idle problem s14 sr

[driftjunky]

i have a zenki with an s14 sr and after idling for a few min or at a light sometimes but not always it wont let me rev past 1500 rpms untill i shut off and restart. i got a new Maf still the same im thinking it might be my wiring but i really hope not. what do you guys think it could be?

thanks

[stevepaik]

Did you ever find out what the problem was?

I'm having a similar problem with my car except turning the car off and restarting it doesn't solve the problem.

It won't rev past 1500 RPMs, but it idles perfectly. My MAF is stock and is brand new.

Any info will be greatly appreciated.

Thanks,

Steve

[johngriff]

Disconnect the MAF and try to rev it.

[stevepaik]

Hey DriftJunky,

I thought I'd share my findings...

I adjusted my ignition timing this weekend and noticed that the motor won't rev past 1500 when the TPS is disconnected. I also noticed that even when I plug the TPS back in, it won't rev unless I turn the motor off and restart.

In my case, I think the TPS plug was dirty/loose because it took a bit of wiggling to make it snap into place after I set the timing. I cleaned the plug and sensor with some sensor-safe cleaner and it seems to have resolved the issue.

I'm guessing my ECU lost the TPS signal intermittently because the plug was dirty or not connected well. Hopefully this helps in your case.

Good luck!