Okay guys someone help me out... Please !!! Last month I tuned up my truck. It has a 4.9L with 130,000 miles on it. It ran great for a couple of weeks. Then while driving down the road one day it just fell flat on its face. I gave it more gas and it started bucking violently then it came back alive. My first thought was I just tuned this thing up what could it be... Fuel filter!! Ahha! I've owned the truck for several years and have never changed it. I heard that they are a bear to change for I took it to a shop and had them change it. Ran fine for a day then wham it did it again. So still stuck on the fuel train of thought I took it back and had the fuel pressure tested. Then shop said it was okay and the fuel pump was fine. So now I'm lost. I've figured out that when its starts missing out I can turn the ignition off while rolling down the road and turn it back on and presto it is okay after that. Could it be an electical part or is my in tank fuel pump geting flaky. I have a rear tank on it but it started leaking 3 years ago and I haven't used it since then. Could that be causing a problem with the fuel delivery? Thanks in advance for any help.


Roger

Oh I forgot there are no codes and I had the fuel injectors cleaned.

 

Bump, Come on someone please.... Does anyone have any ideas?

 

Hey buddy. I honestly think you'd be better off to test the truck out yourself. You can pick up a fuel pressure gauge fairly cheap, and test the pressure yourself.

Hang with us and you won't ever have to go to that shop again! It sounds to me like it's an ignition problem, so I suggest doing a full tune up, with plugs wires, dist. cap and a new rotor. If you need any help with said items, feel free to ask!

 

If you did a basic tune up, did you check the spark plug gaps? If they are too far gapped, once the engine gets to temp, it could have issues making the jump under rare situations, causing it to only happen momentarily. Also you very well could have gotten a bad plug or a wire or anything really. Tune up parts are not normally as good as the factory parts. As for the fuel filter, I hope you only got charged like 30 $ for it cuz its a 5 $ part and would have taken you 20 minutes to swap, at least on my 93...Grab some fuel injector cleaner, and get a good tank of gas in there (just fill it up somewhere other than where you did last) and run that tank through there, maybe you got an injector thats trying to clog...

 

Sounds like a pick-up coil to me. Not sure if there is a pick-up coil error code. Same symptoms I have experienced, except mine would not restart right away. I had to wait 10 minutes, possibly a cool down, for it to start. Your problem will get progressivly worse until it is changed.