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99 Pontiac Sunfire 2.4L shifting rough, no temp on gauge
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Adizm_55
New User
Jul 12, 2011, 2:31 PM
Post #1 of 1
(2553 views)
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99 Pontiac Sunfire 2.4L shifting rough, no temp on gauge
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So glad I found this forum. I hope someone can help me.
This car is showing 190,000 miles but the engine we installed last year has about 70,000 or so.
The car had a problem soon after the engine replacement with very rough shifting (automatic) and it stalled often and the engine light stayed on. We fixed this by replacing a small hose in the very front of the car that had dry rotted.
The rough shifting and light are back, but no stalling. The first thing I checked was the same hose and it is fine. I read some posts about similar problems and got the advice to replace the IAT sensor which I did. I cleared the codes at the auto parts store and installed it in the parking lot. It drove like a dream for about two minutes and then reverted back to rough shifting although the light has stayed off so far. The only code was a high voltage for the coolant sensor. I'm not even sure what that means but I do know my two gauge stays bottomed out and my heat does not work. I would really appreciate any help I could get because I need to (cheaply) hang on to this car until I finish medical school. And imm stumped because it seems it only runs correctly for a while after i clear the codes Thank you in advance.
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