81 malibu ls1
well i am using the holley efi hp system and doing the tuning my self. Not sure what timing a cam and ported head ls1 needs. or what air fuel ratio it wants at idle either. Or it could be a vacuum leak. Drives great and idles well when i crank it up until about 20 seconds of idling then it begins.
not sure exactly what front bags, but the shock is mounted on the back side of the control arm (the firewall side). Rides great but i would like to use shockwaves to make it handle a little better. having shocks so far in, the leverage on it seems off to me.
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Joined: Sep 2004
Posts: 3,148
Likes: 12
From: Downers Grove, IL
Are you running closed loop or open loop at idle? If its a big enough cam at idle it can pull some unburnt air right through and into the exhaust which gives false lean readings to the O2`s and they keep adding fuel until its way too rich. Do your fuel trims (I`m assuming the holley system has fuel trims like a LS PCM) go full positive at idle when it starts to lope? If so you may have to force it to idle in open loop.
Are you running closed loop or open loop at idle? If its a big enough cam at idle it can pull some unburnt air right through and into the exhaust which gives false lean readings to the O2`s and they keep adding fuel until its way too rich. Do your fuel trims (I`m assuming the holley system has fuel trims like a LS PCM) go full positive at idle when it starts to lope? If so you may have to force it to idle in open loop.
update, been a while but its been running for a bit and i love it so far. its on e85 and took it to the track and went a 11.4 at 120 mph with a 1.78 60' on motor on its 2nd pass so needs a different converter. but im too lazy to change it so im gonna just spray 150 shot on it to get the converter to loosen up and go back.
Are you using one of those JEGS overflow/catch cans for the radiator?
I ask cause I have one laying around that never got used, and was thinking about using it for the radiators over flow tank instead of dropping the cash on one of those polished billet ones right now.
I ask cause I have one laying around that never got used, and was thinking about using it for the radiators over flow tank instead of dropping the cash on one of those polished billet ones right now.