89 dodge truck starts but dies after awhile

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Dec 6, 2015 | 07:32 PM

rgengelking

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Joined: Jun 2014

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From: springfield mo.

89 dodge truck starts but dies after awhile

i have a 1989 dodge truck, it will start and run but when it starts to warm up the idle will start to drop off and then die. I have replaced the throttle position sensor,mar sensor, injectors, 02 sensor,fuel regulator, and new plugs, can it be electric if you can help thankyou

Dec 8, 2015 | 02:03 PM

TVLynn

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Joined: Apr 2011

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I would start by hooking up a fuel pressure gauge To see what happens when it quits. then check for spark when it quits... Does it have an idle speed sensor at the back of the throttle

Last edited by TVLynn; Dec 8, 2015 at 02:06 PM.

Jan 2, 2016 | 03:42 AM

crwchf16

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Joined: Sep 2009

Posts: 96

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From: Island Pond, Vermont

I have a 1989 W-150 as well and ran into this exact issue. if you turn it off does it start right back up and run for a few minutes before it quits again? If so then I agree with TVLynn, this sounds like your fuel pump is starting to go. How does it idle?