RB25 help

[Abdo]

Idle is steady at 1,500rpm when cold, idle drops to 1,200rpm really quick and makes a louder noise when it heats up.if i punch (or tap) the gas pedal quickly, the car dies.i can get the rpm to a little over 3,000rpm if I ease into it, but then the car will later die. I was able to drive the car in my neighborhood, and it made it to 3,500rpm before it began sputtering.

the timing is set, throttle position sensor is set, new rb25t maf.walbro 255lph fuel pumpgreddy intake mani, q54 tbam performance turbo elbow d/pngk 3330 spark plugs, factory gapped (not re-gapped) at .032" (0.813 mm)

after i noticed a huge puff of black smoke out of the muffler, i turned the car off and checked the NEW spark plugs. they were fouled and black. I cleaned them off with a wire brush and tried starting the car again, same results. and the plugs were fouled once again.

this means (yes i know, I'm captain obvious) it's running far too rich.

I am guessing the stock fuel pressure regulator could be a problem with the walbro 255lph? I have an AEM FPR that i previously used on my KA-T. I'm not sure if I should go ahead and install that and see if it helps any.

Thanks in advance for your replies.

[Carl H]

bad engine coolant temp sensor.

[Abdo]

Is there really a way to check if it is bad? I'm asking so that I don't replace a good part and remain in the same "stuck" position I am in now, only haven spent money on a Z32 engine coolant temperature sensor that I didn't necessarily need. Thanks for the advice Carl, I appreciate your good help man.

[eh?]

stock rb25.

[Abdo]

Thanks.... "eh?" , I'll give this a shot Sunday.

Question: could the injectors, FPR, or coil-packs have anything to do with this occurrence?

[Abdo]

I'm moving this thread back to my original thread just so that I don't have too many threads scattered over my same car.

here's the link:

zerothread?id=262068

So if an administrator or moderator would lock this thread I would appreciate it.-Thanks
Modified by Abdo at 4:04 PM 10/25/2007