Thread: Fuel pump problems?

My car has been acting up, as it surging and stalling. If I'm sitting at a red light and I give my car a little gas to pull up farther, it either stalls, or the rpms hit 200 then it surges way back up to about 2k rpm. When the rpm's drop it honestly feels like its flooding with gas then the rpm's go way up to correction for all the gas. I've been thinking it was a vaccuum leak for a long time, but now after I get out of the car, running or shut off it smells pretty strong of gas, like raw burnt gas. I had some code a while back that had to do with the fuel pump/regulator but I can't remember what it is. Any ideas? oh and I also don't have a rear o2 sensor in, BUT it's been like that for a long time and I never had any problems without it. But maybe a contributing factor?

I would check the vac line to your fuel pressure regulator first.

The only thing the matter with deleting a rear 02 is that there is a Cat diagnostic test that can occur on 01+ if you delete your rear 02. Sometimes it doesn't matter whether it has an 02 emulator or the codes deleted. When it goes into this diagnostic, your fuel trims will rise and fall and the car may have a rough idle. The only way to fix this is to have someone with tiny tuner delete the test.

Also listen for the fuel pump to change pitch at key-on. You may want to test the voltage at the pump to see if the wiring is bad or what kind of volts you are seeing. I would just get a different fuel pump as well as a fuel pump rewire.

Easiest way to troubleshoot the Maf is to unplug it and see if the same thing occurs.

Well, I'm gonna replace the fuel filter tomorrow and see what happens. I've un plugged the maf, and it's kind of the same symptoms but just worse. I just hope I don't have to change the fuel pump. Speaking of which, is there trunk access to it, or do I have to drop the tank?

There is trunk access

oh yeah, I forgot to mention that when the car is idleing theres a hiss coming from the fuel pump area, could that be the vac leak?