR DOWN - HAVE A CAR OR TRUCK OF GREATER VALUE WE CAN HELP, RATES AS LOW AS 2.49 OAC, GOOD OR BAD CREDIT WE CAN HELP www.LOT99LLC.com 503-305-8186 More Chevrolet classic cars for sale ... 1970 Chevelle 396 V8 Holley. How to Fix High fuel pressure with your Holley SniperAre you getting 70, 80 or 90+ PSI fuel pressure?This video shows the most common reason to have high fue.

1968-1981 Holley Sniper EFI Quadrajet Spread Bore Throttle Body Upgrade. ... Poor Performance or Gas Mileage: No power or bad gas mileage. 1) Clogged gas tank vent or fuel venting system. 1) Remove gas cap and see if performance improves. If so clean or replace the gas cap. Check the charcoal cannister, hoses to it and any check valves..

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Jul 27, 2015 · Every Holley has the potential to be a fuel miser, but achieving ultimate success means making a wise initial choice. A 600 vacuum secondary, such as this unit (PN 0-80457SA), was used on one of my Chevy 383 small-block budget builds with the intent of making torque and mileage the prime requirements.. I drove my Sniper powered Wagoneer (AMC 360) the other day in some extreme (97°F +) heat and it got REALLY bad fuel mileage. I drove it about 40 miles on the highway,. I'm still driving it, but it'll never be what it once was. So, I purchased a nice '85 Eddie Bauer Bronco with a fuel injected 302 in it. I plan on dropping the 300 into the '85 and fuel injecting it. Some quick overview specs of the engine: 19cc 351w pistons. Deck shaved to 0.005" in the hole. 9.1:1 compression. Next step is adding the timing control. The sniper came with a coil driver as a separate piece. 4-wires on the driver, 2 wires for the magnetic pickup, lock the mechanical advance, align the rotor to the cap. After that is running , the progressive kit..

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When the Holley Sniper EFI system was revealed at SEMA 2015, I knew I had to have it. Chevelle EFI Conversion (5)(3). ... EFI In-Tank Pump Fuel Tanks kits These conversion fuel tanks solve the problem of supplying your new LS engine with a steady flow of fuel. Part Number: H19550710. Nov 26, 2016 · ... GAS MILEAGE. Always a big. Aug 25, 2020 · cougar70. The regulator and fuel pump keep the fuel pressure regulated to 59.5 PSI under ALL conditions. It should not change. The engine doesn't even need to run to check fuel pressure. When the key is in the run position the fuel pump and regulator primes the system to 59.5 PSI even before the engine starts. The pulsing of fuel injectors at a .... Sep 15, 2022 · With the Holley single-pump carburetor, the 289 puts out 282 horsepower and 313 lb-ft of torque. Not a bad starting point. So the Holley carb set atop of the engine is a good match for the upgrades Davin added during our Redline Rebuild, but why leave well enough alone? The Holley Sniper EFI kit Davin installs in place of the carburetor .... 1. Our starting point is the original 283ci small-block in our 1964 Chevelle. We’ve already installed a new water pump, electronic ignition, Vintage Air A/C, and a Powermaster one-wire.

Plenty of power and torque for California Wheel'n, easy to swap (I've been told the tranny bolt patterns are the same on the 4.0L and 4.2L.) and fuel injected. It's amazing how much money you could dump into a 258. An engine rebuild with the Mopar MPI kit would cost around $4000. The 4.0L engine swap is the only option that really makes sense.

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Aug 25, 2020 · cougar70. The regulator and fuel pump keep the fuel pressure regulated to 59.5 PSI under ALL conditions. It should not change. The engine doesn't even need to run to check fuel pressure. When the key is in the run position the fuel pump and regulator primes the system to 59.5 PSI even before the engine starts. The pulsing of fuel injectors at a .... Before you purchase Sniper,go on Holley's website and look at the PDF for installation to see what the system needs to support it fuel wise. You can also check out some of the reviews for driveability complaints and see the common denominator with many aren't the system itself but fuel supply/vacuum leak issues.

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View Holley Sniper EFI Self-Tuning Kit - Shiny Finish. Bolt on 4150 Flange Carburetor Replacement. Throttle body mounted ECU - no extra boxes to mount. Supports up to 650hp with Four 100 Lb/Hr Injectors! All of the wiring exits below the rear fuel injector cover, for a completely stealth installation..

