Thread: Running rich at idle, causing idle issues.

It seems as if it either misses or backfires massive spurt of KR (2-5*) then back to normal and does it again.

This is after I get between 3-5 lbs into it.

For those who dont know the car, its a top swap with headers.

The car doesnt seem to do this when pulling from first gear but then does it when pulling from second gear.

For the moment, I'm running 14* of timing till this is sorted out.

At first the car recorded actual misfires, regapped the plugs to 0.050 and then the misfires were gone but not the KR nor the studdering.

Going to try wires (warranty) next, then ICM (possibly free) then coils (wrecker).

Edit: this part makes me think its mechanical: It shows KR when in neutral coasting and revving it. Is that normal?

False. Check to see if something is hitting somewhere...EG, bad motor mounts, downpipe...flip your front sway bar upside down and test it again.

how in the hell can you make it knock revving in neutral?

EGR deletes rule.

^^Agreed. Just cut those brackets and put some JB Weld in em.

i was backfiring when my pacesetters were leaking real bad and I had vac leak at egr.

Welded pacesetters worked great for me on reinstalls too as long as you have something to ratchet the motor forwards or your buddy to pull on the motor...the rear/dp section will just slide right in...I'm tellin ya to flip your swaybar though...

Originally Posted by bluegtp91

Welded pacesetters worked great for me on reinstalls too as long as you have something to ratchet the motor forwards or your buddy to pull on the motor...the rear/dp section will just slide right in...I'm tellin ya to flip your swaybar though...

I did not have to flip mine, but my pacecrappers have been welded so much its ridiculous.

mine back fires with leaking pacesetters. weld/seal them up real good. should take care if that issue if there is no leaks.

Shouldnt...it'll just be loud as hell and obnoxious

So either the exhaust leak or the ICM was at fault.

Headers are poorly band clamped on, leak slightly and no backfire or cutting out when in boost. ICM also changed.

Now the car when at idle behaves like it has a vacuum leak. Up and down and up and down in engine speed till it gets down to 400-500 then back up to a grand then I have to give it gas else it dies.

Cleaned the MAF and I'm going to scan for codes in a minute and will update this thread.

Also note the MAP sensor is reading 21" of vac and vac gauge reads 20".

P0300.... fvck...

so your leaking before the o2 sensor at the Y ? That can really throw things off.