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I have a 93 R33 S1 GTS-T, I've owned it for 4 years & up till a month ago it was running perfectly.

A month ago the car started cutting acceleration while driving & randomly stalling.

Was advised to replace the Air flow Meter which i did & for 3 weeks it ran perfectly again.

However a few days ago the problems returned with a vengeance.

Symptoms now also include:

Pinging like its hitting rev limiter at 2.5k revs.( will drive normal if kept under 2.5k)

Stalling sometimes multiple times before it will run again.

Most of the time the car drives perfect, will fully boost & behave normally but then without warning it was start doing all of the above & then a few minutes later start behaving normal again.

I can't see any pattern & I've put it in to get diagnosed twice by my company (i work for Mazda) & they have been unable to find fault or get it to replicate the issues.

Any help for advice would be great.

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