[enster1999]

If you live near the Ft. Lauderdale area, perhaps you could help me. I would like someone to diagnose the problem i am having with my car. I have a 98 Gt and when i hit the gas to the floor, it feels like it is bogging out. When I let up on the pedal a little bit, it then accelerates and has full power. I already changed the fuel filter, fresh gas, plugs and wires, cleaned maf sensor, changed tps sensor and ran fuel injector cleaner. I am not getting a check engine light, and also had autozone check for any codes and there wern't any. If you live in the area and feel you could diagnose this, let me know and we can get in touch. Or if anyone is able to solve this from the description, please help.

 

[alexcor]

Mobile Mod Performance - We Come To You!

 

[Shaken]

It sounds like from what you are describing to be a fuel pump going bad. They do make a fuel pressure gauge you hook up the rail and you can see the fuel pressure while the car idles. This gauge also come with a valve and a rubber hose which you put in a gas can. When you hit the valve and if the car stalls you need a fuel pump. If pump is good the car will not stall and you will begin to fill the gas can. I used this method on a 97 Yukon and the pump was bad but would still drive normal. It had a full tank of fuel the gauge helped me drain the tank.

 

[heavy metal]

i will second the fuel pressure,do a pressure test....

 

[enster1999]

Very interesting. So you're not necessarily saying the pressure, but also the volume of flow. Because if the pressure was low, then it probably wouldn't run at all.
I have 2 questions.... Any Idea where to get one of these pumps or is there a specific name for the pump you're talking about?
Second, I understand the pump is in the trunk. There is the mechanical part, and the electrical part. If it turns out I need to replace the 'pump', which part should I replace, the mechanical part or the electrical part?
I've heard these 'pumps' are pretty expensive to have replaced.

 

[heavy metal]

pressure and volume are probably low,it will run at lower rpm,s....but will stumble at higher rpm,s...you can get a fuel pressure guage at a local parts store to test with,if the pressure is lower than specs,replace the fuel pump,also available at the local parts store.replace the fuel filter as well.

 

[enster1999]

If it is bad though, would you replace the electric part of the pump, or the mechanical part of the pump. there are 2 parts to the fuel pump.
I already replace fuel filter last week.