lt1 355 first start up help..
Thread Starter
Staging Lane
Joined: Dec 2011
Posts: 76
Likes: 0
From: Santa Ana,California
Hey guys I ended up getting a tuned from PCMforless nd the car still has hard time turning on and even stay on. It sometimes will idle on its own at 900 rpms but as soon I put it in gear it will die. I unplug the map sensor nd it will stay on when in gear I try tried calling PCMforless but they wont pick up help please
You have to do the iac relearn for it to work properly. If it doesnt have the relearn it wont run for crap and may idle high then low etc trying to find where it is.
check out www.shbox.com for the relearn tips
check out www.shbox.com for the relearn tips
Thread Starter
Staging Lane
Joined: Dec 2011
Posts: 76
Likes: 0
From: Santa Ana,California
I relearn the iac the car still has a had time starting on I.ll have to give about 1/2 of throttle for it to start also on it's on it wants.to die and it will turn of if I release the throttle then after a few seconds it stays on by it self but still dies if I put it in gear what else can it be guys.
Thread Starter
Staging Lane
Joined: Dec 2011
Posts: 76
Likes: 0
From: Santa Ana,California
The procedure I took to relearn the iac was.
1. Opened up the throttle a little
2. Turn on the car then release the throttle left the. Car on for 5 seconds
3. Turned of the ignition for 10 seconds
4. Then started up the engine and it keeps doing the same thing
1. Opened up the throttle a little
2. Turn on the car then release the throttle left the. Car on for 5 seconds
3. Turned of the ignition for 10 seconds
4. Then started up the engine and it keeps doing the same thing
Appears so...did you ever change out the fouled plugs 
You might just need a dyno tune as mail order tunes are known to be far less than ideal....they are an educated guess at best; even harder to tune properly with that big ol' cam you got lol.
You might just need a dyno tune as mail order tunes are known to be far less than ideal....they are an educated guess at best; even harder to tune properly with that big ol' cam you got lol. LS1 Tech Stories
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Change plugs. NGK TR55 is what I would recommend. If still nothing, you will need to get it live tuned. PCMForLess does great work and are excellent people, but a mail order tune on such a heavily modified setup will only get you close. It needs fine tuning to be dead on. Find a local reputable shop and get it dyno tuned.
Best of Luck!!!
Best of Luck!!!
Thread Starter
Staging Lane
Joined: Dec 2011
Posts: 76
Likes: 0
From: Santa Ana,California
The old spark plugs went off the. Car I replaced them with champions double platinum. The spark plug wires seem all good I have otvc nd they look all good could it be a opti problem the car will stay on after playing with the throttle a lil nd sometimes its idles in gear but it feels heavy and back fire from the in intake manifold.
