Maxspeed

I had posted about an idle problem on my 91 Limited 4.0L. After installing new 4 hole injectors I began having an idle problem where the idle would run steady for 10 seconds then rev up 500 RPM then immediately drop back to a somewhat normal idle. I had the Jeep tested at the emissions center where it failed miserably. I did as suggested and cleaned the Air Control motor, throttle body and everything connected to the idle system. After all this testing and cleaning my solution was simple. I replaced the new 4 hole injectors with my original ( Simmens 33007127) single hole injectors. Idle problem fixed,, emissions testing passed. Learned a lesson. Don't but cheap injectors even if they claim to be a name brand with the correct numbers on them. Thanks for everyone's help. And I hope this will help the next person that gets suckered into buying something that isn't what it;s supposed to be.

cruiser54

Get your injectors from jhc7399 here on Cherokee forum.