power-drop gremlin

[bonespec]

Have you checked fuel pressure when the motor falls off?

Almost sounds like a fuel pickup issue or a return line issue.

[Chip42]

fuel pressure is good.

[Greg Gauper]

Check your kill switch. These can go bad and cause a similar problem. Search for Jay Griffin's HP Runoffs video to see the sympton (car dies, comes back to life after cycling kill switch)

Also check your grounds. I had a similar problem that would cause the engine to die in left hand corners that I thought was fuel related, and spent a lot of time checking the pick-up, baffles, surge tank, etc. Turned out to be a loose engine ground that would only act up when the motor mounts flexed during left hand turns.

[chuck baader]

Limp home mode? Chuck

[JeffYoung]

That sounds like a ground issue to me. I'd check yours and just add a bunch. They don't hurt.

[Chip42]

Limp home mode? Chuck

most definately - but why??

I'm headed out to CFRC again wed with the S300 dataloging ECU from our FP car to see if I can identify anything.

I'll add a few grounds too. Thanks - see you at Savannah (don't pass me on the outside unless I get this fixed!!)

[chuck baader]

Something is out of spec. Maybe the O2 sensor...is the ECU looking for a narrow band and the OBD2 system use a wide band? Something as simple as that? Chuck

[Duc]

Sounds like it is going into a CAT protect mode. That is it starts leaning the fuel back at WOT to avoid burning the CAT out. Quite common practice, and another reason to do standalone.

You got my phone number? If not get it from David. I think I could get you some time at the office.