1989 Dodge B250 van will not idle in gear.

1989 DODGE VAN
10,000 MILES
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CHENCHOW
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1989 Dodge RAM B250, 318ci, 5.9L V8 idles fine in park, will not idle when put in gear. You have to power brake it to keep it running. ( I had to change one of the fuel injectors on the throttle body and after I did so this started happening.)
Dec 7, 2011 at 11:17 PM
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RASMATAZ
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Backtrack your work-you could have disconnected something electrical-if all okay -check the idle speed control actuator
Dec 7, 2011 at 11:53 PM
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CHENCHOW
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I have also replaced the idle speed control. Also checked all vac lines and electrical. Could this Maybe be a weak fuel pump? As said, the vehicle runs good other than idling in gear.
Dec 8, 2011 at 12:11 AM
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RASMATAZ
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Check the valve and ignition timing
Dec 8, 2011 at 10:03 AM
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CHENCHOW
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Thought I might give you an update...The van is running fine now. I went out today and figured it out. It had to do with the transmission! The neutral safety switch is bad. I unhooked it and jumped the wires and presto, the van runs just fine. I will get a new switch soon. (only $12.00). Thank you all for the ideas and your help. Its a joy to drive now.
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Dec 9, 2011 at 2:00 AM
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RASMATAZ
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Thanks for coming back with the fix. Merry Christmas
Dec 9, 2011 at 7:42 PM