i think that look his "Holy shit, they made it 1/3 of the way around the track!"
We had serious fuel delivery problems and could barely finish one lap. Looks like debris in the fuel tank. We can drive around for 2 hours and it runs fine, but as soon as we hit a rough section of track fuel dies and stays that way. Park the car for 30 minutes and its good as new, until the next step of bumps.
As far as I can tell, the fuel pickups are picking up debris and clogging, and then with the engine turned off, dropping the crap and it settles to the bottom making it hard to tell if you've fixed it without getting back on the race course.
Finally started working on this problem this weekend.
Start by using our hitech fuel cell drain system (tm) to dump 30 gallons of fuel.
Pull the fuel cell out
Pop it open and get a first peak at the baffles in 4 years.
Found very little debris in the tank. Not nearly enough to have been our problem.
A little abrasion where the pickups sit, but not enough to be concerning.
Wipe everything out really well, repopulate the tank and reinstall.
I didn't take any pictures after this. XCM pulled both ends of the fuel lines, and we blew solvent and fuel through them with air pressure, really nothing remarkable there either.
Pulled the plugs and did compression and leakdown testing. Solid numbers across the board, nothing I would consider remarkable.
Tossed another new CPS in the car. Went from the high altitude ones we've been running for a number of years back to a stock one, and surprisingly the car idles a little better now? I will have to reevaluate that mod.
With the car running, went end to end over every wiring harness checking for chafing, any changes in idles, etc, and found nothing.
Went over the vacuum lines and found nothing. Checked the intake system for vacuum leaks, again nothing at all.
Running out of ideas as to whats wrong. Ordered a new ECU to swap in, will load up all my tools and parts - and head to JV to do some more testing and try to get it to act up again.
Sometimes I hate cars. I really want to be working on the new project right now and not this one.
arty:
