Help! 92 xj dies after it warms up???

A

avocado

NAXJA Forum User

Location

Portland Oregon

• Mar 23, 2013

• #1

I was having issues with idle and got some ideas naxja friends so I replaced the TPS and Idle seems better but it still dies after it warms up... My brother mentioned it could be the coolent temperature sensor?? Any comments on that??

thanks, Mike(avocado)

 

Ecomike

NAXJA# 2091

NAXJA Member

Location

MilkyWay Galaxy

• Mar 23, 2013

• #2

O2 sensor may have lost power to the internal heater (fuse or relay bad?), or the heater is bad in the O2 sensor. When the engine warms up and switches from open loop to closed loop control it uses the O2 sensor, and if the sensor gets cold at idle (heater not working), the ECU over compensates trying to use the bad O2 sensor data, and that can stall the engine.

You can test the CTS, MAT and the O2 sensor with a simple volt-ohm multi meter. The MAT is the manifold Air intake temp sensor. Also thhe IAC may be dirty and sticking. Idle Air Control valve.

 

D.I.T.A

NAXJA Forum User

Location

Malboro NJ

• Mar 24, 2013

• #3

I was having the same issue with my xj and it was the CPS. Does it restart right after it stalls ?

 

A

avocado

NAXJA Forum User

Location

Portland Oregon

• Mar 26, 2013

• #4

It does not start up right away once it dies. I have to wait til it cools down completely. It almost acts as if it gets flooded??

 

A

avocado

NAXJA Forum User

Location

Portland Oregon

• Mar 26, 2013

• #5

The heater is not working so that makes sense if its the O2 sensor but which O2 sensor is it?

 

T

thanasi85

NAXJA Forum User

Location

Sacramento, CA

• Mar 26, 2013

• #6

avocado said:

The heater is not working so that makes sense if its the O2 sensor but which O2 sensor is it?

Click to expand...

Should only be one 02 sensor on your 92, which is the upstream located on the exhaust pipe below where it bolts to the header.

 

blondejoncherokee

NAXJA Member

NAXJA Member

Location

sacramento

• Mar 26, 2013

• #7

my money is on the CPS .
mike meant the heater wire for the o2 sensor, not the heater in your jeep.

Have you looked for any frayed wiring, intake leaks, stuff like that?

 

B

birchlakeXJ

NAXJA Forum User

Location

Melrose, MN

• Mar 26, 2013

• #8

My money is also on the crankshaft position sensor. It is not uncommon for this sensor to suffer thermal (heat related) failure.

Ignition coil is another possibility as well, but crank sensor fails more frequently this way.

 

A

avocado

NAXJA Forum User

Location

Portland Oregon

• Mar 28, 2013

• #9

I talked to the previous owner and he already replaced the cps.... I have talked to a couple different people and am maybe leaning toward fuel issue? I will keep ya'll informed once I get it figured out.... thanks for all the help everyone..

Mike(avocado)

 

Ecomike

NAXJA# 2091

NAXJA Member

Location

MilkyWay Galaxy

• Mar 28, 2013

• #10

Check how hot it is getting too. You can use a hair dryer to heat stress parts like the HV coil and CPS to see if they croak sooner, isolated hot part, cold engine.