500 MJ Posted December 16, 2010 Share Posted December 16, 2010 Does anyone have any details on how to test an IAC valve? I've looked in my '89 FSM and can find nothing. I've got a bunch of them sitting in a box and I want to know which ones are good/bad for obvious reasons, I've also acquired a '94 ZJ with the 4.0L and would like to test the one it has as well, however it is slightly different than all of the Renix MJ ones I have, 4 pin plug looks to be the same though... Plan on cleaning the TB this weekend to see if that helps clean up the rough idle, probably needs other tune up parts replaced too. I've got a 12V battery in the shop to use to test it, I just need to know which pins to put voltage to... Link to comment Share on other sites More sharing options...
HOrnbrod Posted December 16, 2010 Share Posted December 16, 2010 Page 66 gives the pinouts: http://www.pirate4x4.com/tech/billavista/PDFs/Jeep_Renix_Fuel_Injection_manual.pdf Link to comment Share on other sites More sharing options...
MJCARENA Posted December 16, 2010 Share Posted December 16, 2010 I think the best way would be to install them and run the engine. Link to comment Share on other sites More sharing options...
500 MJ Posted December 17, 2010 Author Share Posted December 17, 2010 Thanks for that link Don, nice document to have handy. I guess I'll just test them on the truck, seems to be the only way. Looks like I'd need the super duper tester otherwise... Link to comment Share on other sites More sharing options...
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