98 TJ Check Engine Light - problems - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 07-21-2003, 09:18 AM
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98 TJ Check Engine Light - problems

So I'm guessing I'm going to need a reader for a 97+ TJ? I tried the on/off 3 time thing like we could do with the older wranglers but with no success. How do I get the codes- Dealership? Another think the problem has something to do with the idle running high- it doesnt come down past 1200-1500 rpms...? And yes I've been in some DEEP water crossings. I did not suck up anything into the engine, but the whole engine compartment was covered. Anyone have any answers/directions.
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post #2 of (permalink) Old 07-21-2003, 09:32 AM
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Re: 98 TJ Check Engine Light - problems

1. Check the TPS.
2. Pull and clean the Throttle Body and...
3. Pull and clean the AIS motor.
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post #3 of (permalink) Old 07-21-2003, 10:07 AM
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Re: 98 TJ Check Engine Light - problems

I figured it was the TPS? but I wasn't sure. Leve you can't check codes on a TJ without a Reader right?
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post #4 of (permalink) Old 07-21-2003, 10:36 AM
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Re: 98 TJ Check Engine Light - problems

1. You can test the resistance.
2. All the TPS is is a sealed variable resistor.
3. Using an analog meter is best,
4. Check the TPS resistance,
5. And how smoothly the wiper in the variable resistor is working.
6. If the transition is not smooth, there's a problem.
7. If it's smooth, likely it's OK.
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post #5 of (permalink) Old 07-21-2003, 11:24 AM
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Re: 98 TJ Check Engine Light - problems

Don't need a reader on my 97' on, off, on, off, on,...works on mine...
John
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post #6 of (permalink) Old 07-21-2003, 12:18 PM
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Re: 98 TJ Check Engine Light - problems

97 was the last year they used the On/Off thing so I've heard? Leve what do you suggest to use to clean out the sensors on the TB?
post #7 of (permalink) Old 07-21-2003, 02:21 PM
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Re: 98 TJ Check Engine Light - problems

ttt
post #8 of (permalink) Old 07-21-2003, 03:49 PM
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Re: 98 TJ Check Engine Light - problems

1. I think you're right about the 97 to 98 change in the Key recovery.
2. For cleaning the Throttle body, all I use is simply Wal-Mart Carb Spray Cleaner.
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post #9 of (permalink) Old 07-21-2003, 08:15 PM
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Re: 98 TJ Check Engine Light - problems

But leve is it Sensor Safe? I always heard to becareful spraying around the throttle body because of those two peices? So disassemble them from the throttle body and clena them out?
post #10 of (permalink) Old 07-21-2003, 08:31 PM
 
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Re: 98 TJ Check Engine Light - problems

Autozone will decode for free!!

I went into some DEEP water too a while back and the TPS went on mine, I had the codes read at Autozone and they got me the TPS for like $55 or somthing.

Phil
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