Buick 6.0 Running Lean
Thread Starter
Registered User
Joined: Dec 2013
Posts: 1
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From: McAllen, TX
Buick 6.0 Running Lean My '85 GN has a fresh 6.0/4L80 install. The car is running good for the most part (misses on light acceleration from time to time, exhaust smells of gas at immediate start up)
But I am getting this trouble code, the car does need a custom tune, but with work I don't think I'll be able to get away for a month or so to get it done.
Will running my engine with the system lean do any type of damage in the meantime? Thank you in advance.
But I am getting this trouble code, the car does need a custom tune, but with work I don't think I'll be able to get away for a month or so to get it done.
Will running my engine with the system lean do any type of damage in the meantime? Thank you in advance.
It potentially could do damage yes. Especially if you get over idle or light load. Too lean will cause it to run hot and also cause knock. If the knock is bad enough damage could occur.
Are you running a totally stock tune? No codes turned off or removed, etc?
A too lean can easily be caused by a slow or bad O2 sensor.
Are you running a totally stock tune? No codes turned off or removed, etc?
A too lean can easily be caused by a slow or bad O2 sensor.
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
If your engine is near-stock then you may have a problem to troubleshoot, for example see here: http://www.gearchatter.com/viewtopic9037.php
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11 Second Club
Joined: Dec 2002
Posts: 1,498
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From: long island, ny
I love to help and i always have and have gotten so much help on this forum. Just have to disagree with his choice here thats all. so many other cars to do a swap in.
Another thing is he should not have done a v8 swap on a car he needs to drive daily knowing he probably might need a tune before it was perfect.
I say leave it and drive it how it is if you have to. dont even get close to full throttle and you should be ok. I would swap the O2 sensor right away if they are not new
Im sorry if i seem out of line
Another thing is he should not have done a v8 swap on a car he needs to drive daily knowing he probably might need a tune before it was perfect.
I say leave it and drive it how it is if you have to. dont even get close to full throttle and you should be ok. I would swap the O2 sensor right away if they are not new
Im sorry if i seem out of line
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TECH Enthusiast
Joined: Aug 2006
Posts: 531
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From: Land Of Enchantment
I am going to weigh in just for fun.....
I can see both sides of this argument, as I am doing the same thing. the 85 platform is hotair, and not set up as well out of the box as the 86-87 intercooled V6's. Going to a less picky 6.0l will definitely be less headaches in the long run.
Another argument for changing over would be the comment about not knowing if a lean issue will hurt the motor. That is gospel in the Buick world, proper fuel flow is essential to every engine.
Give everyone here all the important details of your build, and when the lean issue started, and you will get some constructive feedback.....
I can see both sides of this argument, as I am doing the same thing. the 85 platform is hotair, and not set up as well out of the box as the 86-87 intercooled V6's. Going to a less picky 6.0l will definitely be less headaches in the long run.
Another argument for changing over would be the comment about not knowing if a lean issue will hurt the motor. That is gospel in the Buick world, proper fuel flow is essential to every engine.
Give everyone here all the important details of your build, and when the lean issue started, and you will get some constructive feedback.....
