my monte carlo is idling high ? I changed the idle air control valve but did not help? What else could it be?

riskydrifter
25

Asked by riskydrifter Jan 07, 2008 at 07:28 PM about the 1995 Chevrolet Monte Carlo 2 Dr LS Coupe

Question type: Maintenance & Repair

8 Answers

papa
Not Active

try changing throtle position sencer, and tempeture control sensor.

3 out of 3 people think this is helpful.
littlehorn
28,425

Yes, the PCM may not be detecting when the engine is warm enough to switch to "warm" operation, and if it's staying in closed loop mode, it's using a preprogrammed higher idle and fuel mixture to make the engine run. See if there are any stored check engine codes as well.

sideshow
75

Papa's spot on here, blatantly the the throttle sensor.

1 out of 1 people think this is helpful.
jerrydizon
90

I hope you did not replace any sensors right away,,,,try to reset the PCM and sensors...i.e. disconnect the negative battery terminal.... and pull all the wire connectors of TPS,IAC,COOlant SENSOR,and Knock sensor..and use contact cleaner and wipe it with clean ,dry cotton....put it back and connect the battery terminal...your PCM reads the default settings of its previuos run loop so, we just try to reset it ....see what happens.....

2 out of 2 people think this is helpful.
jaraymore86
30

im having the same problem i changed everything deal with idle to the point where someone disconnected it so it would stop fluctuating to high. What seems to be my problem...

3 out of 3 people think this is helpful.
jaraymore86
30

they did the reset on it too taking off the negative battery terminal and all that do u think its just a bad pcm?

jerrydizon
90

if that did not work try a good check up on the coolant sensor. try to pull out the connector and place a 200 - 300 ohm resistor in the terminal as if we are insinuating a hot engine temperature.( the coolant sensor reads 200-300 ohm when the engine is hot or normal operating temperature). start the engine , the idling should be low. dont switch on airconditioning . try this one and see if PCM reads right.

1 out of 1 people think this is helpful.
Dobermann
355

Check the throttle position senser.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Monte Carlo
Looking for a Used Monte Carlo in your area?
CarGurus has 2,116 nationwide Monte Carlo listings starting at $1,495.
ZIP:

Search Chevrolet Monte Carlo Questions

Chevrolet Monte Carlo Experts

#1 dandyoun
dandyoun
Reputation 270
#2 Tom Demyan
Tom Demyan
Reputation 260
#3 tenspeed
tenspeed
Reputation 190
View All

Used Cars For Sale

2007 Chevrolet Monte Carlo For Sale
7 Great Deals out of 212 listings starting at $3,450
2006 Chevrolet Monte Carlo For Sale
12 Great Deals out of 343 listings starting at $3,900
2005 Chevrolet Monte Carlo For Sale
217 listings starting at $3,250
2004 Chevrolet Monte Carlo For Sale
16 Great Deals out of 348 listings starting at $1,495
2003 Chevrolet Monte Carlo For Sale
8 Great Deals out of 283 listings starting at $1,998