Slim357

My Jeep keeps eTing the Map sensor. Iv just been putting new ones on as needed (6-7 so far) and Im tired of waisting money on them. What would cause my Map sensor to go bad so often?

cruiser54

Sure it's not a plug issue or sensor ground issue?

Slim357

Im pretty sure because every time I change the sensor it fixes the issue for a few months. I have tried the old sensors I have saved from everytime I have replaced them and the Jeep acts up with them installed. Iv noticed it happens more so when the engine warms up. It started happening after I flipped in the ditch a while back. Since then I have done 95% of all your write ups. The most recent one being you ground refreshing/replacing as Iv been in alot of water since then.

cruiser54

Done #5, sensor ground test?

Slim357

Iv done the test and have never seen over .5 ohms

cruiser54

Howzabout the reading if you wiggle the MAP harness connector and wiring?

Slim357

No change in ohms stays steady at .5

DFlintstone

Send me a dead one if you want. I'll do an autopsy! A wild guess, the ECU might be over volting it? It must have some sort of pot in it. (potentiometer). One might dremmel the housing open and see if it looks cooked.

cruiser54

Check the input voltage on the red with tracer wire.

Although, I've used Map modifiers that increased imput voltage so the output voltage would be higher and had no issues.

Slim357

Tracer wire? Where can I find the modifier and would it do anything to help with the issue?

cruiser54

Red wire with a tracer color on it TO the MAP should be your input voltage. A little less than 5 volts with the key on.
You don't wanna be messing with signal modifiers at this point, if at all.

Slim357

Ok will check it asap. I wouldnt mess with them unless I understood why it would be useful. I always trust my Renix expert on such issues. Hmm you wanna just come rebuild my Jeep for me man?

cruiser54

All expenses paid?

Slim357

Hmmm depends on how much expenses are. Hows all the beer you can drink sound lol.

DFlintstone

I think he drinks that expensive yuppy stuff. Probably not worth it.

Oh, just because I had it some map stuff. > http://go.jeep-xj.info/HowtoMAPsensor.htm