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Weird Problem After Timing Belt Change!

Psymon

By Psymon,
in General Maintenance

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Psymon Mentor

Psymon

Posted
Posted

Just finished changing my timing belt and pulleys. Started up the car and came across a weird problem. The car wont rev. It starts and idles fine, but when you give it any throttle, even WOT it doesn't rev at all. Everything else seems to be fine. CAS was put back in exactly the same place it was when i pulled it off, also double checked its plugged in. Any ideas what's happened?

RANDY Veteran

RANDY

Posted
Posted

doesn't rev like the accelerator pedal is not connected? Or tries to and can't?

Did you line up the belt markings with the marking on the cover etc etc? I don't know if putting the intake and exhaust cams out of whack would produce that effect or not...

Psymon Mentor

Psymon

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doesn't rev like the accelerator pedal is not connected? Or tries to and can't?

Did you line up the belt markings with the marking on the cover etc etc? I don't know if putting the intake and exhaust cams out of whack would produce that effect or not...

Tries to and can't. The belt was put on with all the markings and everything lined up properly.

chrissso Proficient

chrissso

Posted
Posted

how high will it rev when you try?

1k, 2k?

maybe one of the sensors is not plugged in. tps, afm, etc. check all connections.

make sure all your intercooler pipes are conntected and there are no leaks..

Psymon Mentor

Psymon

Posted
  • Author
Posted (edited)

It would only rev to 1k rpm tops. I didn't think intake cam being only 1 tooth out would make that much diference?

Checked all plugs on CAS, AFM and TPS. I was thinking along the lines of a bodgy TPS as there doesn't seem to be any reaction to throttle movements at all. I might run diagnostics when i get home from work and see if there's any codes.

Edited by Psymon
Psymon Mentor

Psymon

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Just ran diagnostics. Only code 55 which i'm pretty sure is because it used to be auto and i did a manual conversion so the computer thinks the auto isn't responding. So this would pretty much rule out all sensors wouldn't it?

Psymon Mentor

Psymon

Posted
  • Author
Posted

Some more progress. Twisted the cas about 5mm left and it seems to be behaving a bit better now. Actually getting it to rev now but still seems a bit dodgy. Should i grab a timing light and check the timing?

Psymon Mentor

Psymon

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Alrighty. Let it warm up and disconnected the AAC valve as per workshop manual's instructions, then checked the timing wtih a timing light. With the CAS in the position i had it to rev properly it was advanced to buggery (just about going off the scale of marks on the harmonic balancer) so i put it back to the original position and it was still advanced which was 1st mark past 0 degrees (which i'm guessing is 5 degrees??).

This is really frustrating the crap out of me. What the hell is going on with my car?!?

DRFT Rookie

DRFT

Posted
Posted
whip the covers off the front and wind the engine over and see if your marks are still lined up, just to rule out any chance you have the belt out a tooth

Yes do this.

Sounds like your cam timing is out. Not a good idea to run the engine either as you could have pistons hitting valves if your not careful.

RANDY Veteran

RANDY

Posted
Posted

So.. markings on the engine-part, markings on the belt, markings on the cam gears... right?

Make sure you put your CAS back to where it was. there should be a paint marking... about 15 degrees before top dead centre? I think it's about that for R33's?

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