High Erratic Idle

[BigCity]

Hello,

I had similar high idling problems. After replacing the IMG and still experiencing high idle I replaced the o rings on the fuel injectors. $20 for the O-ring kit and a couple of hours under the hood.

[trooperbc]

Originally Posted by BigCity

Hello,

I had similar high idling problems. After replacing the IMG and still experiencing high idle I replaced the o rings on the fuel injectors. $20 for the O-ring kit and a couple of hours under the hood.

that's a good tip. what led you to do that?

//bc

[Jdm914]

I did the injector o-rings when I replaced the intake gaskets. Thanks for the suggestion!
I think I might have found the problem with the idle. It looks like there might be a considerable air leak at the input butterfly shaft in the common chamber. I will need to remove the intake manifold and inspect!

[BigCity]

I read on this board about spraying carb cleaner around the manifold to check for leaks. I did the same for my injectors and RPMs went up on one injector. This was after I took my Rodeo to a new Hyundai dealer in town who displays an "Isuzu Repair" sign. Anyway, they told me they would replace one of the injectors and the gaskets for $800! Needless to say I did it myself.

I am suprised at how easily grit and dirt can accumulate around those injectors. No wonder they eventually leak.

[H2odrx]

how are the grounds on the tranny and engine?