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1990 Pontiac Grand Prix LE 3.1L Poor Idle Quality
It runs a little better,and I can get readings out of ecm on scanner, but idle is very bad. 15 - 20 inchs of vaccuum at MAP sensor. replaced sensor and ICS no better. I did notice the Check Engine light is not coming on at all!!! Checked for vaccuum leaks ...
FIX posted 10/7/1999
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Message Closed w/FIX
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| VIN | 1G2WJ14T1L |
| Engine | 3.1 L / 6 cyl / GAS |
| Trans | 3-speed Automatic |
| Delivery | FI / efi |
| Symptoms | Poor Idle Quality |
| Occurs | Always |
Trouble Codes
| 33 | M.A.P. sensor vaccuum erratic |
Message Closed w/FIX
Vehicle Data
1990 Pontiac Grand Prix LE
| VIN | 1G2WJ14T1L |
| Engine | 3.1 L / 6 cyl / GAS |
| Trans | 3-speed Automatic |
| Delivery | FI / efi |
| Symptoms | Poor Idle Quality |
| Occurs | Always |
Trouble Codes
| 33 | M.A.P. sensor vaccuum erratic |
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