LS Backfiring issue - Lateral-g Forums

IndyNova · #1 03-08-2017, 09:48 AM

Old cam specs

Che70velle · #2 03-08-2017, 12:18 PM

Too much lifter preload. It can be off by a smidge, and cause this.

71RS/SS396 · #3 03-12-2017, 06:22 AM

If everything mechanical with the valvetrain checked out ok my first guess would be the cam pulse is missing from either the sensor being bad or the wiring has a problem but they will usually eventually start if this is the case if you keep cranking.

IndyNova · #4 03-14-2017, 08:32 AM

So I found the issue.. the wires were crossed in an coil extension harness I got to relocate the coils. I never thought to look there since it ran fine on initial setup.

Che70velle · #5 03-14-2017, 01:47 PM

Thanks for the follow up. All too often, threads like this die off with no explanations.

IndyNova · #6 03-14-2017, 02:33 PM

Yeah I was completely dumbfounded by it. I don't get how it ran for a minute and half, and then the next time I started it, it was popping and backfiring. Would've saved me hours if I'd have started there...lol