early 99 engine into a 2002 truck, check engine light with no codes? - Ford Powerstroke Diesel Forum
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Old 01-14-2013, 06:54 AM
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early 99 engine into a 2002 truck, check engine light with no codes?

Hey guys, I swaped an engine from an early 99 truck into a 2002 chassis and now I always have a check engine light. There are no codes though, at least with the code reader I am using. I am using the stock 2002 computer. The engine seems to run well without any problems.

What could cause the check engine light?
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Old 01-14-2013, 08:54 AM
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Before you actually start the engine, when you turn the key to on, does the light come on for a second, then turn off? Or is it on the entire time?
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Old 01-14-2013, 09:24 AM
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I think it's on the entire time. Doesn't a check engine light normally come on when you switch to run then stay on until the engine is running?
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Old 01-15-2013, 08:40 PM
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If I remember correctly, when you turn it on, it should light up, then when you start it, it should stay on for a second, then turn off. Then if there are problems, it should light back up. I need to go out and see what mine does. I know that they are supposed to turn on with the key as a way for smog techs to know that the light works and you just didnt take out the bulb. I've see that more than 1 time working there.
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Old 01-22-2013, 09:49 AM
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Does anyone have any insight on this? How can I scan to find out why the light is on?
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Old 01-22-2013, 12:05 PM
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Re: early 99 engine into a 2002 truck, check engine light with no codes?

Did you use the intake spyder from the E99 trk? If you did, the lack of intake air heater could set a code... need more details on what was used from the later motor or older one.


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Old 01-22-2013, 12:32 PM
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The entire 99 system was used, so there is no intake air heater. Should that code show up with a regular scanner? I am not seeing any codes.
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Old 01-23-2013, 12:16 AM
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A lot of scanners won't read the codes on our trucks. You may have to go to continuous memory to see the codes. AIH is a soft code, won't set cel. Is the WTS light coming on as usual?
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Old 01-23-2013, 05:07 AM
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The wait to start light comes on and does seem to work properly. Truck starts well, even in the cold. How do I go to the continuous memory for the codes? What scanner do I need?
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Old 01-23-2013, 11:24 AM
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The one at oriellys can do it if you go to the continuous memory test, its usually with the koeo and koer tests. I was asking about wts light to make sure the pcm isn't fried and just throwing the cel.
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