runs rough

20

Asked by Dec 30, 2013 at 03:37 PM about the 1996 Pontiac Grand Prix

Question type: Maintenance & Repair

1996 pontiac grand prix,  car is hard to start, with this an intermittment problem, the other
day it was very hard to start and while driving home, car died, It would restart (difficult) and
was running very rough, like timing was off, when placed in drive, car would die. Ended up
call tow truck. The check engine light is Not on, with the only dashlight lit being low
coolant which comes on and off since having a new radiator installed

3 Answers

238,065

Check the fuel pressure or for a vacuum leak. Top off the coolant too. Let us know what you find.

1 of 1 people found this helpful.
20

all are connected, coolant topped off. No change, car hard to start with very rough idle

2 of 2 people found this helpful.
66,285

If this is a GT model with the 3.8 L V6 pull the oil dipstick. Does it have white milky "goop" on it? If so your intake gaskets have most likely failed. These engines are notorious for that. Also, check the crank shaft position sensor, it's plug and wiring. Another trouble spot. The low coolant light issue is from whomever installed the new radiator not drilling out the two dimples in the plastic radiator tank where the low coolant sensor goes onto the radiator. One final thought. If your Grand Prix has over 100,000 miles on it you're due for a tune up. This consists of plugs and wires. As part of the tune up have them check your coil packs as well. Given the age of your car they may be failing. If 1 is bad/weak, replace all 3. They'll soon follow the dying one. HTH. -Jim

1 of 1 people found this helpful.

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