Dking

i have a xj auto 4.0l with 152,000
check engine light come one so i run it and its the map sensor so i replace it. but my jeep still cuts off when i start it or put it in drive or revers. light is still on it jerks and cuts off the frist 10 min. of drive and it fells like it haves something to do with the fuel or something idk
here is what i have changed

- both 02 sensors
-fuel pump
-tune up
-map sensor
-crank sensor

need help

Bustedback

What was the code? And a code does not tell to replace a sensor, it tells you that something is out of spec and what sensor is reporting a problem. They're more like clues than they are codes.

tjwalker

Is there still a check engine light?

Post the EXACT code here for the most accurate replies.

If it is a map sensor code, there are other things besides the sensor itself. Wiring, connector, vacuum lines, etc.

Dking

there are two

p1296 no 5 volt to map sensor


p0107

map/baro metric crkt low input

tjwalker

This is your problem. You do NOT have any power going to the map sensor. There should be 5 volts going to this sensor and there isn't.

You could verify this if you want with a meter, but dollars to donuts, the power isn't there.

Your job is to start tracing back from the connector through the wiring to figure out where the open in the circuit is.

This is almost assuredly your problem.

fishtaconc

Fuel Filter? Just a suggestion, but I would check the fuel pressure at the rail to rule out delivery issues. You can rent the gauge advance or auto zone with a refundable deposit

Dking

i have a brand new fuel pump and i have check that its all good thank you


and i will start tracking back for the map sensor thank you.

i so tired of spending money and it not going away

tiwvr1

if u cant find anything, it is prob the comp. That is what supplies the 5 volts to the map.

tjwalker

Inspect the connector for that map sensor and every inch of wiring.

Until you get power TO the map sensor, you're hosed. It will not work without 5 volts and it is a critical engine management sensor.

Dking

I will trace the problem this weekend and let you know thanks for they info

xj.kinda.girl

Check your tps and your iac motor. Spray carb cleaner in your iac see if that helps. Also check your battery voltage.

ken72

TJwalker is right on this one. Your power is not getting to the map. Check the wire harness real well. Make sure there are no loose wires in it. Check your fuse pannel too. I dont know if there is a fuse for it but its worth a shot.