Hi all...new to the forum and to the diesel scene. Bought a 96 f350 crew cab 7.3 a cpl months ago and have been having a problem with the cel coming on and a loss of power while driving at highway speeds. However if u stop turn the truck off then fire it back up..light is off and it runs fine againg til the light comes back on. I first thought it was a cps issue..but after 3 different ones have pretty much ruled that out. Has any of you encountered such a problem and if so what was it?

 

welcome to FTE.
you need to get the codes read to find out what the problem is. even if the light goes out, it will store a trouble code.
without knowing what trouble code is lighting the CEL, it is nothing but a guessing game.

 

Thanks for the reply tjc....i stopped by the local advance auto parts store and had them hook it up and no codes showed up

 

Trouble is, a lot of code readers will not communicate with our trucks.

 

So i ask...what now. Do i need to buy a reader? Those things arnt cheap....

 

No, they are not cheap. Did they get a P1111? If so, then maybe their reader worked. A P1111 is a pass code, no trouble codes present.

 

What I would suggest is that you either set yourself up with something to read codes, or take it to a shop and pay them a few bucks to pull the codes.

Me, I took the first route and got Torque Pro for my tablet and bought an inexpensive bluetooth OBDII adapter. Works like a champ if you're comfortable with technology (and cost me less than $40 total). Another route many have chosen is to add an Aeromotive Scangauge II to the truck. It plugs into the OBDII port and will pull codes, run some tests, and display live data. Another very good option which runs around $150-200.

 

Is this after acceleration or dipping into the throttle for little while?

 

This usually occurs after u hit and maintain a speed of around 60 to 65 and most often during accelaration while goin up a hill

 

Wonder if there is a code if its ICP under/over? Does this truck have a chip?

 

Truck is stock except for a cold air intake and just just recently did the 10k mod...had this prob b4 the mod tho. I have no way to pull the codes so i have no idea if it has any that may b ipc related. I did however follow the advice from a previous post and ordered me a bluetooth adaptor for the torqe app. Suposed to b delivered saturday. I hope that will allow me to pull codes and give me some direction.

 

I don't think you'll regret that move. There are a couple different threads going here on FTE about how to set it up to work with your truck, but if you need some help, send me a PM and I'll step you through it. It's not terrible if you're pretty comfortable with technology.

 

Yeah...thanks for that advice diy....i am pretty tech savy but thanks for the offer and i will get with ha if i need some help with it. Sometimes its always helpful if ya have someone who has a lil experence with it to help u along if needed. Just hope it will give me some direction on this problem...thanks again

 

I'm Having the same problem with my 95 F350 7.3 with 300,000 miles but with no codes or lights, it came on quickly and is intermittent. I have good fuel flow, air filter is clean and can find no other problems. any ideas?

 

Your problem is more than likely different than the original posters because your not getting a cel, or your cel is burnt out. I would recommend starting a new thread for this reason. But to get you started check the fuel pressure and fuel filter for condition. pressure will be a tough one because you will want to know what it is when you have this issue. ie. highway speeds