I think it might be an exhaust leak but not sure. No mods except JUN flywheel. Its a 94 gsr with 211,200 miles. My car is turned on, 1 minute later the rpm goes from 1000 to 4000 to 1000 to 4000 etc. I step on the pedal up to 5000 than it goes back to the 1000 to 4000 to 1000 etc. Any advice. Thanks guys.

 

idle air control vavle??? or tps im guessing

 

I'm willing to say the tps as well?

 

i think its the IACV

 

what is tps?

 

Throttle Position Sensor

 

sounds like the fast idle thermo valve to me i had the same problem a couple weeks ago (surging idle) its an easy fix . remove the throttle body and underneath it is the fitv remove it and inside screw in the white piece(it backs itself out , bad design that honda did away with a few years later) replace everything and that should do the trick

 

idle surging sux could be TPS or maybe even somthing wrong with ur ecu

 

its the iacv. it happens to lots of hondas. just take it off, spray it out with carb cleaner and put it back on.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B20TDC2 &raquo;</TD></TR><TR><TD CLASS="quote">sounds like the fast idle thermo valve to me i had the same problem a couple weeks ago (surging idle) its an easy fix . remove the throttle body and underneath it is the fitv remove it and inside screw in the white piece(it backs itself out , bad design that honda did away with a few years later) replace everything and that should do the trick</TD></TR></TABLE>im with him..i fixed mine....make sure tighten that plastic screw like well...

 

could be thermal valve, thats what was wrong with mine

 

i didnt replace my iacv i simply screwed the plastic ring inside back it and put a few drops of lock tight and i was good and ready to go..

 

locktite +plastic =melting plastic, not a good idea at all!!

 

either the fitv or check for vaccum leaks.

 

There could be something wrong with your gauge

 

B20TDC2, thanks man, that was the trick. Took 2 days to do, cause of work schedule, but I got it to work. A million thanks.

 

I just did mine (FITV). Took about 1 hour working at a slow pace. The hardest part was taking off the coolant lines. I think loctite would of been great if I had any around. Thanks guys! I knew if i took it to a local mechanic, they would of probably charged $150+ for that.

 

Help!!!!!!!!!!!!!!!!!!!!!!!!!

i have done everything in this thread and no luck.

new iacv, new throttle body/tps, tightened the white plastic ring in the fast idle, sprayed starter fluid everythere and no surges.......help!!!!!

the only code that every comes up is heated O2 sensor and that is new as well....light not on right now, every now and then.

i have a b18c1 jackson raceing supercharged all new hoses, injectors, .....list goes on.. but i cannot figure out this surging problem


any help is greatly appreciated!