View Full Version : 2000 Infinity I30 runs ok but will not rev over 4000 rpm?

p m
10-24-2007, 10:14 AM
If you are light on the gas pedal it runs & shifts normally. Cruises fine at 70 mph at about 2000+ rpm. However, from a stop, if you floor it, it will only go up to about 4000+ rpm and just stays there. Won't spin the tires on a gravel road. Won't shift until you back off the gas.

If you floor it at 50 mph, it will down shift but only rev to 4000, which limits your speed. If you back off the gas it will up shift, drop the rpms and the car will speed up to 80+ mph.

Also, sometimes stalls at idle when cold. Idles okay when warm.

"Service engine soon" light is on and Autozone pulled the codes. PO171, PO174 and PO732.

I am thinking fuel filter, fuel pressure. I can't find a fuel filter and can't measure the fuel pressure at home.

Can any gargage measure fuel pressure for me?
Do I really have to remove the fuel pump to clean/change the fuel filter?
Am I on the wrong track?

Advice appreciated.

04-17-2010, 01:20 PM
did you ever solve this problem, I have exactly the same problem.