Last night I went up to the store, about 10-15 mins from home. An hour later when I was about half way home, I thought I heard the engine miss a beat and then again a few seconds later. I just figured the tranny was shifting odd for some reason. But a few minutes later, driving down the road, the engine starts running rough, missing, almost drying on me. So I stepped down the throttle and it would clear up enough to drive. Then I got to this corner I had to turn, I had to stop to wait for traffic, the truck idled fine, but when I went to accelerate, it started sputtering and died on me. Luckily I rolled off into the subdivision! So I cranked it a few times and got it to stay running, went to accelerate in drive, and it dyed again. After this happened a few times, I stepped it up to about 2000 in neutral, dropped it into drive, and was off. It was sputtering and missing for a half mile down the road. It probably would have died but I kept my foot into it. After those few minutes, the truck ran fine as I neared the house and parked.

I was thinking this might be a fuel gelling issue? It was 0 - 10 degrees around here the previous days, but yesterday it was about 30. I also treat the fuel. Why would the truck run fine on the way there but then comming home I had the trouble?

Other thoughts: CPS, fuel pump, hpop, injectors?

Hopefully somebody has some thoughts on this.

 

You might want to return the engine to stock just to eliminate the TS chip.
Is the CEL lit? Get it scanned for codes even if the CEL is not lit, there may be a soft code stored.

What did you treat the fuel with, some additives won't address gelling if that's you problem. Get it into a warm building if you can.

I feel your pain....intermitant trouble is the worse type to deal with.

 

sounds like fuel starvation could have been gelling or watter freezing.

 

No CEL but it's something I'll check into. I used Stanandyne Performance Formula to treat. I hope it's just some bad/gelled fuel. Although I wouldn't mind replacing (or should I say upgrading!) some of those other parts I mentioned, I didn't really want to do it right now.

 

No codes. I don't think its a gelled fuel problem. I added anti-gel to the tanks and fuel bowl, replaced fuel filter, and got some new fuel. I drove the truck around for a while and it was fine. So I drove 30 miles to work, not one problem. Then on the way home, the truck died twice. Just started running rough and stalled out, while I was driving. It took several tries to restart the truck after it dies to keep it running. WTF! Could this be a CPS at all? Or fuel pump? Unless it's a plugged fuel line? The only other thing I could think of is air in the fuel line. I ran the front tank a little lower than I normally a few days ago (still above E). I had no idications of trouble at the time. But when all these problems occured I've been running the rear tank.

 

If you ran that one tank down lower than usual I bet it picked up some junk,how did the filter look when you changed it?

 

The filter didn't look plugged up. It was an even grayish color, but no big particles or sludge or anything. I just replaced it last fall though. Is there a procedure for cleaning any of the fuel lines or return lines?

 

I don't know if there is a procedure but maybe they can be blown out with air if that's what the problem is

have you checked the fuel pressure?

 

No, haven't checked the fuel pressure. Would you check that by the FPR? Do you think it would tell me anything unless I caught it when it actually started to die on me?