Hi Guys,
Looking for some troubleshooting advice, I have a 96 S2 R33 with turbo back exhaust, 12psi (turbotech mbc), Bosch 040, super spark coils and iridium plugs.
For the past couple of months the car has been 'hesitating' under full throttle, you put your foot flat, the car builds revs as normal then all of a sudden it jolts like you've taken your foot off the accelerator and slammed it back down again, revs will continue to build for another ~5 secs then it will do the same thing again. This happens the worst in 3rd, 4th and 5th, occasionally in 2nd, never in first and occasionally it won't happen at all. Typically the earliest I see this problem would be roughly 3000rpm in 3rd, it does not occur in neutral.
Things I've tried:
- Removing intake from turbo right up to throttle body, visually checking joiners for splits and replacing hose clamps.
- Tested BOV operation with a compressor, eliminated (blocked) BOV.
- Tested wastegate with compressor.
- Checked vac lines to boost controller, dissasembled boost controller and checked spring/ball moving freely.
- Checked IAC vac line for visual splits, checked boost guage/fpr vac lines.
- Visually checked SMIC for damage.
- Checked AFM voltage not maxing out via consult.
Anyone have some advice of what I can try next?
Cheers.