Holley How To: Install Sniper EFI

Installation of our Sniper Fuel Injection system is one of the simplest ways to upgrade and replace your carburetor with modern technology. Sniper EFI is versatile. This means it will work on most any V8, V6, or similar traditional engine. Sniper EFI will work with many types of distributors and ignition systems, you can even put it on an LS engine! This video is intended to cover every step of converting your carbureted muscle car, classic truck, or hot rod to a modern electronic throttle body fuel injection system.

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[stevecleveland]

Seeing this video reminds me of a issue I had and think anyone thinking of in stalling a duel post battery should read till the end. I have a 1969 RS/SS that I installed a sniper on a year ago. The car ran right off and ran great. After a few weeks, I started to have issues with the system. Called Holley Tech and they gave me a few ideas of what could be my problem. The main issue I had was the car would just shut off. I checked all the wiring and installed ground straps everywhere Holley told me to. The car would still just shut off so I got tired of not having any trust in the sniper and pulled it off and put a Holley 750 double pumper on it. Car ran good and one day would not start. I checked the volts and had 13.5 but the car would stall. I checked all my wiring and all was good but still no go. Had a friend with over 35 experience come over and we put our heads together and checked the battery and all connections no go. We were checking the volts on the top post of the battery and had 13.5. We would get the car to start and run for 5 mins and stall. We started it up once more and when she stalled we checked the side post and only had 8 volts. After the car sat awhile we started it up and the side post would start out @ 13.5 but would drip very fast and @ 9 volts the car stalled. Went to a stereo shop and bought top post ends that have accessory connections and fixed my problem. I'm putting my sniper back on.

[mike_nagle]

I want to say that I installed the Master kit on my 1968 F100 pickup using this video. It was 100% helpful. Made me feel very confident to do this. I did have to use the trouble shooting video afterwards to ensure 100% perfect startup every time. But I am a completely satisfied customer who enjoyed and appreciated this video.
PS…My truck runs so much better now with the Sniper EFI kit as opposed to the 650 Carburetor that was on it.
Thank you Holley for creating this content for your customers!! 👍🏻

[dwightsenne]

Have been considering a Sniper for a few weeks now and this video answered all my questions about the install. Very well done, thank you!

[jimclarke]

Instant start, perfect idling, perfect fuel mixture in the full rev range

[kencs]

Just installed mine the fuel return threw the fuel filler was easy. Runs way better on the built 454 than the 750 edelbrock ever did. Worth it

[TandDw]

Thank you for posting such an informative video. I watched it twice before starting the install, read the instructions between and now watched it twice more as I'm working on the install. The instructions are very good, it's still helpful to see it done.

[michaelmcelroy]

While you installing the power wire to the fuel pump 11:42, install the nut you left off securing the rear axle to the spring! Good video awaiting my Hyperspark EFI Ignition box to complete the install.
Mike

[DadbrosGarage]

Simple, easy, straight to the point instructions. Definately making my choice for an EFI system easy

[crazyhorseDOC]

Best video out I've found on this style EFI install. Great informative install, direct to the point.

[kinikinrd]

Most important! Anti-seize on the stainless steel O2 sensor clamp screws.

[fbodyxgbodyx]

I know this is an old video but I just recently purchased this efi system and will be installing around the first of the year. I'm planning on recording the process and upload it when I'm done. Looks like a really good product.

[edwardpapp]

Well done. Nice to see fuel pump location options I’ll have to study this and your distributor replacement videos

[SoulofaSeeker]

We need to get one of these installed on our 360 in our old RV! Starting it on cold mornings is such a pain!

[jeremiahjohnson]

Got mine in today, planning on installing it this weekend. Hope it lives up to the hype. Install will be on a FE 390 engine, will be put on a BBF 429 when the build is done.

[GenV_Restomods]

One of the big advantages of this system compared to FiTech is you have a memory card in the handheld that allows you to save the tune. You can make modifications, upload the tune, try them out and decide whether or not you want to keep them. If not, you can simply load the old tune. It also has a very powerful learn table (short term fuel trim) that allows you to merge it with the main table and smooth out the rough edges. Really cool to see it in 3D, gives you a much better idea of what you're doing.
Additionally you can download the full suite of Terminator and run it full size on your laptop. I prefer that mode when we make a tuning run and can make changes along the way to test different options. We were running an LS3 with 4L65e and it defaulted to a WOT shift rpm at 6, 000 rpm. We didn't like that and knocked it back down to 5, 200 rpm for a better "normal' driving style. Lots of other options including full scanning options to pinpoint problem areas, great stuff priced fairly. Only thing I don't like is there is only one Wide Band O2 sensor, you have to upgrade to the full Dominator product to get two sensors.

[jaidenallen]

Do you have video installing the Holley sniper on a5.3 or 6.0 that was carburetor

[chevelle-pibn]

With the xflow, are you soppose to still run the other harnesses into the car if not using them ? I see there are no weatherproof caps for the connectors included. Also if the car already has an electric pump set up in the car do you still need to wire the fuel pump wire to the pump in that is on the harness?

[robmotorsport]

Hi guys, Does this system support E85? I recognise the need to flow more fuel when running it and the implications that would have for HP. The reason I ask is in regard to running E85 to meet emissions temporarily before switching back to normal pump fuel. Cheers!

[LUIS_PELON]

Man you make this look easy.
This will take me probably a week 😢

[hdrolling]

I've been trying to figure out were to place the water temp, forums all say on top of the intake before the thermostat. I have my heater hose there and a Dakota digital temp in the drivers head, glad to see the passenger side head will work fine. SBC 350