every morning when car is turned on idling starts going up and down from 1000 to 2200 rpms dont know if its my timing or a sensor...please reply thanx

 

It can be numerous things. Here is the run down.

1. Vacuum leakage
2. Leaking EGR valve
3. Air Filter could be clogged
4. Fuel pump or filter may not be delivering enough fuel
5. Leaking head gasket
6. Timing belt/pulleys worn
7. Camshaft lobes are worn

Hope this helps.

 

well i checked my air filter and it has engine oil and motor was rebuild just piston work done to it but the stupid mechanic left the same cam shafts on the car but changed the other parts. good looing out im going to take the car to get a dianostic
hope i find a solution

 

integra doesn't have a egr

 

icav

 

tps

 

like the last 2 posts said, TPS (throttle postioning sensor) or IACV (idle air control valve) you can always reset the iacv and see if that works for you and or replace it. search for the method to check the voltage on the TPS sensor.

`those are the most likely culprits, however vaccums leaks and dirty filters etc. can also be effecting the idle. spray some carb. cleaner around the throttlebody gasket and the intake manifold gasket to see if they might have gone bad. oh and dont forget to search

 

low coolant or a bad thermostat could make the RPMS fluctuate

 

like they said vaccum leak or faulty tps

 

well im going crazy since i cant find a tps dealer sells whole thing tps and tb and was looking into buying a 70mm tb but spoon doesnt make it for a 91 intergra, and other companys make it for 92-up which i think its the same 92 as 91 well if any one knows where i can get a tb with a tps sensor on it let me know........

 

well its not the tps it has to be iacv.......

 

not iacv

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Medek &raquo;</TD></TR><TR><TD CLASS="quote">
spray some carb. cleaner around the throttlebody gasket and the intake manifold gasket to see if they might have gone bad. oh and dont forget to search </TD></TR></TABLE>

 

just did that today.. no luck ... i been told that it might be a solinoid under the throttle body so im going to change that...and if that dont work im going to the dealer

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mugen92acintls &raquo;</TD></TR><TR><TD CLASS="quote">low coolant or a bad thermostat could make the RPMS fluctuate</TD></TR></TABLE>

plz explain how low coolant can cause rpm fluctuating? not saying its untrue, i just dont know if it is, thx

 

Hey,

Have no fear. I had the same problem with mine and after days of pulling hair i found it out. It's most likely, and i'll put money on it, your Fast Idle Thermo valve. I'll tell you how to figure out if this is the problem or not. First take of your air intake tube that connects to your throttle body. After you take the tube off look inside the Throttle body. You will see your butterfly valve, but more importantly you will see a little hole right before it at the lower left. Now, start your car and go and place your finger over that little hole. Your car will idle right down. And there's your problem.
Let me know if this is the problem and i'll tell you how to change the FIT (which is really easy) or i can tell you how to do a really quick fix, which also works fine and makes the car not embarrasing to drive.

D.

 

Low coolant levels in hondas will cause the RPMs to fluctuate because the cooling system does not have enough coolant in it to let the thermostat open or if the thermostat is faulty and not opening. Most likely, if the temperature gauge doesn't move from its usual position this isn't the problem. I would check the Idle Air Control Valve. I'm not really sure whats going on with that thing but my brothers 4door did the same thing after we took all of the emissions controls off of it and put a JDM B18A1 ECU in it. I'm not really sure so I'll post back to confirm but the IACV has a set screw on it that is adjustable and he got his car to idle just fine when its at normal operating temp, but when he first starts it it wil fluctuate until the temp guage moves. Throttle bodies with TPS..... NO PROBLEM! I can get pre-obd and OBD 1 Throttle bodies for cheap used all day long. I've also heard that if the TPS is the problem, that when you unplug it it will still fluctuate so I don't know man so what you can find out and post back.

 

well im gettingthat fit valve tommorow from the dealer im still going to try that idea u gave me to check it out... thanks...

 

coolant level fine and thermostat just been put on 3 months ago....and tps changed ,aicv changed now hopefully its the fit but thank for ur help

 

Just plug the hole and let us know if that's the problem

 

this is a new one by me.. props for the good info

 

well i did that trick u told me to do and it worked so it was the fast idle valve after all ...wardstar thanx for all the help ....

 

Nice, now if you want to fix the problem now. take the FIT valve off (3bolts and 2 small coolant lines.) You'll see to holes behind the fit valve once you take it off. Cut a piece of sheet metel or tin big enough to cover holes and bolt fit valve back on. problem fixed.

 

got it new but thanx anyway