7.3 starts and dies

[canadianstroker7.3]

having issues with my 99.5 f350,once a day for the last week at any given time it will stall after start up,as soon as i put it in gear and give it some fuel it dies,then it will start right up again with out any hesitation, then it dies as soon as i give it some fuel,it will do this 3-5 times over span of a minute and then run perfect for the rest of the day,truck has a few mods-mbrp 5in,banks cold air, superchip flashpak programmer,4in lift,35s and has ran great since the day i purchased it

[zrain25]

Does it sputter then die or just die like a electrical issues.

Does it do it once it's warmed up


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[canadianstroker7.3]

no sputtering,just dies,did it again today leaving work,pulled out on to busy street after starting it,hit the fuel and it died did this three more times in a row then ran perfect all the way home,doesnt matter if it is warm or cold,dont think it is fuel related?any ideas before i take it to my mechanic?

[canadianstroker7.3]

truck just dies,no sputtering,dont think its fuel related,any ideas?,my mechanic is on holidays,need to get the problem rectified over the weekend, need it for work on monday

[zrain25]

Any check engine lights I would get the codes stored in thr computer. Sounds like something electrical like the idm . The uvch would cause it to run real rough but when there really loose it could cause what I are having.

Did u change the csps


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[zrain25]

I meant CPS crank shaft position sensor.

When they go bad it will cause the engine to just die. Then it will run fine sometimes. Them just die randomly. I would start there there only 30 bucks



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[rffpsvb]

Cps, had the same problem, never threw a code, but a friend with a fancy snap on read a cps code, replaced and fixed!

[canadianstroker7.3]

bought the cps sensor,havent put it on the truck yet,been real busy with work,parked the truck this week,using my wifes f150,this weekend going to scan the truck for codes and make sure thats the problem,thanks for the help will let you know how i make out,i had to pay sixty bucks here in canada for that cps sensor,no big surprise,i also pay 6 dollars a gallon for diesel