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Help with high idle box


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Built the high idle bomb box and when ever I hook the box up truck goes into 3 cyc high idle and temp gauge doesn't work I know the wires coming into the cab work like normal when I twiste them together so it the box that's wrong I'll get a picture up soon of it

I used 1/8 watt 3.3 , 39 and 56 bought everything prowled had pictured in his CF thread. Any help thanks guys

--- Update to the previous post...

http://i926.photobucket.com/albums/ad109/Beanerwolfe55/image.jpg

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Ok... First off I let you know that Prowelder has his own group listed here...

http://forum.mopar1973man.com/group.php?groupid=6

As for your problems...

It sounds like you got a few things hooked up wrong... Take the plug on the ECM side of both the coolant and the intake air temp leads and then take a digital voltmeter and measure the ohms on the ECM plug. Then toggle the switch the line should go open (inifinite ohms).

ECT lead should show at the ECM 3.3K ohms and open.

IAT lead should show at the ECM 39K ohm or 56K ohms and open.

Then change up your diagnostics... Take both ends sensor and ECM ends and probe both pins one on each side. On the OPEN position of the switch in the previous test both ends should be a direct short or 0 Ohms.

Check to see if you got the plug end on the right leads...

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  • 2 weeks later...

Mike is right one. You need to do a simple test and see what your ohms are looking like. It's sooo hard to tell what is going on inside that box with everything the same color..... Since your coolant gauge isn't working, I'm saying you have something funny with your ECT harness, like it is always on.... Could you take a picture of the whole system so we can see where the wires are going to the plugs?:shrug:

This might help you a little bit:

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