just finished H/C install on my procharged 98
04-02-2005, 04:01 PM
#1
Flossin' twin turbos
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just finished H/C install on my procharged 98 so here's my problem it's running so rich it's hurting my eyes. but from the logs it's says it's lean stft went to +59 and ltft are at +25. and o2's stay at 20's and 30's,they only went up to 860 once. are my 02's bad? i think they got soaked in coolant when i swaped the heads. i'm also getting from 10 to 15 degrees of knock retard. did i scale the injectors correctly? i multiplied the stock 28's by 2.06. i have delphi 50lbs injectors on it that ran fine before the H/C swap. any ideas guys?????????
also i took a video clip of it running, how can host this myself?
also i took a video clip of it running, how can host this myself?
04-02-2005, 11:22 PM
#6
Originally Posted by Pro Stock John
+ltrims are rich, -ltrims are lean.
I agree you o2's might of been soaked in coolant, and are now fouled over with fuel and are dead. I'd look into vette rear o2's. I've also seen extreme excess fueling causing knock, or false knock.
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04-03-2005, 07:08 AM
#9
Flossin' twin turbos
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i need to host this somewhere better but this is all i found.
click http://rapidshare.de/files/1113674/1.wmv.html
scroll to bottom-
click free-
wait for however many seconds it says at BOTTOM-
then download-
click http://rapidshare.de/files/1113674/1.wmv.html
scroll to bottom-
click free-
wait for however many seconds it says at BOTTOM-
then download-
04-03-2005, 02:29 PM
#12
Originally Posted by Moparnos
oh ok so it is rich how do i correct this
Did you retune it for h/c, perhaps its not programed for the 50lbs injectors? did you try running with no maf? How big is the cam? is the problem idle only or when your driving. Might need to rescale your VE table big time if its a large cam. Hopefully its a blower cam with low overlap. loose harness somewhere ect.
04-03-2005, 02:48 PM
#13
Originally Posted by Moparnos
so here's my problem it's running so rich it's hurting my eyes. but from the logs it's says it's lean stft went to +59 and ltft are at +25. and o2's stay at 20's and 30's,they only went up to 860 once. are my 02's bad? i think they got soaked in coolant when i swaped the heads. i'm also getting from 10 to 15 degrees of knock retard. did i scale the injectors correctly? i multiplied the stock 28's by 2.06. i have delphi 50lbs injectors on it that ran fine before the H/C swap. any ideas guys??
Good luck,Ed
04-03-2005, 05:05 PM
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Originally Posted by SmokingWS6
+LTFT means the pcm adds fuel due to a lean condition. -LTFT pcm pulls fuel from the mix. If your pegged +25 that meas the pcm is dumping in a ton of extra fuel, most likely a mialfunction somewhere, or a tuning problem.
Did you retune it for h/c, perhaps its not programed for the 50lbs injectors? did you try running with no maf? How big is the cam? is the problem idle only or when your driving. Might need to rescale your VE table big time if its a large cam. Hopefully its a blower cam with low overlap. loose harness somewhere ect.
Did you retune it for h/c, perhaps its not programed for the 50lbs injectors? did you try running with no maf? How big is the cam? is the problem idle only or when your driving. Might need to rescale your VE table big time if its a large cam. Hopefully its a blower cam with low overlap. loose harness somewhere ect.
04-03-2005, 07:50 PM
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after messing with the tune all day i have the ltft and stft between -5/+5. idles ok at 850 but still getting upto 14 degrees of KR at times. also i think the two grounds at the back of the driver head are messed up and are not ground the pcm i believe.