code 4 ?!?!?!?!?!?!
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New User
Joined: Jan 2003
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From: hockeytown
code 4 ?!?!?!?!?!?!
here is a new one. 94 bronco 302 e40d 4 wheel abs. after the thuck sits for a while (hot outside or cold outside) truck will idle high for a few seconds around 1500 rpmsthen it drops below 500 rpms shoots back up and the check engine light will flash 4 times. any ideas on what this is. i hooked up a matco determinator scanner and came back with a code 11 all good..
thanks
thanks
Elder User
Joined: Aug 2004
Posts: 646
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From: Derbyshire, UK.
what happens after this? does it idle high all the time?
Maybe start checking the IAC controller on the throttle body - is it stuck open thus causing a high idle speed?
When you scanned it was the KOEO or KOER?
Maybe start checking the IAC controller on the throttle body - is it stuck open thus causing a high idle speed?
When you scanned it was the KOEO or KOER?
Senior User
Joined: Oct 2005
Posts: 125
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From: South Carolina
This may not be what you mean, but when you first turn the engine on I get a 4 as well, which i was told means it found a V8 engine, 3 for V6 etc. then it will rev the engine a minute or so then start out putting your codes.
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autx790 is correct, the first flashes during your KOEO test is your engine identification code. four flashes means you have a V8
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It also means that somehow the EEC computer believes that it is being put through the KOEO test every time you start it. Thats a problem. I'd check the test connector and the wiring harness to it. The KOEO test can be administered by simply jumping the correct pair of terminals in the EEC test connector together. It may be that somehow these two terminals or the wires to them have shorted. Otherwise I am unaware of any reason why the light would flash at all during normal operation in other words without the EEC test terminals jumped together).
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codyW
2.6, 2.8, 2.9, 4.0 & SOHC 4.0 V6
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Dec 18, 2004 12:41 PM
