I was at VIR this past weekend. Went out on track with out turning TC off. Had a good session and at the end spun the rears a bit to kick the TC on which cut power then turned the ABS and TC lights on. That was fine, I hit the gas and kept going.

I parked my car and grabbed some water and some lunch. When I went to start the car it would stumble but not start. I unplugged the battery and the next day it fired up. I went to take it home and it started stumbling and shut off.

No error codes.... Norbert (thanks again for the help!!!!) suggested fuel pump since when I pulled the filter it was clean as could be. Is this the case? Will the pump just quit?

Thanks again

 

Have you checked the fuel pressure?

There is a schrader valve on the left front side of the fuel rail that will allow you to measure the fuel pressure.

 

Also check the fuel pump fuse and try replacing the relay as well.
You can ID both via the sticker on the inside of the lid of the fuse box.

 

Checked fuse and relays. Fuel pressure is non existant when the pump should be running....

Sounds like I checked all of the typical issues...
If it looks like one, it probably is...

 

If you put a pressure gauge on the rail, turned the key on and the gauge didn't move then it could be a bad pump.

The first thing I would do is unplug the connector going to the pump and check to make sure the ground is good, the ground should be right there in the left wheel well behind the upper control arm, check continuity between the plug and that ground, if it's good check to make sure your getting approx 12 volts when the key is turned on, you should be able to watch the meter display 0 volts then 12 volts and right back to 0 volts, if that checks good then you need a pump

 

When removing fuel tanks from C5's I remove the relay and jumper diagonally across the terminals in the fusebox If you look at the little diagram on the relay you will see if you jumper it diagonally you will not blow anything. Just use a fused jumper in any event. Of course my next step is attach a A/C hose to the fuel rail, and let it drain into a gas buggy. Basically your just bypassing the relay. If you have a bad pump it will not run.

This will run the pump constantly as long as you have the jumper hooked up.


Dave

 

Thanks Dave. I tried that and the pump will spit for a minute or so and quit. It will just trickle out. I will be out of town for work for the next week and a half so I won't be able to work on it for a bit.

Thanks for all the advice. I checked the ground and it was good. I haven't hit it with a volt meter yet.

Thanks again!