89 W100 truck stumbles and pops/cracks wont run right
#2457740
02/26/18 04:10 AM
02/26/18 04:10 AM
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Joined: Feb 2007
Posts: 658 Dillsburg, PA
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Got this truck about a year now, ran fine no problems. running it every week lately. last week it started to stutter, hesitate and almost backfire under power and wont make power or shuts off. What could it be? truck has 89,000 miles. Throttle position sensor? idle sensor? anything else throttle body related? it idles but you can hear it not ideling correct anymore. Mostly when truck is warm or hot is when problem is bad, it stalls. if cold does not do it as quickly.
wizard
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Re: 89 W100 truck stumbles and pops/cracks wont run right
[Re: Wizard]
#2457760
02/26/18 08:17 AM
02/26/18 08:17 AM
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Joined: Sep 2003
Posts: 7,833 east side of Ohio
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I had an '89 act like that and it turned out to be the fuel pump.
Dave
1981 Dodge D150 360 auto
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Re: 89 W100 truck stumbles and pops/cracks wont run right
[Re: basketcase]
#2457775
02/26/18 10:37 AM
02/26/18 10:37 AM
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Joined: Feb 2007
Posts: 658 Dillsburg, PA
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Brand new fuel pump installed about 4 months ago.
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Re: 89 W100 truck stumbles and pops/cracks wont run right
[Re: buildanother]
#2457790
02/26/18 11:18 AM
02/26/18 11:18 AM
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Joined: Feb 2007
Posts: 658 Dillsburg, PA
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yes, replaced filter. Seems like this only acts up when truck is warm or has been running for awhile.
Last edited by Wizard; 02/26/18 11:19 AM.
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Re: 89 W100 truck stumbles and pops/cracks wont run right
[Re: jerseybud]
#2457991
02/26/18 06:30 PM
02/26/18 06:30 PM
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Joined: Feb 2007
Posts: 658 Dillsburg, PA
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Okay, see if I can limp it into Autobone to check for codes
Guns, God, and Country.
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Re: 89 W100 truck stumbles and pops/cracks wont run right
[Re: Wizard]
#2458017
02/26/18 07:24 PM
02/26/18 07:24 PM
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Joined: Sep 2003
Posts: 7,833 east side of Ohio
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master
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Brand new fuel pump installed about 4 months ago. I had a new pump put in mine....lasted a couple months then acted up again. swapped out a used tank and pump and never looked back.
Dave
1981 Dodge D150 360 auto
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Re: 89 W100 truck stumbles and pops/cracks wont run right
[Re: bbtrux]
#2460560
03/03/18 05:47 PM
03/03/18 05:47 PM
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Joined: Feb 2007
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What do you do to fix this distributor problem if it is what it is? Have not taken to Autobone yet for code reading. Replace whole distributor or is there a part you can replace?
Guns, God, and Country.
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Re: 89 W100 truck stumbles and pops/cracks wont run right
[Re: Wizard]
#2461030
03/04/18 06:56 PM
03/04/18 06:56 PM
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Joined: Sep 2007
Posts: 1,032 Fitchburg, WI
BIGHOOK
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super stock
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Replace the Hall effect pickup plate/coil in the distributor. $20-30. Napa or Rock Auto should have it.
A few years back, had an 88 Ramcharger 4x4, 318 TBI. 70k miles. Same problem. Would just stall after driving, fully warmed up. Sometimes right on the freeway in the middle of traffic! Annoying as hell. Replaced the fuel pump, fuel filter, problem continued. Wait about 15-20 min. after stall then restarts no problem and resume driving. Won't throw any codes. Stumped, I spoke with a Chrysler Tech about it. He said the pick-up coil gets hot and shuts off. Common problem. As I recall, at the time, the dealer parts dept always kept an inventory of those coil pickups on hand. Go figure!
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Re: 89 W100 truck stumbles and pops/cracks wont run right
[Re: BIGHOOK]
#2466296
03/14/18 11:51 AM
03/14/18 11:51 AM
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Okay, will keep this on the lists of fixs. Been getting a few different theorys of what is wrong. Will have to try it. What about Map sensor? Someone mentioned that
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Re: 89 W100 truck stumbles and pops/cracks wont run right
[Re: Wizard]
#2478011
04/05/18 07:48 PM
04/05/18 07:48 PM
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Well, think may have eliminated few things about what is causing this problem.
Don't think its fuel pump as I plowed the driveway full of snow 2 weeks ago. Ran fine for 1/2 hour. Then noticed it was just starting its problem a little bit when I was done plowing. Started to stumble and not run right. I don't think its the fuel pump.
We replaced the throttle position sensor last week, today was the test for it. Ran down town to post office ran okay. Then after about 25 minutes of running it started to act up, hesitant, coughs, not running right. Turned it off for little over an hour and then starts up okay and runs.
Come to conclusion it is acting up when it gets hot or running for about 1/2 hour. Heat related problem.
Could this be worn out o2 sensor? Clogged cat? Bad Map sensor? I am thinking of trying o2 sensor first.
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Re: 89 W100 truck stumbles and pops/cracks wont run right
[Re: Wizard]
#2479549
04/08/18 06:25 PM
04/08/18 06:25 PM
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Joined: Feb 2007
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I could not get the oxygen sensor busted loose so I put on the new MAP sensor on. This fixed the truck and not having anymore problems. Still going to put the oxygen sensor on, just have to bust it loose somehow to get new sensor on. Truck has 82,000 miles on it. Sensor needs replaced anyhows.
Wizard
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