Stalling in Rain

[StrokinVA]

Hey everyone i'm new to this site, confused:just figuring everything out still. I have an 01 F350 7.3. I have been having this problem for 6 months. The truck will stall at different times and different speeds and only does this in the rain. My friends dad shot me an email about a bad IDM that gets water in it. I tried to seal it as best as possible and thought it worked. Until i was heading to Maryland and it acted as if it were going to stall and it threw a code. It was a cam sensor code which i had already replaced. So i replaced the sensor again and the next time it rained it cut off and didn't show any codes. Truck always cranks back up. Also i am also throwing a po603 code which is intrnl cntrl kam error or something like that. I have heard these can be caused by it being chipped. I do have a SCT flash. Any help would be greatly appreciated thanks everyone.

[pipelayerjdh]

Welcome to the ORG.!


Has the windsheild been replaced?

[StrokinVA]

You guys are impressively fast. Yes it has about 3 weeks ago the problem was happening before also. Not really sure if that matters though, thanks for the input.

[AKsledder]

Hey there, I have a 99 F250 with a 7.3 and was having the same problem. It was driving me up a wall. Anytime I would drive in the rain it would stall for a quick second but recover and keep on running but if in town idling at a stoplight it would die completely. I was also getting the CPS intermittent code (p0344) I think. I tried sealing everything even put dielectric grease in the CPS connector. I also put in a new NAPA CPS but no help. I also parked it in the driveway hooked up my autoenginuity in record mode and sprayed water on the engine and sure as heck it would die. The problem for me anyhow was that autoenginuty checked so many different things I could never narrow down which sensor was giving me issues since I could only check nine at a time and CPS would check good. Sooo to make a long story short I bit the bullet and took it to the dealership and they said I was missing 5 volts from somewhere on the computer (never really got to talk to the mechanic to get the whole story) and had a outdated CPS since ford had come up with an updated one. I could live with the bad computer but really didn't believe the CPS could be bad or outdated. But I have to give the mechanic credit and he didn't think I was off my rocker as when he was doing the test drive and I was lucky that it was pouring rain when he did it he changed the computer first, and it was running better but would still stutter. I think I was having other issues. But then he changed the CPS and it ran like a champ. It did rain for three days following which I drove in 45 miles to work each way and it has never missed a beat. Sooo talk to ford about the new CPS and see what they say, Ford only charged me thirty dollars for the new CPS (nice reason to drive an older rig I remember not too long ago when I paid $150 for them) but give a new CPS a try, it seemed to work for me. Hate to hear other people having problems but I thought I was the only unlucky one with a strange problem. (BTW I also had me windshield recently replaced but can't believe they are tied together)

[StrokinVA]

Thanks for the info. I guess i will give ford a call. I just hate to knowin they are the original damn problem but i guess it happens.

[pipelayerjdh]

Let us know how it goes.

[Goose]

the newer CPS are much better and the newer rigs 99+ r like 30 as well

[AKsledder]

Any idea what they might have changed? It's not like the engine hasn't been around for 8 years, what did they think of to improve?

[StrokinVA]

thanks guys. i found one on ebay and it matched parts numbers. It was only $22 so it should be here in a few days. I will let everyone know if it works.

[pipelayerjdh]

Windshield leaks are common it the SD trucks. They will leak water onto the GEM, PCM, and fuse panel, causing different problems. Sometimes it will stall the truck. Sometimes it just effects accessories. If the CPS doesn't fix it, try checking around for water under the dash after a rain. The CPS can also cause this when the seal fails and lets water in the connector.