97 f250 idles rough has no power - Ford Powerstroke Diesel Forum
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post #1 of 14 Old 07-08-2012, 04:06 PM Thread Starter
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97 f250 idles rough has no power

went to fuel up my 97 f250 220,000 miles starts fine idles rough not enough power to drive over 10 mph
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post #2 of 14 Old 07-08-2012, 05:37 PM
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I'd start by unplugging the connectors to the valve covers and looking for burnt plug and pins

Mike 1997 F250 totaled 11/19/12
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post #3 of 14 Old 07-15-2012, 07:46 AM Thread Starter
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i unplugged the 4 connectors (2 on each side) they appear fine dont smell burned this is something i would like to try and fix myself but parts are so expensive just want to be sure thats really the problem
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post #4 of 14 Old 07-15-2012, 07:49 AM
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Are you throwing a check engine light? any other indicator lights on?


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post #5 of 14 Old 07-15-2012, 08:13 AM Thread Starter
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no check engine light or any other kind of warning
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post #6 of 14 Old 07-15-2012, 09:23 AM
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Under no load, sitting in the driveway in neutral or park, does it rev up normally?
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post #7 of 14 Old 07-15-2012, 04:57 PM Thread Starter
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no it definately doesnt i can put it to the floor and it barely will rev up
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post #8 of 14 Old 07-22-2012, 02:36 PM Thread Starter
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i pulled the valve covers off tested all 4 plugs that feed the glow plugs and injectors have good continuity through all of them including the cover gasket plugs im at a total loss i wonder if it could be the throttle positon sensor (i think thats what its called) or the cam position sensor
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post #9 of 14 Old 07-22-2012, 02:38 PM Thread Starter
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also forgot to say the glow plugs all read .1 ohms
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post #10 of 14 Old 07-23-2012, 01:06 AM
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Quote:
Originally Posted by scott1141 View Post
also forgot to say the glow plugs all read .1 ohms
Well that's def. wrong. They should all be aprx. 1.0 ohm. Too low resistance means too high current. Still doesn't explain your performace problem. But just to be sure, have checked to see if it behaves any differently after the glow plugs cycle off?

The pedal position sensor (that's what it is, since our trucks don't have a "throttle") could be the issue. If you have access to a scanner that reads real-time data on our trucks, you can see what the sensor is feeding the PCM. There's also a manual test with a voltmeter; perhaps someone else will chime in with the procedure.
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