TPS/PCM issues

[7.31psd]

I bought an e99 auto from a friend. He bought the truck from the original purchaser. Truck is stock except for BD trans, BD torque lockup, and a 6637. Had a bd chip on it but friend took it off due to hard shifting. My issue is when it rains and I run the wipers, seems to be only on intermediate, truck bucks and cuts out. Google and I found that the ground on the wiper and ground on the pcm are shared and the wiper motor will cause issues for the pcm. Makes sense to me. So that one solved, well maybe.

Issues at this time. This truck has been going through Ford throttle assemblies left and right. Like 4 in the last 2 years. Whats the likely hood that the pcm is messing up the TPS? Maybe the wiper motor is messing with the pcm and pcm is screwing with the TPS with weird voltage or something.

Thinking I might need to replace wiper motor, or very least move the ground, buy a new pcm and have it flashed and then a new tps or am I going the wrong direction??????????? I'm not new to PSD's and the obvious things have been checked or replaced.

I'm extremely stumped, please help and TIA

 

[Arisley]

Check the multi-function switch and the wiring to it, sometimes that causes the wiper issue.

 

[7.31psd]

Thanks Arisley but I'm more worried about the throttle assembly and why is going out. But I will look into that.

 

[7.31psd]

Anybody know if any auto, 7.3 pcm will work in my truck? Is e99 compatible with say an 01?

Think I'm just going to start throwing parts at it.

 

[Luke@MillerPerformance]

I bought an e99 auto from a friend. He bought the truck from the original purchaser. Truck is stock except for BD trans, BD torque lockup, and a 6637. Had a bd chip on it but friend took it off due to hard shifting. My issue is when it rains and I run the wipers, seems to be only on intermediate, truck bucks and cuts out. Google and I found that the ground on the wiper and ground on the pcm are shared and the wiper motor will cause issues for the pcm. Makes sense to me. So that one solved, well maybe.

Issues at this time. This truck has been going through Ford throttle assemblies left and right. Like 4 in the last 2 years. Whats the likely hood that the pcm is messing up the TPS? Maybe the wiper motor is messing with the pcm and pcm is screwing with the TPS with weird voltage or something.

Thinking I might need to replace wiper motor, or very least move the ground, buy a new pcm and have it flashed and then a new tps or am I going the wrong direction??????????? I'm not new to PSD's and the obvious things have been checked or replaced.

I'm extremely stumped, please help and TIA

Change the cam sensor. Napa brand ones can cause issues with the wipers on.

 

[Arisley]

2000 and 2001 PCM's will work.

Throwing parts at it can get real expensive, real fast.

 

[lincolnlocker]

Change the cam sensor. Napa brand ones can cause issues with the wipers on.

this. if its the black bw cps then im betting thats the issue.

live life full throttle

 

[7.31psd]

Yes, it should be a ford one but who knows what his mechanic did. He did install autolite glow plugs in and dorman vc gaskets.

 

[7.31psd]

Yes throwing parts gets wifey mad fast. Shes already not liking the situation. Going to pull the cps and look at it after lunch. Grey are the ones to have correct?

 

[lincolnlocker]

Yes throwing parts gets wifey mad fast. Shes already not liking the situation. Going to pull the cps and look at it after lunch. Grey are the ones to have correct?

prolly wont get that at ford anymore. it will prolly be purple. same from ih.

live life full throttle

 

[Jomax]

Get those autolight glow plugs outta there.... get genuine ford put in.

Sent from my SM-N900V using Tapatalk

 

[lincolnlocker]

Get those autolight glow plugs outta there.... get genuine ford put in.

Sent from my SM-N900V using Tapatalk

whs... before its to late and you have to pull the heads due to the tips swelling to much.

live life full throttle

 

[Luke@MillerPerformance]

whs... before its to late and you have to pull the heads due to the tips swelling to much.

live life full throttle

Or when one decides to get a little shorter than the rest like a 6.0 I have in the shop right now.

 

[lincolnlocker]

Or when one decides to get a little shorter than the rest like a 6.0 I have in the shop right now.

oooooh, no good

live life full throttle

 

[7.31psd]

I'm not real happy about the glow plugs either. You guys would be shocked if I told you all the BS crap he did. Unfortunately My buddy trusts him. On gas he may be fine but not on PSD's.

 

[lincolnlocker]

I'm not real happy about the glow plugs either. You guys would be shocked if I told you all the BS crap he did. Unfortunately My buddy trusts him. On gas he may be fine but not on PSD's.

no, we prolly wouldnt be shocked.. most of us at one point prolly did the same till we learned better..

live life full throttle

 

[Arisley]

Or have heard or seen pretty much everything on this or the previous two boards.

 

[lincolnlocker]

Or have heard or seen pretty much everything on this or the previous two boards.

lol.. just one previous board here.. i dont remember what jesus was like as a kid like you do...

live life full throttle

 

[Arisley]

TheDieselStop wasn't that long ago. The Carnage thread was the beginning of PSN.

 

[lincolnlocker]

TheDieselStop wasn't that long ago. The Carnage thread was the beginning of PSN.

lol.. i know. i started on psn..

live life full throttle