Misfiring xj - JeepForum.com
 
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post #1 of 7 Old 05-02-2013, 10:06 AM Thread Starter
T_force29
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Misfiring xj

I washed my engine bay last night, and this morning my jeep is misfiring at first it was a real low idle then that fixed itself and now In park it idles at 1100 and that is when I heard the misfire. Any suggestions?

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post #2 of 7 Old 05-02-2013, 11:24 AM
CJ7-Tim
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Use some WD-40 and flush out all the wire harness wire plugs, and inside the distributor cap. If the misfire continues, the water has probably ruined the Throttle Position Sensor (TPS). If you buy a new TPS buy it from Jeep.

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post #3 of 7 Old 05-02-2013, 05:32 PM
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I agree with Tim that the throttle position sensor is suspect. They HATE water.

I generally don't recommend washing the engine bay unless you cover all electronics appropriately and even then you have to be careful......

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post #4 of 7 Old 05-02-2013, 05:46 PM Thread Starter
T_force29
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Quote:
Originally Posted by CJ7-Tim
Use some WD-40 and flush out all the wire harness wire plugs, and inside the distributor cap. If the misfire continues, the water has probably ruined the Throttle Position Sensor (TPS). If you buy a new TPS buy it from Jeep.
I think it fixed its self the check engine light is off and it doesn't seem to be misfiring anymore. So I'm assuming that water dried up. What do you think? And thanks for the advice.
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post #5 of 7 Old 05-02-2013, 05:48 PM Thread Starter
T_force29
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Quote:
Originally Posted by tjwalker
I agree with Tim that the throttle position sensor is suspect. They HATE water.

I generally don't recommend washing the engine bay unless you cover all electronics appropriately and even then you have to be careful......
Yeah next time I'm just going to used a damp rag and wipe it down, to many problems with using a hose to spray it down. Thanks for the input appetite it.
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post #6 of 7 Old 05-02-2013, 08:13 PM
Hudson
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Quote:
Originally Posted by T_force29 View Post
I think it fixed its self the check engine light is off and it doesn't seem to be misfiring anymore. So I'm assuming that water dried up. What do you think? And thanks for the advice.
Did you pull the codes to see what it was saying was wrong or no?

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post #7 of 7 Old 05-03-2013, 10:26 AM Thread Starter
T_force29
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Quote:
Originally Posted by Hudson

Did you pull the codes to see what it was saying was wrong or no?
No I didn't I thought It was fixed since the light went out and didn't seem like it was misfiring but now today the light is still out but it seems like it might be misfiring still. When I hit the gas it sometimes feels like it hops for a second
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