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Old 08-14-2010, 10:10 PM
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1995 gm supercharged 3.8 swapping injectors

I have a 1995 3.8 supercharged buick with 2 bad injectors they came out with 29lb injectors and I came across a set with low mile but they are 30lb. Will these work without modifying the computer? How small can I go with out running to lean? I can also get a set of 24lb LT-1 injectors and thought about these since LT1's run 24lb and have more hp . Both sets are cheaper than 2 new ones.

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Old 08-15-2010, 11:50 AM
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Quote:
Originally Posted by 377tk
I have a 1995 3.8 supercharged buick with 2 bad injectors they came out with 29lb injectors and I came across a set with low mile but they are 30lb. Will these work without modifying the computer? How small can I go with out running to lean? I can also get a set of 24lb LT-1 injectors and thought about these since LT1's run 24lb and have more hp . Both sets are cheaper than 2 new ones.
Run the 30 lb ones. The adaptive fuel strategy stft and ltft will compensate. The 24 would lean the engine out and the adaptive strategy would probably trip the MIL ( check engine light) as it would head off the enrichment deep end.(20% or higher) to try to make up such a big difference.
GM had a lot of problems right around that year model with injectors being to much of an electrical load on there control modules as it was not designed properly. They did there best to hide that from the public. 95 is probably not effected but if your car starts shutting off after you change out the injectors that will be the problem. I have had several buick "K" engines that experienced that sort of problem.I finally got the skinny when a former GM rep was at my shop in Florida for an oil chang and the subject came up.
Change them out. chances are you will be OK.Seems to me I had some 96 models and a few 98 year models that were affected.I think they fixed the issue By 2001
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