My poor car

[Guest 382 GZV - 4 Door R33]

I know this has been talked about in other threads but now I can't find them when I need them most!

My car has developed a machine gun noise (a small jerking in the acceleration) above 5000rpm in any gear. My car is standard but for exhaust and K&N panel. At this rpm, the car is reading 9psi at the manifold.

The only two things I can think that may have triggered this is 1. I hit the speed limiter the day before, 2. I tried hooking up a boost controller (which I later took out) and wired it up wrong the first time - the car reached a maximum of 11psi but was immediately fixed....I tested the fuel pressure, spark plugs (replaced them with ones we know work) and resetting ECU but to no result.

Please someone help me!

Steve

[51jay]

Steve It still feels like a boost cut to me though I don't know why it should come into play at only 9psi.

Have you figured out how to run the diagnostics yet? If not give me a call and we can organise to do it. Another thing we can try is swapping in my boost control solanoid to check if yours is faulty....we should have thought of that the other day.

When is the fmic and pod going in?

[locutus_of_bris]

Did you hit the speed limiter or the rev limiter? Neither should really cause this though, rev limiter is fairly gentle

[nismoman18]

my car use to do that, its non turbo but i dont know if that makes too much difference. I recently changed the fuel filter and there is no problem now. I dont know if it was so dirty or sumthing it was clogging up but its done me well. I also put injector cleaner and additives in the engine oil cos it was developing a knock which has also gone too

[dAVE]

sure its not missing - if the plugs you put in are gapped to wide then it will miss. My car runs .7 bar (around 11psi) and will miss with anything gapped higher than .7 mm.. I would reccomend having plugs gapped to atleast .8.

[Guest 382 GZV - 4 Door R33]

The plugs I put in were gapped to .8 and I only have stardard boost (reading 9psi @ manifold).

I thought they had to change the fuel filter when they comply the car - it was complied end of Feb this year.

Jay -

Yeah, we should have tried your boost solenoid. I have tried to run the diagnotics but I couldn't find the screw/dial I'm spose to turn to begin the diagnostics.

The FMIC goes in on Monday next week (hopefully it's not delayed any longer). I have got hold of the adapter plate for the pod. I will drop round Saturday to pick up mick's pod and hopefully fit it before going on the cruise.

Steve.

[slip]

Fuel filter is a cheap thing to try. Definately sounds like a misfire.