I have just bought a 1990 R32 GTR and have had it for two weeks now but only got to drive it for one.
The problem occured when i was driving along at 100 in 5th and the car fuel surged. It was just after i had filled the car up with fuel so initially thought it could have been bad fuel.
I gave it a bit of a strapping to see if i could get it to surge again but no such luck. The car was boosting up fine but seemed to be lacking abit of power.
I pulled up at an intersection and the car died on me. I started it up and it was flooding up and running rough. It wouldn't rev over 3,000 and was detonating popping flames out the exhaust. I babied it home and got to work the next day trying to find a problem.
The car starts and idles fine for the 1st 10 to 20 sec then starts to run abit rough then you give it a few revs and it sounds like its hitting a governer at around 3,000 and runs extremely rough at idle.
I replaced the spark plugs as they were foweled real bad. Problem still occured.
I figured i should start with the basics as it was running so rich and flooding the car up so much it may have been a fuel pressure problem. I grapped a set of pliers and held the car at about 1,500 where it was running really bad and applied pressure with the pliers to the fuel hose feeding the motor. Bingo car instantly ran better and i could now rev it to 5.000 before i couldn't regulate the fuel enough.
I replaced the fuel reg and still problem occurs. Replaced the Map sensor and still no help. Unplugged the AFM individually and they work like they should. I have had the scan tool on it from work and its showing no codes but indicates that the fuel mixture is rich which i already know by how much black smoke the car is pumping out. The others mechanics at work have as much idea about the car as me. I have checked the 3 main causes that contribute to this kind of problem but am lost on what to do next.
If anyone has encounted a problem like this or might know why the car is getting so much fuel please help.
One last thing the car is completely standard.