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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

couple engine problems, possibly all related.

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Old Apr 22, 2011 | 12:06 PM
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couple engine problems, possibly all related.

Truck is a 89 f250 351 zf tranny. We were having issues with the truck wanting to die when releasing the clutch so we took it and had a new slave cylinder and clutch kit installed. This helped the drive-ability some but its still not right. When letting out the clutch I have to be overly light with it and feather it or the truck wants to die. I also feel like the rpms have to be higher than usual to take off also. The other thing is at stoplight the truck rocks back and forth. It has a cam but I drove it for a year and it never rocked like this. So what do you guys think it is? IAC? Timing?
Thanks
 
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Old Apr 23, 2011 | 06:17 PM
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Anyone? I think this should be something simple I just don't know where to start.
 
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Old May 27, 2011 | 06:10 PM
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one more time...
 
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Old Jun 1, 2011 | 08:24 PM
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Have you checked for codes in the computer? It might not tell you exactly what's wrong, but may give a general direction of where to start looking.
 
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Old Jun 1, 2011 | 10:33 PM
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i had some what of the same problem with my automatic truck it was the timing just a good idea to check that, that can mess up your whole driveablity. Or check for leaks around the intake/vaccum area one open vaccum port can be alittle problem that can throw the whole motor off.
 
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Old Jun 1, 2011 | 11:28 PM
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I would also start by checking for vacuum leaks. How much vacuum does it pull at idle?
 
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Old Jun 1, 2011 | 11:38 PM
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I'm pretty sure it's a sensor, try the IAC or TPS, but before anything else, check for codes, that's usually the faster way to point at the cause.
 
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