High Idle when car is hot.
#1
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High Idle when car is hot.
I have noticed my car idles around 2,000 rpm when i am stuck in stop and go traffic for more then 10 min. I never really noticed this problem before but i commute for work now and i can only trace it to the car bring hot.
Any ideas?
Any ideas?
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#9
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I know this is years later - but I am having this same problem. I just got the car 6 days ago and it idles at 1000 RPM exactly, doesn't matter how long the car has been running or driving or anything - whenever I am not moving the car idles high. I talked to the local Mitsubishi Dealership and the service writer said he vaguely remembers a service bulletin where the dealer would load a "system upgrade" or something onto the ECU to solve the problem. Anyone ever heard of this?
I haven't tried the throttle cable trick yet - that will be my next step and we'll see what happens, but I am curious about this so called "service bulletin" he mentioned.
Thank you!
I haven't tried the throttle cable trick yet - that will be my next step and we'll see what happens, but I am curious about this so called "service bulletin" he mentioned.
Thank you!
#10
I know this is years later - but I am having this same problem. I just got the car 6 days ago and it idles at 1000 RPM exactly, doesn't matter how long the car has been running or driving or anything - whenever I am not moving the car idles high. I talked to the local Mitsubishi Dealership and the service writer said he vaguely remembers a service bulletin where the dealer would load a "system upgrade" or something onto the ECU to solve the problem. Anyone ever heard of this?
I haven't tried the throttle cable trick yet - that will be my next step and we'll see what happens, but I am curious about this so called "service bulletin" he mentioned.
Thank you!
I haven't tried the throttle cable trick yet - that will be my next step and we'll see what happens, but I am curious about this so called "service bulletin" he mentioned.
Thank you!
#11
Evolved Member
iTrader: (8)
In 2004EvoVIII case, it's more likely that someone played with the idle screw than his cable expanding with heat. He has the problem from cold to hot, which means he doesn't have the same issue the OP had.
2004EvoVIII, There are likely 2 possibilities in your case. Either the throttle cable was installed to far on the 2 holding screws on the intake manifold(which keeps your throttle plate partially open at all time), or you need to play with the idle adjusting screw.
2004EvoVIII, There are likely 2 possibilities in your case. Either the throttle cable was installed to far on the 2 holding screws on the intake manifold(which keeps your throttle plate partially open at all time), or you need to play with the idle adjusting screw.
#12
Evolving Member
iTrader: (10)
In 2004EvoVIII case, it's more likely that someone played with the idle screw than his cable expanding with heat. He has the problem from cold to hot, which means he doesn't have the same issue the OP had.
2004EvoVIII, There are likely 2 possibilities in your case. Either the throttle cable was installed to far on the 2 holding screws on the intake manifold(which keeps your throttle plate partially open at all time), or you need to play with the idle adjusting screw.
2004EvoVIII, There are likely 2 possibilities in your case. Either the throttle cable was installed to far on the 2 holding screws on the intake manifold(which keeps your throttle plate partially open at all time), or you need to play with the idle adjusting screw.
The only thing I can think of at this point is this adjusting screw - any chance I can get a location on it? I'm hoping this will be an easier fix then It's going to turn out to be, lol...once I get to work at my dealer I'm gonna pick up some TB cleaner and see if I can clean it up a bit as well.
Also - I called the local dealer and talked to a technician and a service advisor and both said they remembered something about a ECU software update for the Evo's to correct a "racing idle" but couldn't find anything in the service bulletins listed
#13
Evolved Member
iTrader: (8)
I'll try to get you a screenshot of where the adjusting screw is.
Edit.
According to the manual, it's where the screw driver is being inserted in the attached picture.
Last edited by blaze_125; May 12, 2011 at 01:30 PM.
#14
Evolving Member
iTrader: (10)
2004 Evo 8 - I have cleaned the TB, checked the cable, checked the pedal and all of that stuff checks out good. I'm beginning to think that there is a boost leak somewhere, which means it's time to build my "Home Depot Racing" (4RETECH) boost leak tester again like I had on my WRX. Hopefully it's something easy, cause I am not in the mood for this car to turn into my last car, haha..