Lumina misses hesitates

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Asked by Sep 25, 2014 at 12:15 AM

Question type: Maintenance & Repair

91 chevy lumina 3.1 idles weird when cold then misses and hesitates.  have cleaned throttle body, iac and egr. recent new injectors. and tune up. Funny thing, cooling fans never come on. They came on when I did the paper clip obd1 test, but no other time also, I had 2 stored codes 44 and 45. Lean exhaust and Rich exhaust. Cant have both at the same time can I?? any help would be appreciated.

2 Answers

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lean and rich exast means o2 sensors cooling fans wont come on without enough pressure of Freon is Freon pressure up to par

10,780

do you mean freon in the AC? the ac hasnt worked in a long time. didn't know it had anything to do with the cooling fans. I am talking about the engine cooling fan. thanks for your reply!

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