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4.9 Iac problems

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Old Oct 15, 2010 | 07:14 PM
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Originally Posted by jodaddy
Got the relay connected and the fuel pump is making noise but now it won't start. Turns over fine just won't catch.
Got spark?
 
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Old Oct 15, 2010 | 08:49 PM
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Ok she's running again. time for some more codes I guess.
 
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Old Oct 15, 2010 | 09:29 PM
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koeo 11 13 34 nothing new here. koer 33 25. 33 says egr isn't opening which makes sense since 34 code said the evp or pfe failed closed. 25 is something about knock not being sesnsed. That sounds like a good code to me.
 
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Old Oct 15, 2010 | 09:52 PM
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I'd disconnect the battery for 5 mins. to clear the KAM. Forget about the #25. Test error.
 
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Old Oct 16, 2010 | 05:03 PM
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Ok so I found that I have no voltage to the ect but when I pull the connector the cel comes on.
 
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Old Oct 16, 2010 | 05:10 PM
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Originally Posted by jodaddy
Ok so I found that I have no voltage to the ect but when I pull the connector the cel comes on.
I thought you said disconnecting the IAC at warm idle, effected the idle?
 
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Old Oct 16, 2010 | 05:21 PM
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It changes the idle but not a lot. new iac does the same.
 
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Old Oct 16, 2010 | 05:21 PM
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I show 11.3V w/ key on. It's difficult to make contact to the connectors w/ the probes. I think that's your problem.
 
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Old Oct 16, 2010 | 08:09 PM
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4.6v key on
 
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Old Oct 16, 2010 | 08:31 PM
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Originally Posted by jodaddy
4.6v key on
That sounds like a sensor voltage. Testing the two wire IAC connector? Try going to ground from the connections w/ key on. http://www.fordfuelinjection.com/?p=39
 
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Old Oct 16, 2010 | 09:12 PM
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8 volts at iac. Just saw some arcing by the coil.
what does that mean?
 
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Old Oct 16, 2010 | 09:16 PM
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Originally Posted by jodaddy
8 volts at iac. Just saw some arcing by the coil.
what does that mean?
While you were doing what?
 
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Old Oct 16, 2010 | 09:19 PM
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I was checking voltage koeo plugged iac back in and started her up still had the hood open and saw the sparks between the coil body and insulator.
 
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Old Oct 16, 2010 | 09:26 PM
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Originally Posted by jodaddy
I was checking voltage koeo plugged iac back in and started her up still had the hood open and saw the sparks between the coil body and insulator.
I can't really see it from my house!
 
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Old Oct 16, 2010 | 09:41 PM
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Originally Posted by jodaddy
I was checking voltage koeo plugged iac back in and started her up still had the hood open and saw the sparks between the coil body and insulator.
It's ain't good! From the coil HV output to the Dist., at the coil connection end?
 
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