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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

89 351W stalling

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Old Aug 1, 2013 | 02:12 PM
  #1  
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kevin206
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From: McMinnville, TN
89 351W stalling

I have a 89 F250 351W FI 5 speed with a stalling problem. With the truck fully warm I can drive down the road, under a load and not coasting, I let off the throttle and push in the clutch, the RPM drops to the point of stalling. This is most noticeable, and most problematic, when slowing down to make a right turn.

It's not really a new problem, but it's getting aggravating...and dangerous. I've pulled the IAC twice and cleaned it and the passageway very good, even though it looked clean anyway. The check engine light isn't on and it's not shown any codes when I've pulled them. A known issue is that the metal tube from the manifold to the EGR is broken.

Any ideas or suggestions are appreciated.
 
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Old Aug 1, 2013 | 03:20 PM
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Replace the EGR tube....
 
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Old Aug 1, 2013 | 03:53 PM
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From: McMinnville, TN
Originally Posted by rla2005
Replace the EGR tube....
Would that be the fix for my problem? I ask because my other truck developed a broken EGR tube and it didn't seem to cause any driveability issues.

The tube is on the fix-it list. I've neglected it simply because of the time it will take and the aggravation it will cause.
 
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Old Aug 1, 2013 | 04:24 PM
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Fuel filter? Fuel pressure regulator? Fuel pump? Even a weak battery and/or alternator can cause similar issues at lower RPMs.
 
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Old Aug 1, 2013 | 05:27 PM
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With the EGR tube broken you have air into your intake the engine isn't aware of. Once that is fixed, assess the situation and if something else is throwing off the motor, you'll find it.
 
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Old Aug 1, 2013 | 05:47 PM
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Originally Posted by kevin206
Would that be the fix for my problem? I ask because my other truck developed a broken EGR tube and it didn't seem to cause any driveability issues.

The tube is on the fix-it list. I've neglected it simply because of the time it will take and the aggravation it will cause.
Fix what you know is wrong before speculating on other causes of an issue. Otherwise you end up throwing $money$ at the problem until your wallet is empty.
 
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Old Aug 1, 2013 | 06:08 PM
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From: Hamilton, Ohio
Ignition module on the dizzy might be bad.
 
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