1995 Ford Explorer ECM codes

IYAOYAS_AO

MEMBER
1995 FORD EXPLORER
6 CYL
4WD
AUTOMATIC
133,000 MILES

I bought a 1995 ford explorer and I recived a check engein light after two days of ues. When I put on the test set, it gave's me the codes for three items. 1. O2 #1 running lean, 2. O2 #2 running lean, 3. CAM sensor. I first strart with the the O2 sensors and changed them out. Ran the truck again and had the same codes pop up. Checked the wire to see if there was any breaks or rusted connection and found out that they all have good contacts and continuity. So I checked the ecm and found out that the box had dirt in it. Changed out the ECM and now I have two new codes. The first three codes and went away and now the two new codes are these. 1. O2 sensor runs rich and the Mass Air Flow is out of adjustment. Opened up the MAF compartment and it was dirty. Did a quick clean and ran the test for the ECM again and the same two codes come up again. I am thinking I have a bad computer. Because when I did a running test (computer hooked up to the ECM and drove on the freeway. The O2 sensor ran in limits). And ideals?

9 Replies

JAMES W.

MECHANIC
2,394 POSTS

The new computer you installed, was it new, used, or rebuilt? If used, was it for the same model/year, or part #? Even with the check engine light on, how does it run otherwise? Please advise.

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Tuesday, November 18th, 2008 AT 7:34 PM

IYAOYAS_AO

MEMBER
11 POSTS

The computer is used (from a auto yard) did a "wipe/reset" of the coputer to get rid of the histroy codes. Ran the truck with the computer to see where the O2 sensor was doing and still the same thing. Trying to replace the #2 O2 sensor and clean out the MAF. If this doesn't work then replace the MAF sensor and the computer again. The yard has more computers for me. Worst case get a new computer form Kragen.

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Saturday, November 22nd, 2008 AT 2:45 PM

IYAOYAS_AO

MEMBER
11 POSTS

Ok the codes have cleared and now every once in awhile the check engine light will come on the go off. The truck runs fine now with no problems but as I said the light comes and goes. *** But now this morning the truck will not crank over. I started the engine and as soon as it started to turn over I let go of the key. Too soon and the ruck died. When I tryed again the truck will crank but not start. The battier gage is in the low. But I have power for the dome light a and the dash board lights.

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Friday, January 9th, 2009 AT 12:41 PM

IYAOYAS_AO

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11 POSTS

Ok further troubleshooting show that I am not getting a spark to the distrupitor. I did have a code at the start for the cam relay? I am woundering is that the reason my check engine light keeps going on and off. Am I on the right track?

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Friday, January 9th, 2009 AT 5:07 PM

JAMES W.

MECHANIC
2,394 POSTS

On a Ford, an intermitent CEK is usually caused by a lean condition that comes and goes. Check the large rubber tube connections at the intake manifold and the valve covers to see if they are rotted out.

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Friday, January 9th, 2009 AT 6:49 PM

IYAOYAS_AO