Any holly sniper 2 experts here

[liam]

I just put a sniper 2 on my truck and had an inline fuel pump but it didnt work very well because there was no where to properly mount it do i got the holley intank fuel pump and that worked very well and then the truck sat 2 weeks getting a new driveline and now it runs like crap again any ideas

 

[ChuckN]

I’ll tag @bluex here, we’ve talked about Snipers in the past.

 

[Broken85]

Holly snipers are awesome pieces of equipment, but they need to be tuned. Even the set up wizard does really set up anything. prime fuel, IAC, ASE; there is a laundry list. I actually used chatGPT to dial in my tune. It seems to be running well now.

There are a lot of videos on line that I watched first. I’ll look back and see if I have any numbers written down for you.

BTW, for the group ; mine is on a Blue Print “turn-key” motor. When I called BP because I didn’t like the tune, they told me they don’t actually tune anything, then just run the set up wizard and throw it on a Dino

 

[bluex]

Hard to say anything definite with basically no description of what its doing. How many miles have you actually driven it?

Basic things to check though are:

1. Check/verify fuel pressure
2. What is the AFR showing?
3. Recheck your IAC setting an make sure its between 2-10% at warm (over 160*) idle. Shoot for lower numbers with an automatic.
4. Clear learn table if you have/suspect a bad O2. SAVE A CURRENT COPY OF THE PROGRAM FIRST!

 

[bluex]

Also get out of your head that it does everything on its own. Download an read the tuning manual, download an use the software, watch some you tube videos. Its a carb that makes simple on the fly changes on its own yes but major stuff you have to do in the software now instead of changing jets, accelerator pumps and and idle jet screws.

These systems are great but you have to do the work to make it that way. This goes for snipers/terminators etc from holley, Fitech, Edelbrock, Aces et all. They only "tune" the base fuel table. The rest is up to you. I really really wish they would change the way the advertise these type systems. Its not a modern new car obd2 type thing where you can be 100% hands off. An even on modern car the only reason why they work without constant tinkering is years of r&d by the OEs.


Sorry this is a huge pet peeve of mine, people buy these units thinking they shouldn't have to do anything at all to it, ever programming wise, an that's just not the case. I'll get off my soapbox now....

 

[Craig Nedrow]

Also get out of your head that it does everything on its own. Download an read the tuning manual, download an use the software, watch some you tube videos. Its a carb that makes simple on the fly changes on its own yes but major stuff you have to do in the software now instead of changing jets, accelerator pumps and and idle jet screws.

These systems are great but you have to do the work to make it that way. This goes for snipers/terminators etc from holley, Fitech, Edelbrock, Aces et all. They only "tune" the base fuel table. The rest is up to you. I really really wish they would change the way the advertise these type systems. Its not a modern new car obd2 type thing where you can be 100% hands off. An even on modern car the only reason why they work without constant tinkering is years of r&d by the OEs.


Sorry this is a huge pet peeve of mine, people buy these units thinking they shouldn't have to do anything at all to it, ever programming wise, an that's just not the case. I'll get off my soapbox now....

I just learned a bunch from you, bluex, i like the soapbox.

 

[jcperformance]

Check your fuel pressure first, sounds like it might be dropping. Also make sure your filter isn’t clogged and recalibrate TPS/IAC. Could also be bad fuel after sitting.

 

[bluex]

Check your fuel pressure first, sounds like it might be dropping. Also make sure your filter isn’t clogged and recalibrate TPS/IAC. Could also be bad fuel after sitting.

Snipers recalibrate tps at every key on, you dont have to do an auto-set like a terminator.

Iac gets set at operating temp by the idle screw.