Holley Sniper EFI

Baker

Baker

Well-Known Member
Joined
Mar 25, 2010
Location
Suffolk, VA
Does anyone on here have any experience with the Holley Sniper EFI 4 barrel bolt on kit?

I installed the sniper on my AMC 360 bored .060 over making it roughly an 371 ci. I bought the master kit that has everything included. I'm running an HEI distributer with 15 degrees base timing and vacuum advance. I followed the instructions thoroughly. Upon initial start up it idles high around 1,000 rpm's so I adjusted the target idle speed to 750 rpm's on the handheld screen. The ECU learned the idle and its all good on that front. Now the kit has a wideband 02 sensor and asks for a target air fuel ratio of 13.5 - 15. I'm on the lower end of that scale at idle. When I drive the jeep I can only get up to around 2,000 rpm's and the motor acts like its very lean on fuel. the air fuel ratio jumps up to around 16 or 17, the engine looses power, it bucks real hard and the power comes back. It repeats this over and over unless I let off the throttle. I've spoken with Holley's tech service and cannot locate the problem. Any help is appreciated.
 
Subbed to learn.....

Positive no vacuum leaks or the like?
 
Tagging @71chevytruckguy in this thread. Chris uses this system and has it figured out.
'Dre out...
 
I had 2 small vacuum leaks but got them taken care of. The wideband 02 sensor is mounted passenger side just after the header collector at an angle like the instructions say. I just picked up a fuel pressure test kit tonight so that's on the agenda for tomorrow after work.
 
Have you driven it further than around the block? I read that you need to drive it for it to learn everything, I’ve nit set one up tho just been doing homework for when/if I get it!
 
I got the kit figured out. The issue was a combination of a bad fuel pump and not having a drip tube installed in my fuel cell for the return fuel. The jeep is running great now. I took it to uwharrie to test it and it performed awesome.
 
Was the hookup as easy as it looked? Did you go with the sniper dizzy also or just efi? I really want to go sniper but looks like propane’s gonna be my setup for time being!
 
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