5.3L pinging problem
06-05-2015, 04:20 PM
#11
What software do you tune with? 30 deg is a lot for a stock motor on 87.
On that note, I've seen a couple motors not show KR and ping. They would show KR and then zero out before they would ping.
Run some top end cleaner through it. A stock tune should not command that much timing at WO even with 6 deg being added.
On that note, I've seen a couple motors not show KR and ping. They would show KR and then zero out before they would ping.
Run some top end cleaner through it. A stock tune should not command that much timing at WO even with 6 deg being added.
Good point and that's kinda what I was thinking. I need to compair it to a known stock tune to see if that is what it's doing. Onlything I saw that is fishy about tune is it has 3.42 gears and has 29.7" tire selected in the speedo part. Shouldn't a tahoe have a 31" tire stock? Also speedo is a tad slow and that prob explains why. Tires on it are 285/55/20's.
06-05-2015, 07:11 PM
#13
Could the cai be jacking with mafs and making it do weird ****? It has a Spectire or whatever it's called kinda cheepish looking cai on it. Gunna clean mafs tonight and replace knock sensors and we'll see what happens. Don't want to do too much because I have a lq4 with 243's and my 210/216, .532/112 lsa cam waiting to go in. Just worries me with the pinging. Maybe I should keep 317 heads on the lq4??
06-05-2015, 10:43 PM
#17
TECH Veteran
iTrader: (36)
Reflash it to full stock, put a stock air box on it if you have one and check the plugs. Run top end cleaner through it and once all this is done you will have a baseline you can start from and go from there.
Check the MAF make sure it's clean and has the screen installed. If it's missing the screen find another MAF.
Check the MAF make sure it's clean and has the screen installed. If it's missing the screen find another MAF.
06-05-2015, 10:52 PM
#18
Nope needed a kid hauler my reg cab and nova were not too practical.
Reflash it to full stock, put a stock air box on it if you have one and check the plugs. Run top end cleaner through it and once all this is done you will have a baseline you can start from and go from there.
Check the MAF make sure it's clean and has the screen installed. If it's missing the screen find another MAF.
Check the MAF make sure it's clean and has the screen installed. If it's missing the screen find another MAF.
06-06-2015, 01:12 AM
#19
Excessive Carbon build up from Shitty gas usually causes the pinging in these engines. Run some fuel injection cleaner through it.
PM Me the Vin number. Let me see if I can get you the factory GM calibration for it.
By any chance is this an L59, Flex fuel Tahoe???
PM Me the Vin number. Let me see if I can get you the factory GM calibration for it.
By any chance is this an L59, Flex fuel Tahoe???