Lean idle/exhaust popping
Posted 19 April 2017 - 12:52 PM
Ever since I got a new tune I've noticed my exhaust is popping at idle and whenever it's coasting. Fuel trims seem little high also, around +10. Under any other conditions car runs good, no popping, stuttering or power loss. Which tables can I look at/change to see if it goes away? Triple checked for any vac leaks, all good.
Posted 19 April 2017 - 08:33 PM
that popping sounds like your res or mufflers are rusting out.
Posted 19 April 2017 - 09:15 PM
Posted 20 April 2017 - 04:38 PM
Posted 20 April 2017 - 05:54 PM
I do have 60lb injectors as well. I see all the tables in HPT you mentioned except for trq abuse AFR or maybe I'm blind... Yeah if you can send me what you have that would be awesome so I can compare. Thanks!
As far as getting gas from the same station - that's what I'm doing too hehe
Posted 20 April 2017 - 06:31 PM
Posted 21 April 2017 - 12:48 AM
Thanks Derrick for the tables. I changed everything accordingly and no change-pop pop pop. It's not super loud but you can hear it. I also noticed it's only happening around 1000 rpm give or take so I lowered hot idle a bit, sounds much better but it's still there when I coast/let off the throttle. When I first started looking into it I looked at misfires on the scan gauge and after a long session in the garage I saw occasional misfire on 1 and 4 which is the same coil. So I replaced the ICM that I know for sure is good, swapped few coil packs - nothing. What are the odds of 2 wires going bad at the same time? ZZP wires, had them for 3+ years I wanna say and went through quite of few spark plug changes. Took them off/on as I was about to sell the car so they've been around the block lol. I'm gonna get new set of wires and plug away. Looked at the vacuum again today just to be sure -18 to -20. 3800 life
Edited by M_Dogg, 21 April 2017 - 12:48 AM.
Posted 21 April 2017 - 08:00 AM
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