R33 S1 Gts-T Constant & Various Issues, Need Help

[Tyranius]

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.

[scotty nm35]

Sounds like the afm needs resoldering. Was it a second hand item? It's pretty common unfortunately.

[Tyranius]

It was a reco one from a reputable supplier.

Where do they generally need re soldering?

[scotty nm35]

cut the sealant off the lid and solder the pins for the plug. There is a how-to on here somewhere.

[Ben C34]

Hi did they do when they reconditioned the afm?

How long ago did you get it?

[jiffo]

The 2500rpm etc all points to an AFM problem.

Would also pay to thoroughly check the wiring to the AFM.

I've seen one harness so badly squashed it gave the owner an intermittent fault.