high idle


swynx

swynx

15+ Year Member

Joined
Mar 26, 2008
Messages
2,401
Points
3,101
Age
34
City
lewiston idaho
Vehicle Year
1994
Transmission
Manual
mom says she was driving the 97 2.3 today and when she pushes the clutch in it revs really high. she says its whenever its in neutral or pushes the clutch in.

shes not a great driver. and says that she pushed the clutch in, shifted, then let the clutch out and it "catapulted" her forward. im assuming by that word she meant she basically popped the clutch.

im worried shes gonna tear the tranny out by doing this..

so how do we fix this?
 
Could be a stuck throttle cable/linkage, bad vacuum leak.
 
Could be the above, but first I would check the Idle Air Control valve. If its stuck open, its letting too much air in at idle, hence the high revs. Its catapulting her forward cause when she lets the clutch out, its revved really high and doesn't drop back down to idle like it normally would.
 
our landlord is like 60 and works on cars all the time. he says that the catalystic converter might be plugged, would this cause the same problem?
 
swynx said:
our landlord is like 60 and works on cars all the time. he says that the catalystic converter might be plugged, would this cause the same problem?
Click to expand...

If anything a plugged up converter would cause the engine to bog down, not rev up. Easy way to check that is to get the engine hot and see if the converters are glowing.
 
adsm08 said:
If anything a plugged up converter would cause the engine to bog down, not rev up. Easy way to check that is to get the engine hot and see if the converters are glowing.
Click to expand...

thats what i thought, either way its supposed to be pulled on monday. i told her to just go buy a new aic valve for it and id put it on.

her check engine light randomly comes on. no difference in the truck usually. i did a tune up about a week ago. this time we got this problem with the check engine light.
 
Well, without a code, it's hard to guess, but that may be a converter.


The only code I have ever seen make the light come and go like that on an OBDII system was a P0420, Catalyst efficiency below threshold.
 
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