engine light
i have no access to a diagnostics tool and was wondering most common mass air flow and evap isues on the 98 cherokees
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Most common codes are evap system codes, but there are hundreds of OBDII codes that could cause the light to come on. I suggest finding somebody or someplace that can scan the PCM. Just blindly throwing parts at the Jeep and guessing what the cause may be is not the way to handle the problem.
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Could be a zillion things. No MAF sensor on a 4.0. Throwing evap bits at it won't fix an O2 sensor or a transmission solenoid. Get the code read or purchase a reader. (the key trick was discontinued in 98 I believe)
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Gap your plugs to .35 lately? Lot's of places will read your codes free. Trans shops, lube shops, auto parts stores. You might look some more. (We have "MAP"s, instead of MAF's in our Jeeps Btw. :thumbup:)
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Originally Posted by DFlintstone
(Post 2328346)
Gap your plugs to .35 lately? Lot's of places will read your codes free. Trans shops, lube shops, auto parts stores. You might look some more. (We have "MAP"s, instead of MAF's in our Jeeps Btw. :thumbup:)
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Yup, gotta start here with posting the exact code number. With OBD, the devil is definitely in the details.
You will need a code reader or a scan tool. The odometer button technique will not work on a 98. Some parts stores like Autozone will read the codes for free. |
Originally Posted by gullycreeper
(Post 2328235)
i have no access to a diagnostics tool and was wondering most common mass air flow and evap isues on the 98 cherokees
And you don't have a "mass airflow" sensor - Chrysler (and AMC, as well as GM) used the "speed-density" system to measure engine airflow, which uses a MAP and an IAT to calculate are going into the engine. |
Originally Posted by salad
(Post 2328345)
(the key trick was discontinued in 98 I believe)
OP: Try the "key trick" and see if you get a code display on your dash: push odometer reset button while turning key to ON position, but do not start. Release button and observe diagnostic codes, if this trick works on your 98. Let us know what you discover. |
if anything autozone scans for free
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Originally Posted by Jesse Hallum
(Post 2331496)
The "key trick" still works on my 2001; are you sure it was discontinued in 1998?
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The most common evap code I've seen is the gas cap, not having the gas cap on correctly, driving with the gas cap off or a bad gas cap.
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Originally Posted by KD4315
(Post 2331744)
The most common evap code I've seen is the gas cap, not having the gas cap on correctly, driving with the gas cap off or a bad gas cap.
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Originally Posted by DFlintstone
(Post 2331790)
Do you get that off your odometer?
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