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Check engine light?

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  #1  
Old 10-16-2004, 01:27 PM
BigGatorMike
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Check engine light?

I have a problem. My check engine light is on and my 4.2L F150 is running a little rough. I took it to AutoZone to have the guy plug in his diagnostic code reader under the dash. He got no signal so I took it over to Advanced Auto Parts and the man there also got no reading. Has anybody ever had this happen? Suggestions would be apreciated.
 
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Old 10-16-2004, 01:37 PM
doulos
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check engine light

Mine's doing that right now. I got a code read though. Turns out 2 of my cylinders are misfiring. I checked in the manuel and it says that a steady check engine light means exhaust problems. Might go have your exhaust checked out.
 
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Old 10-16-2004, 04:59 PM
BigGatorMike
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update

Well I guess sometimes there are simple solutions. The reason the diagnostic tools wouldn't read the codes is because the outlet under the dash the tool plugs into is on the same circut that the cigar lighter is on and the fuse for that circut has been blown for some time.
 
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Old 10-16-2004, 11:46 PM
doulos
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well that might help lol also check your O2 sensor
 
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Old 10-17-2004, 05:17 AM
F150ownz
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sounds to me like just a simple engine missfire. O2 sensors wouldnt make it run rough just lean or rich. check or clean the throttle body, IAC and see if any gunk is on the MAF
 
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Old 10-17-2004, 09:46 AM
nasa-hvac
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iac, and maf ????

for us dummies, what is a iac and a maf????
 
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