92 prelude problems

[babyphay]

Hey wassup? Having problems with 92 honda prelude si........It revs up and down when in neutral??????And wondering which transmissions would work with mine????haha has no reverse....92 prelude si h23 5 speed

[honda_racing101]

What is the point of your poll?

As far as transmissions that work.-h22 and h23

[AllmotorBB6]

Originally Posted by honda_racing101

What is the point of your poll?

As far as transmissions that work.-h22 and h23

and f22 i believe. We need more info other than just that its jumping around at idle. Do you ahve any check engine lights? Check your iacv and make sure the screen isnt clogged up. You could have a vaccum leak as well as many other things which cause the idle to jump around.

[sgauss]

I have a h23 in an accord 91 body and when it is over 90 degrees F outside and I am at a light it revs up (1250) and down (750) if I am in stop and go traffic (dang college town). Would this be the same thing maybe?

[lilwhitelude]

Check idle air control (IAC) and coolant temperature sensor (CTS). If the temp sensor is reading too cold excess fuel will be sprayed, therefore high idle. O2 sensor reads rich mixture and then tells computer to not spray so much fuel, leading to low idle. Which will result in surging. Which is exactly what you are describing.
Have someone put a diagnostic Scanner (not a code reader) on it and read the output of the sensors. The check enging light may not come on unless these sensors are reading out of range.(negative voltage or excessive voltage). If your engine is obviously warmed up and the scanner says your engine temp is 32 degrees, that would be your problem. Or if it shows excessively less than normal temperature.
Also check the air intake temperature (AIT). this can cause similar problems if not working properly. And of course the obvious vacuum leaks.
The most important part is to find someone with a proffesional enhanced scanner.