Running lean!
Thread Starter
Racer
Joined: Apr 2002
Posts: 471
Likes: 0
From: Rainbow City Al
Running lean!
In the upper rpms I am getting some detonation. I have not autotapped but I can hear the pinging. I have a donaldson blackwing and no MAF screen. Would this alone be the cause for my lean conditon? If so then how can I compensate for this.
Thx
Jeff :chevy
Thx
Jeff :chevy
Le Mans Master
Joined: Sep 2001
Posts: 5,857
Likes: 84
From: Gainesville VA
Re: Running lean! (97 C5)
Guess the Non-screeners are speaking up.... ;)
Has it always done this or did you just jump on the screenless bandwagon?
What octane do you have in your area as supreme? 91,92 or 93?
Is the air filter element clean? Is the mass air ends clean if not got to radio shack and get electrical contact cleaner and remove and spray.
Hope some of this helps.
Has it always done this or did you just jump on the screenless bandwagon?
What octane do you have in your area as supreme? 91,92 or 93?
Is the air filter element clean? Is the mass air ends clean if not got to radio shack and get electrical contact cleaner and remove and spray.
Hope some of this helps.
Safety Car
Joined: May 2000
Posts: 4,827
Likes: 351
From: Albuquerque NM
Re: Running lean! (97 C5)
I'd check it with autotap or Ease, and if you are lean you can use a Maf-t to compensate for it. I'd also check the air temp going in. Feeding your blackwing cooler air will help.
[Modified by 6Speeder, 11:23 AM 6/17/2002]
[Modified by 6Speeder, 11:23 AM 6/17/2002]
Thread Starter
Racer
Joined: Apr 2002
Posts: 471
Likes: 0
From: Rainbow City Al
Re: Running lean! (97 C5)
I use 93 octane and I thought about trying a little octane boost. The air filter is clean and so is tbe MAF ends. The PCM has not been re-programmed. Could I reprogram it and that help?
Jeff
Jeff
Le Mans Master
Joined: Nov 2000
Posts: 6,266
Likes: 156
From: Galloway Twp. NJ
Cruise-In VII Veteran
Re: Running lean! (Buckmaster)
I would say with those mods you are lean.
I have a blackwing and I checked the difference between the stock MAF with no screen and a Granatelli MAF. I autotaped my car and I was 18% lean with the blackwing and stock MAF with no screen! and 5% rich with the blackwing and the Granatelli MAF.
since I have a MAF translator, it was easier to tune out the 5% rich than the 18% lean, so I kept the Granatelli MAF on the car. :cheers:
I have a blackwing and I checked the difference between the stock MAF with no screen and a Granatelli MAF. I autotaped my car and I was 18% lean with the blackwing and stock MAF with no screen! and 5% rich with the blackwing and the Granatelli MAF.
since I have a MAF translator, it was easier to tune out the 5% rich than the 18% lean, so I kept the Granatelli MAF on the car. :cheers:
