LS1 Idle Problem
Thread Starter
Staging Lane
Joined: Jan 2007
Posts: 59
Likes: 0
LS1 Idle Problem I just got my LS1 running in my 1981 Trans Am. It idles terribly. Because this was a transplant, all emmissions equipment was eliminated and the computer was supposedly reprogrammed accordingly. The car simply does not run well. The idle surges all over the place and it's way too rich. I don't get any trouble codes having to do with engine controls. All of the codes I get are for things like fuel level, transmission fluid temperature (TFT), oil temperature, etc. These are probably just modules that need to be turned off in the computer because they are not applicable to my set up.
Could this be a tuning issue? The motor is stock except for an SLP Mass Airflow Sensor and a Bullit cam with similar specs to an LS6. The computer has a mail order tune from PCMforless.com I even put on a brand new SLP Mass Airflow Sensor because I thought my used one might be malfunctioning. There was no difference. I'm pretty frustrated because I'm new to fuel injection and I don't know where to go from here because I'm not getting any trouble codes from the engine.
Any help would be greatly appreciated.
Thanks!
Could this be a tuning issue? The motor is stock except for an SLP Mass Airflow Sensor and a Bullit cam with similar specs to an LS6. The computer has a mail order tune from PCMforless.com I even put on a brand new SLP Mass Airflow Sensor because I thought my used one might be malfunctioning. There was no difference. I'm pretty frustrated because I'm new to fuel injection and I don't know where to go from here because I'm not getting any trouble codes from the engine.
Any help would be greatly appreciated.
Thanks!
TECH Regular
Joined: Dec 2005
Posts: 437
Likes: 9
From: Indianapolis
Where are you located? I don't pretend to know how to tune an LS1 don't know that much but people have friends come out and tune with HP tuners. Try asking around on the regional board that is local to you, most here are pretty cool and know a ****-ton about tuning these engines. May be able to get someone to do it for a few bucks and a case of beer 
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Thread Starter
Staging Lane
Joined: Jan 2007
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Originally Posted by 1987firechicken
And you got any pics of your ride that things sounds like it is gonna be a badass
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Verdad Gallardo TECH Regular
Joined: Dec 2005
Posts: 437
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From: Indianapolis
Sweet let me know when you post up those pic's I got an old 87 TA waiting for me to build a new motor for my 2002 WS6 I have now so it can inherit the slightly modded motor in the 02. How long it take you get get that beast in there and what kinda numbers you looking to make from your LS??
Thread Starter
Staging Lane
Joined: Jan 2007
Posts: 59
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It went in pretty easy. It was finding the right parts to make the accessories, radiator hoses and inlet system work that was the hard part.
I would think it has around 425 hp at the flywheel. I'll get some rear wheel #'s when I have it tuned.
I would think it has around 425 hp at the flywheel. I'll get some rear wheel #'s when I have it tuned.
I would yank the SLP maf off and put a stocker on.....those things have been known to cause lots of tuning headaches, and I'm willing to bet the mail order tune is set up for a stock MAF.
