8.1L driveability problem...engine problem?

15021 Views 22 Replies 12 Participants Last post by dionysos412, Jan 28, 2007

mr_udy

Discussion Starter · Jan 18, 2007

My '02 8.1L w/ 36k on it just developed a driveability problem.

Apears to want to stall when slowing to a stop (rpms go below 500) and sometimes feels like transmision isnt downshifting causing the truck to sorta want to keep pushing forward for a brief second.

Truck accelerates fine unless coming off of the stumble where it feels like a sudden acceleration from the brief delay.

Truck idles fine when in nuetral or park (no load).

Woried that it was a tranny problem....but fluid level is correct and looks good-red. I dont believe its been serviced yet...could a spin on filter replacement fix whatever is going on? Thought I may have read a while ago that that can cause driveability problems....

Problem apears to occure when warmed up...but cold out. Might be coincidence as it just started getting cold around here.

Does this sound like the infamous 8.1L crank sensor issue?

I'm gonna post similar message in Allison OEM in case its a tranny problem.

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dionysos412

· #21 · Jan 25, 2007

hey guys, I hope im not hijacking this thread, but I was reading about the crank sensor issue and have a few questions. My father has an 01 8100 with about 140,000 miles on it and it just recently started stalling occasionally. My question is this... everyone here that has had stalling or near stalling issues only mentioned this happening when coming to a complete stop. We have never had this happen at lower speeds.. we'll just be driving down the road.. usually around 50 mph and it will just stall, we pull over, put the truck in park, turn the key off and start it back up and it will be fine. Would it be safe to assume that it is still the crank sensor? Or could it be something else? Thanks in advance for any help!

Pat

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8100HD

· #22 · Jan 26, 2007

Pat, sounds to me like it is almost certainly the crank sensor. I just had one replaced at about 92,000 miles and it would stall and then restart when driving down the road. It never did get to the point that you had to pull over and restart it but I figured it was a matter of time and went ahead and changed it. Runs perfect now.

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dionysos412

· #23 · Jan 28, 2007

8100HD;1552204; said:
Pat, sounds to me like it is almost certainly the crank sensor. I just had one replaced at about 92,000 miles and it would stall and then restart when driving down the road. It never did get to the point that you had to pull over and restart it but I figured it was a matter of time and went ahead and changed it. Runs perfect now.

Thanks alot... im hoping thats all that is wrong with it... its been worked hard for 140,000 miles and had nothing go wrong other than an o2 sensor at 200 miles... its been an amazing truck

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