No power with gas pedal all the way to the floor. New coils, new fuel filter, new throttle body sensor, injectors, worse power than before the new coils. Anybody have any suggestions. Been suggested to get fuel pressure unit checked and possible getting another computer. Any help please I am desperate

Asked by rebafire Sep 07, 2014 at 05:58 PM about the 1999 Pontiac Grand Am

Question type: Maintenance & Repair

No power - gas pedal all the way to the floor.  New fuel filter, throttle body sensor, new coil
packs, thermostat, fuel injectors from the salvage yard, new plugs - help

4 Answers

26,865

Have the fuel pump checked to insure it is delivering fuel at the right pressure and the injectors match its pressure capability.

10,845

You don't mention any trouble codes? Not a big fan of replacing parts until the problem goes away. What was the original problem? If you have a bad crank sensor or TPS the engine will respond the way you describe, but there are also dozens of other issues that can cause the engine to have no power.

3 people found this helpful.
20

We had the same problem and our mechanicfound at last it was the air flow sensor!!!! Runs well now.

2 people found this helpful.
10

remove the O2 sensor before the cat. by the exhaust manifold and if the vehicle runs much better there is a clog in the exhaust system, most likely the cat.

Your Answer:

Grand Am

Looking for a Used Grand Am in your area?

CarGurus has 1 nationwide Grand Am listings and the tools to find you a great deal.

Postal Code:

CarGurus Experts

  • #1
    tenspeed
    Reputation
    11,090
  • #2
    James Sparrow
    Reputation
    2,360
  • #3
    John Saffrahn
    Reputation
    2,280
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Pontiac Firebird
15 listings

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.