Mysterious big loss of power/drive on Spa circuit during parade laps.🤔

[Pride]

And lastly, I've ordered a fluid filled pressure gauge to test my fuel pressure before finally deciding to replace my pump.

https://www.ebay.com/itm/Fuel-Pressu....c100005.m1851

What pressure readings should I expect at what rev range for the pump to be working effectively.

Cheers.

[goldnsx]

Around 40 psi at idle but that won't say much. The real stress test is under WOT/high rpm. It should remain constantly at around 60 psi, certainly above 40.

Fuel-safe relay page 19-137 in the SM. Relais are quite cheap.

EDIT: with the fuel pressure gauge mounted you could go do a dyno of the car and monitor the fuel pressure. It's a little bit harder on the road to detect a fuel pressure drop as you didn't noticed it in 1st or 2nd but in 3rd (on UK roads? ).

[austrian type-r]

When the revs reached about 6500-7000, the whole car suddenly jumped and the revs rushed up but all power was gone.

EDIT: For some reason I only saw page 1 on my cellphone and could not swich to page 2,3 and 4. I see you solved the problem. Good. But below was my suggestion, more in the electronical area.

Did you see just the revs are climbing, or did you hear the engine screaming louder too?

I had similar issue this year with my stock engine. The revs bounced up and down while i still was on wot. And during shifting the revs gone crazy...up and down. After cooling down it was okay for 2 more laps, then the same again.

A guy with his race civic told me he had exact same issue years ago and it was the knock sensors cutting down power and revs gone crazy.... So i putted in heat range 7 ngk plugs.

We also changed the ecu and ignitor module and one heat range colder spark plug. All problems gone.

Whats wired is that with the exact same engine, ecu, ignitor and heat range 6 plugs i drove 3 times on track before in even hotter conditions. ...