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I am new to this site . Can you tell which difference between before and after conversion to the Holley Sniper EFI you have, in fuel consumtion (mpg or l/100km), throttle Response and engine Power. I would like to do a conversion on my 65th Riviera too. You know any other guy, he goes with a modern Injection on a old nailhead like you. The Sniper line of products are bringing high-quality products into everyone's price range! Sniper is a one stop shop for a complete fuel system overhaul, including fabricated intake manifolds, high-performance plumbing parts, fuel pumps & regulators, and a self-tuning TBI-style fuel injection system that starts at $999!. Holley Sniper Fabricated Manifolds continues to push the aftermarket by introducing Low Profile intakes for GM LS Engines. These Intakes are a good looking, perform well, and offer an extremely good value for a performance sheet metal style intake manifold for the very popular GM LS engine family... The kit includes the tank, a 400 lph fuel pump, internal baffling, and a fuel level sender. The tank is powder coated for corrosion resistance and great looks. These tank kits are a complete solution for your EFI project! ... Holley Sniper EFI Fuel Tank, 400LPH pump, 1955-1956 Chevy (OS) Our Price: $628.95 . Our Price: $49.95.. Engine starts, then dies within a few seconds . this leads me to believe the sniper has a bad setup or internal problems. The sniper does not report fuel pressure. The IAC when it starts is at 100% which makes a loud sucking air sound and it settles down to 40% as the engine temp warms up, air noise goes away as well.. Arguably the most attractive part about the Super Sniper is that for its sophistication and power-handling capability, it is among the most affordable and easy-to-use EFI systems out there. At a.

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pubs with function rooms parramatta; bigil movie trans uterus meaning trans uterus meaning. The tech told me to increase the fuel prime level from 150 to 200. I did. Car started! Success! Not so fast. After about 5 minutes the car died. I called Holley. Explained what was going on & he seemed to think it was a loose connection somewhere in the rpm signal. I agree because when I turn the car over there is no RPM reading on the LCD screen.

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Re: Holley 4 Barrel, Carb Secondaries Not Opening. Your Roch was probably 450-500cfm, you're gonna gain very little. You will, however, gain fuel economy if you setup the secondaries to open above 3500rpm, that way you can plane up, and cruise all. A common failure mode is that the CTS reads high at low temperatures and low at higher temperatures. This can limit the ability of the system to stay in Learn mode as no Learning occurs when the CTS reads below 160°F. The basic Target AFR values are fairly rich, but try to stabilize the idle before making changes. Got the basic Sniper for my 68 340, with the OEM style fuel module sending unit/fuel pump from Holley. I have a "Ready to Run" distributor. Hit the key the fuel pump comes on like it should, shuts off after a few seconds, go to start and it won't fire up. sounds like not getting fuel.. Today I drive the 1986 chevy c10 to the mountains and back to test how bad the fuel economy is on my 383 stroker truck!Get your SQUAREBODY MERCH here: https:. I drove my Sniper powered Wagoneer (AMC 360) the other day in some extreme (97°F +) heat and it got REALLY bad fuel mileage. I drove it about 40 miles on the highway, and it drank up 10 gallons of fuel. It wasn't even that bad with the carb. I had a datalog running, but I accidentally turned the vehicle off before I closed the datalog out. Went into the range for about an hour. Came out and started the car, and noticed the O2 sensor reading, AFR, was steady climbing, and actually topped out at 35.6 Also, the CL COMP % was at 100, as was the CURRENT LEARN, also at 100... I did also notice the INJECTOR P/W was way high...like 11.6%, at just off idle, where it normally may be like 2%.

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Holley Sniper Fabricated Manifolds continues to push the aftermarket by introducing Low Profile intakes for GM LS Engines. These Intakes are a good looking, perform well, and offer an extremely good value for a performance sheet metal style intake manifold for the very popular GM LS engine family... The fuel lines and fittings are 3/8s with 8AN fittings and everything on the 60 requires 5/16 fuel line with 6AN fittings) Holley Sniper EFI 550-849 Holley Sniper EFI 2300 Self-Tuning Kit - Shiny. At 800 and 900 CFM for the Sniper / Super Sniper and XFlow (respectively), these throttle bodies can really be a handful at throttle tip-in. I was wondering if anyone here has seen the new Holley Sniper 2300 EFI 2bbl or that Fitech has also just released a new 2bbl version and both of these systems are very user friendly and both will run on a 4 cylinder engine...they both have only 4 wire connection to function. ..the only mods needed would be the fuel supply, connect the coolant temp to oil supply and weld in 02 bung for 02. The Sniper will never finish learning. Something as simple as weather, temperature, and elevation changes can dictate how much fuel an engine needs. Therefore, every time you drive, the Sniper will keep learning to get closer to your target Air/Fuel Ratio. It will rough in the base table in as little as 10 miles.. It needs to have an 80-100-micron pre-filter installed between the tank and the pump in addition to a 10-micron filter between the pump and throttle body. Avoid using any 90-degree..

If so, advance from ported (right side) of Sniper to the port diaphram port closest to the distributor. Try setting the idle to 750 (you will have to adjust the idle screw as well). Reset the wizard and see if that fixes it. If not, you may have ignition, fuel pressure, vacuum, or ? Issues. I hope this works as well for you as it did me.

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Holley Sniper 550-513 - Holley Sniper EFI 1250 HP Super Sniper Fuel Injection Systems Fuel Injection System, Holley Super Sniper 1250 HP, 4150 Flange, Self-Tuning, Black Throttle Body, Kit Part Number: SNE-550-513 Ultimately, I ordered everything from Holley and all in I'd say my total spend was around $2000 <b>Sniper</b> <b>EFI</b> is versatile Of course.