rain, windshield wiper (stalled out)

[krs1r/t]

about a month ago we got some rain while i was at pizza place eating, and when i came out i started the truck let it sit for a minute and turned on my wipers to clear drops off of windsheild and it stalled! have not had a problem in the rain since, till yesterday i turned on wipers and it stumbled hard but satyed running!!
any info would be great!!!

[NoRalPh]

It seems to be CPS related, here's a good read on the subject -> Stumbles when it rains??

[INFRNL]

What cps are you running? Its been known that some BWD cps's cause this issue. I run a bwd cps with no issues, luckily.

try a differnt cps. There is a fix, I saw a thread on it recently.

[wireman116]

My 1999 is running terrible when you turn on the windshield wipers raining or not. I can`t seem to track that on down either. I installed a new CPS sensor from Ford & it still runs terrible with the wipers on. Turn the wipers off & it purrs like a kitten.Looks like we are both in the same boat?

[350dieselsmk]

ive had the same problem for about a year. its the cps i just havent had time to fix it recently.. i bought a junk one from advanced auto that caused it

[NoRalPh]

Originally Posted by wireman116

My 1999 is running terrible when you turn on the windshield wipers raining or not. I can`t seem to track that on down either. I installed a new CPS sensor from Ford & it still runs terrible with the wipers on. Turn the wipers off & it purrs like a kitten

Change the wiper motor next?

[Demian1970]

I had the same problem and someone directed me to that CPS thread.
Bought the Ford CPS from my local dealer and the problem went away.

[wireman116]

What does the cam position sensor have to do with the wiper motor? I have put a new sensor in from Ford. I still have the same problem. Thanks guys

[Demian1970]

Read the thread in the link posted above by NoRalPh.
It helped me fix mine.
Somehow, the cam sensor sends a signal to the computer that is on the same frequency as the wiper motor or something to that effect.
When the wipers are on, the cam signal gets jumbled, sometimes only when the wipers are on intermittent.