I have a 1998 grand prix. The engine shakes and it will not idle. When I press on the gas it dies out. What could be causing this? I have had the fuel pump replaced, when they did that they said my plugs and wires were bad so I am getting those changed today. Could this be the problem for those symptoms?
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repairpal.com > Problems > Pontiac > Grand Prix Engine Stall Or No Start Condition on Pontiac Grand Prix. The fuel pump may fail ...No codes thrown... The car finally died on 8th avenue and 30th street in Manhattan. ...1996 Pontiac Grand Prix- 3.1L V6138,920Visitor. My car just decided it ...
if the check engine light is not on as it idles more than likely the cause is one of 3 things ,a vacuum leak this will cause higher idle speeds and loss of idle, the Idle air control sensor or switch stuck or not functioning this will cause no idle but if you depress the gas pedal slightly the car will run and idle as long as your foot is on the gas, last possibility is air inlet leaks these cars mostly came with mass airflow sensors if the tube that connects this sensor to the throttle body is leaking or broken it will cause the problem your explaining however this is the rarest of the 3 causes
Try a new gas filter and have the fuel pressure checked. Scan the engine computer for trouble codes. Check your air filter and replace if dirty or old. How old are your spark plugs, need new ones? Maybe it just needs a tune up.
check all fuses for turn signal and brake lights.change fuel filter . first. do a little tune up change spark plugs and wires . if changing fuel filter dont help. have fuel pressure check first before buying a new fuel pump .they run after taxes 400.00 dollars. your fuel pressure should be 41 to 47 psi. replace fuel pump relay also.