gtpaftff3.hpl Stumped as to why my 2000 GTP is stumbling and getting KR when you really get into the boost....just replaced the 02 and fuel filter.....car runs great until you get into it...car is completely stock other than a K&N and gutted airbox
Any ideas would be appreciated...
Thanks,
John
Last edited by jdtower23; 02-12-2014 at 05:17 PM.
I see misfires going on.
Cylinders 3 and 4, from what I see through my scanner.
Does the check engine light flash??
I'd start by changing plugs and wires, then inspect the coil packs.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
Really? How can you tell that? Still a little new to this....no CEL at the moment
Thanks!
Last edited by jdtower23; 02-12-2014 at 05:30 PM.
I clicked on your scan and went to tables, and it shows each cylinder on the left side for misfires on my screen anyway.
At around the 10-11 minute mark some misfires come up on cylinders 3 and 4, up to a 50-60+ count, so it's a pretty good miss and thus the stumble you likely feel.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
Thanks a lot! This really helps!
If you do go out and buy plugs, just never buy platinum plugs for a 3800. The waste spark ignition system will eat them alive and you'll get the same problem again. Go with Iridium on a stock vehicle.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
I know that much at leastI have AC Delco Iridium in it right now so I'm thinking coil pack or wires...I have a '99 Regal GS also so going to swap a coil pack and see if it helps....
Thanks
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