Running rough... making me crazy
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Joined: Oct 2004
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From: Salisbury, MD
Running rough... making me crazy
Hello all. I have a 92 with a 3.0L and its been running rough for about a week. I had to replace the alternator a few days ago and havent had time to do much else. Today I figured I would go to auto zone and have them pull the codes for me. Well...... I called first to see if they could do it for my 92 and they said yes. When I got there they stated that the reader didnt work and that I should have called first. (gotta just laugh or I might cry)
Then I went to the auto zone down the road and they couldnt find theirs. After pushing them a little, they miraculously found it. They pulled a bunch of codes and all were two digit. I suspect something was read wrong... am I right? He told me that they were 11,12,15,54,72. I have cleaned the MAP sensor, replaced the fuel filter, and I'm getting ready to replace the fuel regulator and the clock spring. Any ideas would be greatly appreciated. Should I try resetting the computer since I replaced the alternator? I love my aerostar, but this is making whats left of my hair fall out...lol. Oh yea, I also smelled the infamous "egg" smell today. Would a bad cat throw codes too? and make the engine rough like that? Thanks
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New User
Joined: Oct 2004
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From: Salisbury, MD
Update on rough idle and rough running...
ok... I just spent the last 30 min. looking for vacuum leaks and found a wire at the front of the engine, right to the right of the new alternator. It is a small wire with an end that looks like a spark plug boot. At first I thought I left a wire off the alternator, but found nothing. The wire connects to a larger harness that runs to the passenger side of the motor. I could have knocked it off when i was replacing the alternator... it was dark and i was plenty ticked off at the time...lol
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Idle air control valve. ON a 3.0 it is on the top left front of the intake manifold.At idle it works as a controlled vacuum leak to allow air in when the throttle blade is closed. They go bad sometimes and cause a rough idle.
Last edited by whynot; Nov 8, 2004 at 08:08 PM. Reason: misspelling
Thread Starter
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New User
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From: Salisbury, MD
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How long since it had new plugs?
Can you take a look at it running in the dark? When I did this I found my coil, plug wires wires & cap leaking spark.
It was running like you describe. I replaced all those parts and the plugs and now it runs like new . I also replaced the fuel filter and did an oil change at the same time.
Can you take a look at it running in the dark? When I did this I found my coil, plug wires wires & cap leaking spark.
It was running like you describe. I replaced all those parts and the plugs and now it runs like new . I also replaced the fuel filter and did an oil change at the same time.
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