1990 Chevy Lumina Help

PURPLEPASSION

MEMBER
1990 CHEVROLET LUMINA
6 CYL
FWD
AUTOMATIC
157,000 MILES

My service engine light comes on after it is warmed up. My gas mileage went down bad. I acts like it wants to die when I am at a stop light. It also acts like its cutting out. We replaced the coils and checks fluids. We are now thinking that it might be the Oxygen sensor. Please help before I go broke replacing parts.

5 Replies

BLACKOP555

MECHANIC
10,371 POSTS

If you dont want to go broke then get to the nearest autozone and have them scan the computer and post back the code so I can tell you what is wrong and what to replace.

They will scan for free!

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Sunday, July 6th, 2008 AT 7:44 PM

DNAPRORACING

MEMBER
120 POSTS

Autozone wont scan a 90. You'll have to jump pin a and b in the diagnostic center.
There are several posts on here that explain how to do it. Then post the codes here and we'll tell you what they are.

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Sunday, July 6th, 2008 AT 8:46 PM

BLACKOP555

MECHANIC
10,371 POSTS

They scanned my 87 :O have a nice little tool that hooks up to it

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Monday, July 7th, 2008 AT 8:36 AM

DNAPRORACING

MEMBER
120 POSTS

Autozone nor pepboys would scan my 92. I had to use the good ol paperclip.

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Monday, July 7th, 2008 AT 10:09 AM

BLACKOP555

MECHANIC
10,371 POSTS

Same purpose, find your dlc connector, the upper right hand corner the two in the upright hand corners are a and b, put a clip in, turn ignition and the check light will flash out.

As dna says.

Do a search on the forums here and you will find lots about it.