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post #1 of 8 Old 08-06-2010, 02:50 PM Thread Starter
SWDoodle
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MAF sensor

Question is "where is it at"? Do they even have one on the 4.0L's? I am suffering from poor mileage and figured I'd start with the basics. Changed plugs, cleaned filter, etc. I know that they recommend cleaning the MAF sensor but I can't seem to find it on the Jeep. Any suggestions? Only thing I've come across is the Idle air control valve.

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post #2 of 8 Old 08-09-2010, 03:51 AM
freakinheep89
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there is no MAF on any jeep, except maybe the new motors(3.7/5.7 hemi) im not sure about them. but on any jeep 05 and down there are no MAF sensors. if your getting crappy mileage, welcome to Jeeps. best thing to do is to check for codes, see if one of your O2 sensors is acting up or something.

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Originally Posted by slayercr23 View Post
How would i go about Stroking it?
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post #3 of 8 Old 08-09-2010, 07:18 AM
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No, but there is a MAP sensor, TPS sensor.

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post #4 of 8 Old 08-09-2010, 11:29 AM
sdavisbone
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and IAC valve.... that's what is usually recommended to clean. They are all on the throttle body.
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post #5 of 8 Old 08-09-2010, 02:43 PM
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Is your check engine light on? If so with vehicle off and turn key to run position and then off three times in a row ending in the run position and watch your odometer for the codes stored. a bad O2 sensor will make it run extremelly rich and get around 5.2 miles per gallon!
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post #6 of 8 Old 08-11-2010, 02:17 PM Thread Starter
SWDoodle
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Quote:
Originally Posted by sdavisbone View Post
and IAC valve.... that's what is usually recommended to clean. They are all on the throttle body.
How do you clean the IAC valve? Can you clean it with the MAF sensor cleaner? Where exactally is it located on the 4.0L?
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post #7 of 8 Old 08-11-2010, 02:31 PM
sdavisbone
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It's on the back of the throttle body. Not positive, but I bet you have a MAP sensor, instead of MAF.... pressure rather than flow. Map is on drivers side of throttle body.
Search terms IAC and clean. Someone did a great write up with pics. That should help.
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post #8 of 8 Old 08-11-2010, 03:12 PM
freakinheep89
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yes there is a MAP sensor on it, on the throttle body like ^ said. if you want better mileage i would change more than just the plugs, go ahead and replace the coil, and the plug wires, also the dist cap and rotor. its a good investment

TJ-
95 ZJ 5.2- D30/XJ shafts/D35 Yukon alloys,249, 2"BB, 30x9.5"Wildcat EXT,lots of motor mods, rancho shocks & stabilizer.

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How would i go about Stroking it?
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