morm

The injectors were the last thing I did and and no issues since.

The car ran fine, boost was less. I changed injectors with new OEM injectors and car is fine. I had injectors cleaned and flow tested. There was large differences in flow, both at low flow and high flow which I suspect caused detonation and lower boost 'limp' mode. The car is a factory 2000 RS4s. This is my experience and what worked for me (fixed issue).

It is lazy, doesn't work when outside is hot. Had it a/c re-gassed and if anything worse than before being re-gassed.

In case anyone is interested, the problem was blocked injectors causing knocking. I replaced them with new ones and car has been flawless since.

Has anybody replaced their series 2 Stagea (RS4 or RS4S) air conditioning compressor with a R34 compressor? Or a compressor from something else?

After a year of searching this problem still not totally fixed, after fuel pump swap, mechanic changing all relevant sensors from our cars R34 to c34 then adding NISMO fuel pressure reg, running on dyno (mixtures are good), fault is much better. Car is detonating occasionally causing the ECU to put the car into the knock limp mode, this limp mode does not bring up an engine check light. Has anyone else had issues like this? I am still trying to find root cause, not just work around yet. Thanks also to those who posted!

If the sale falls through, Im also interested.

Also the fault is not just occuring whilst on boost. I took the car for away last weekend. Whilst cruising(110km/hish) it can occur so when I went to overtake there was reduced boost! thanks again for your ideas!!!!

By removing the plug I meant the electrical plug. The fault does not thow you thru the windscreen. It just makes the car feel sick. From my understanding for this sort of fault it should throw me a fault code to go into a boost cut or 'limp' mode. I just hoped that someone had a similar experience, and had fixed not overcome the problem. Thanks everyone for the advice so far tho!

I disconnected the plug that goes to the bleed solenoid and that is where the boost is (level on the gauge) when the fault happens. The car s s s2 rs4s (manual!) with factory everything as far as I know. My laptop is away for repair so I cant check codes while car is running. Easiest way to reproduce fault is om open road when in 5th and to accelerate. The first two times the car will accelerate ok, on the third the boost is limited and need to cycle the key to get it to run well again. We have only had car for a short time(>5k kms), dont know much else of the history.

yes, rs4s. No engine light though. Got 55 code same after reset. Havent found if it shows code when happening. sounds very similar tho.

I posted a bit of wrong info, normally over 3/4, when fauts under 3/4. Have had a good look at hoses.

I have a 2000 s2 stagea. Most of the time it boosts well(over 1/2 way on gauge). Intermittly something happens and the boost doesnt even reach half way. The MI light doesnt come on(light is working). The car has no known mods. I have swapped the boost sensor, AFM with my r34 skyline. I have also replaced the plugs and visually checked the coil packs. Any Ideas please?