Need help with 7.3

[hardway3005]

I have a early 1999 F350 7.3 that will only run for about 30 seconds at a time and then just dies. Sometimes it will start up right away, other times I have to crank it a little bit longer. Either way it always starts back up but then dies after 20 or 30 seconds. I have had no problems up to this point and have 189,000 miles on the motor. I replaced the fuel pump thinking that was the problem with no success. I would rather have some direction instead of changing parts all day long. Any information would be greatly appreciated.

[sldghamr]

cam position sensor??

[hardway3005]

Thanks, I'll try that next.

[SMKSTAX]

When cranking does your tach move?

[hardway3005]

Yes, and while it is runing everything appears to be fine. I can hold the throttle at any range and it will run fine up to the point of 20 or 30 sec and then it dies again. If I do that it is much harder to get started again though.

[SMKSTAX]

Hmmmm.....that's odd. Well the CPS is relatively cheap if that's not it no biggie. They usually act this way when there on their way out.

[hardway3005]

Thanks for the help. I changed the CPS today and that seems to have fixed all.

[sldghamr]

Originally Posted by hardway3005

Thanks for the help. I changed the CPS today and that seems to have fixed all.

where did you get it and how much did you spend?? i replaced mine mid December 2007. my local Fraud dealer had one for $30.

[stewy]

and dont forget the recall on the cps

[hardway3005]

I bought it at a local parts store (NAPA) for $30.00 and thought that was pretty cheap.