91 grand am le 2.3 dohc it runs a little ruff more when driving

Sounds like you need new spark plugs and wires also a throttle body cleaning.

Sounds like you have an air to fuel mixture problem, have you put a scan tool on it, being a gm i suspect it may be the mass air flow sensor/map. Pull the codes to see why you are dumping fuel

1993 Pontiac Grand Prix 3.1 liter DOHC V-6 VIN "T"




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I would have to say the fuel/water separator filter is clogged up. The filter will remove water and crud from the gas. It looks more like a small can under the car. If the car set up with a low tank of gas, water will condensate inside and once the new fuel sloshes around it gets all this junk off the walls of the tank and that gets sucked in the filter. Try and replace that first..

1. It's spelled "rough", not "ruff".

2. Clean your fuel system with a commercial grade cleaner like BG-44K.

rotor,cap?may also be a bad distributor as well.

petrol or diesel

ruff idle may b idle controll senc. ----tapping may be plugs-- wires, and or gas try 91 oct gas next 3 tanks and see thats the cheeepset place to start

Hi I own a cadillac with the same motor. Never smoked but had all the same issues, ran fine cold but after a little driving (less than 2 miles) it shook like nothing else. The cause was the motor self destructed had to replace valves all 8 bosh injectors 2000 dollars later she is like new. Sorry about the bad news goodluck.

Hi you should change the coolant temp sensor this is a white sensor on top of the intake and is part ot the computer system.