rpm's going up when shifting

**US1GGTE** · 04-09-2006, 03:13 AM

has done it once but fixed itself, but started to do it again, i think it a timingt belt issue, i already have one on the way ....just lately idels at about 1k-1500 and then while clutching in on upshifts ..rpm's jump a few hundred rpm's, like 3k=3300 or so somethng like that...thinking bout cleaning the ISCV but dont think it will solve the problem when my rpms jumping...any help appreciated thanks

**Vios-GT_07** · 04-09-2006, 03:26 AM

sticky throttle? throttle cable needs a bit of grease? throttle plate's spring mechanism needs oiling?

i''m just thinking mechanical bits before jumping to big conclusions

**US1GGTE** · 04-09-2006, 03:28 AM

ya....i can hold the cable back and it comes down, as soon as i let go it kinda jumps a little, also this morning fist time it has done this, is the rpms, bounce from 1k-2k back in forth temporarely

**Vios-GT_07** · 04-09-2006, 03:30 AM

sounds like the idle control mechanism.. take it out and give it a clean

could be muck in there

**US1GGTE** · 04-09-2006, 03:32 AM

will do. was just reading the writeup bout the ISCV cleaning

**o_man_ra23** · 04-09-2006, 07:07 AM

oxygen sensor?? They can do that sorta wierd stuff when they get a bit clogged. disconnect the wire, and see if it changes anything. If it gets worse, then its not oxy sensor. Also possibly MAP sensor... try the same thing. It might not be recognising that its coming off throttle.

Cheers, Owen

**US1GGTE** · 04-09-2006, 07:29 AM

well i think i found the problem, while driving the rpms continued to rise, with an idle at 3000rpm so i shut her off coasting into the driveway.and popped the hood the ;throttle cable bracket where it goes to the ideler i thnk ..big black rubber nipple looking thing..has come loose not even in the thing..just sitting next too it nut is still attched afetr it cools ill be fixing it and ill try the oxygen sensor thing too