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Check engine light after head gasket repl.

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Old 05-07-2012, 08:46 PM
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Check engine light after head gasket repl.

Hello all, new to this forum but have an 87FE non-turbo that I just changed the head gasket on. The check engine light was not on before the need for the new gasket, but now it is on. The engine runs pretty well now, except that it is a little rough around idle and the light, it smooths out with acceleration and at speeds greater than idle. I have checked the timing, it has recent new injectors, and I have replaced all the vacuum hoses with fresh rubber to no avail. Any Ideas?
Old 05-07-2012, 10:05 PM
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first idea would be to check what code it is throwing
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Old 05-08-2012, 01:05 AM
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Originally Posted by fork
first idea would be to check what code it is throwing
Old 05-08-2012, 07:42 AM
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Where is the best place to get a reader for this rig? Thanks for the input so far.
Old 05-08-2012, 07:49 AM
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A paper clip will work or small wire. Jump TE1 and E1 and count the number of flashes and look up the codes. You will need the codes for 85-87. 88 and up use different numbers.

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85-87 Codes

Code 1 System Normal
Code 2 Airflow meter signal
Code 3 Ignition Signal
Code 4 Water Thermo Sensor
Code 5 Oxygen Sensor Signal
Code 6 RPM Signal
Code 7 Throttle Positon Sensor Signal
Code 8 Intake Air Thermos Sensor Signal
Code 10 Starter Signal
Code 11 Switch Sigal
Code 12 Knock Control Sensor
Code 13 Knock Control CPU
Code 14 Turbocharger Pressure

Last edited by Terrys87; 05-08-2012 at 08:03 AM.
Old 05-08-2012, 08:34 AM
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Count the number of flashes? What flashes when you jump the pins?
Old 05-08-2012, 08:44 AM
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The check engine light flashes.
You just turn the key on after you connect the jumper. don't start the engine.
To clear the code, just remove the EFI fuse on the mail fuse box.
Old 05-08-2012, 10:27 AM
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Thanks for all the info, it turns out that I missed the knock sensor wire, it is all better now...
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