Help, Service Engine Light

[cchase]

I have a 99 F250 PSD and when I start up my Service Engine light comes on, the truck runs clunkey then the light will flash and go off leaving the truck running fine, It isnt throwing any codes that my local auto parts store can pick up, HELP!!! I have a haul to do for work in a week! Thanks

[Raul@Stealth Automotive]

you might want to chance the CPS just in Case its starting to go out... they are common to go out on our 7.3L's they sell a new cheaper cost version of it here is a link 7.3 Cam sensor replacement procedure

good luck hopefully this helps

-Raul

[Marty]

Get someone with an edge programmer or SCT and check the codes and post them here...

I had the same issue and it was a blocked EBPV sensor tube. While this might not be your culprit it is something I suggest to do anyways because it takes 15 minutes and it can only help!

remove the tube, blow it out, spray carb cleaner in it, blow it out again and then reinstall.

Look down IFO of your HPOP and there is a brass colored tube the comes out from underneath the EBPV sensor and runs to the passenger side exhaust manifold.

Takes a 16mm...

[cchase]

Thanks guys going to try both of those. Hopefully it helps. It wasnt tripping any codes as of yesterday because of course the light goes out when I get to the autoparts place.

[Dave]

Originally Posted by cchase

Thanks guys going to try both of those. Hopefully it helps. It wasnt tripping any codes as of yesterday because of course the light goes out when I get to the autoparts place.

if the light came on the code is there the cheap scanners that alot of parts places use wont pull codes on a diesel. I have tested this theory. I knew i had a wastegate malfunction code and a p1211 stored autozones scanner did not pick them up my buddies EVO got em right away

[cchase]

OK good to know, Its worrying me because the light seems to go off when the engine warms up, and with the light off the sputtering goes with it, it almost sounds like a valve isnt closing or opening right? Someone told me glow plugs, so now I am all worked up thinking that this is really gunna cost me. I ordered the CPS off ebay, should have it in a few days.