Too Rich!
Thread Starter
Melting Slicks
Joined: Jul 2005
Posts: 2,586
Likes: 2
From: Bardstown Kentucky
Too Rich!
I have a 95 LT1, No Cats, No emissions equip., 3"SLP Exhaust w/xpipe, Claw intake, and nitrous plugs. My car is running very rich. The nitrous plugs are colder, but would this be affecting my air/fuel? At least enough to be noticed? I am thinking of getting LT1 Edit, is there anything I can do with that to lean the car out a bit? What about a fuel pressure regulator? Would that help lean it out? Any help would be appreciated!
The Bomber
The Bomber
Burning Brakes
Joined: Apr 2000
Posts: 980
Likes: 2
From: Chandler AZ
I don't have an answer as to how to solve your issue.
I don't have an answer as to how to solve your issue, BUT, if you are talking about richness during less than WOT then a regulator won't help. Well unless you have bad fuel pressure issues it won't. The computer looks at the O2 sensors and tells the injectors to give the amount of fuel you need. If the O2's are funky, that may be part of it.
How did you discover you are running rich?
How did you discover you are running rich?
Thread Starter
Melting Slicks
Joined: Jul 2005
Posts: 2,586
Likes: 2
From: Bardstown Kentucky
Ok its rich across all tps positions. Especially under WOT. Over 900mv at the O2 sensors. What adjustments to the MAF can I do to correct? Or does something else need to be changed?
Safety Car
Joined: Dec 2002
Posts: 3,655
Likes: 24
From: Charleston SC
Originally Posted by 95BlueBomber
Ok BLM @ WOT is 135 135
@ 34.5% 132 136
@ 20.4% 125 125
75% Of the time the BLM is in the 130's.
@ 34.5% 132 136
@ 20.4% 125 125
75% Of the time the BLM is in the 130's.
How are you checking this? THe ECM locks the BLM's at 128 during WOT.
Part throttle BLM's in the 130's are not all that bad and the ECM is correcting for them. Just looking at the two numbers you have posted with no kpa data I would say you are fine, a tad rich but as I said in the range the ECM will correct for.
Thread Starter
Melting Slicks
Joined: Jul 2005
Posts: 2,586
Likes: 2
From: Bardstown Kentucky
tts datamaster. I am new to the tuning world and kind of confused on how it all works. I am having problems with the richness and spark knock. in a 4 mile drive i picked up 9600 knock count.
Pro
Joined: Sep 2001
Posts: 542
Likes: 1
From: Stuck in the 80's
Originally Posted by FD2BLK
How are you checking this? THe ECM locks the BLM's at 128 during WOT.
Part throttle BLM's in the 130's are not all that bad and the ECM is correcting for them. Just looking at the two numbers you have posted with no kpa data I would say you are fine, a tad rich but as I said in the range the ECM will correct for.
Part throttle BLM's in the 130's are not all that bad and the ECM is correcting for them. Just looking at the two numbers you have posted with no kpa data I would say you are fine, a tad rich but as I said in the range the ECM will correct for.
you're not too far off, ECM is doing it's job. Above 128 is actually lean, below is rich. I don't use Datamaster and have an L98, but knock counts do not mean timing retard. You're probably OK there too. If you hear pinging and are already using 92/93 octane then you may have a tuning issue, like too much timing. Stock calibration or do you have a modified .bin?
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Safety Car
Joined: Dec 2002
Posts: 3,655
Likes: 24
From: Charleston SC
[QUOTE=gbody5]Yea, : Above 128 is actually lean, below is rich.QUOTE]
True I was looking at the 125's because he was complaining of a rich condition. I also just noticed you state "No emissions equip". Does this include the EGR removed, did you have the ECM programed to compinsate for this? If not you need to because the ECM is correcting timing trying to compinsate for the EGR gasses that are now not there.
True I was looking at the 125's because he was complaining of a rich condition. I also just noticed you state "No emissions equip". Does this include the EGR removed, did you have the ECM programed to compinsate for this? If not you need to because the ECM is correcting timing trying to compinsate for the EGR gasses that are now not there.
Thread Starter
Melting Slicks
Joined: Jul 2005
Posts: 2,586
Likes: 2
From: Bardstown Kentucky
No EGR I dont know what to adjust for the EGR being gone. Does anyone have a .bin file that is close to what I have that I could simply upload and be done with it? Thanks!
Safety Car
Joined: Dec 2002
Posts: 3,655
Likes: 24
From: Charleston SC
For $60, $50 if you think it is a one time shot you can get a good tune with great suppotrt. Shoot Ion an e-mail. I use him for any LT1 mail order stuff I do and he is prety good. The F-body croud uses him quite a bit also with great results.
http://www.madz28.com
http://www.madz28.com
Drifting
Joined: Mar 2005
Posts: 1,923
Likes: 0
From: GA
Originally Posted by 95BlueBomber
No EGR I dont know what to adjust for the EGR being gone. Does anyone have a .bin file that is close to what I have that I could simply upload and be done with it? Thanks!