e 350 miss problem

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Oct 10, 2009 | 09:58 PM

#31

subford

Fleet Owner

Joined: Aug 2005

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From: Easton,Ks

Quote:

Originally Posted by garynewt

Supposedly there is a speed sensor in the transmission that sends signals to the PCM, maybe the PCM isn't processing them properly?

You should have aE4OD transmission and no there is no speed sensor in the transmission.
What you are talking about miss wired was the MLPS on the side of the transmission and if the information from this sensor is not getting to the PCM then it will shift hard and there will be no OD gear. The transmission will shift off the manual position of the shift lever and not be computer controlled.

You need to pull the plug out of the PCM and check the resistance from pin to pin as you move the shift lever to see if the values are right.

Here is the values:

Oct 10, 2009 | 10:02 PM

#32

subford

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From: Easton,Ks

Quote:

Originally Posted by kilohertz

Oh ok, the vacuum line is on the top isn't it ?

Yes it is.

Quote:

Originally Posted by kilohertz

and does that come off the fuel rail ?

The FPR is mounted on top of the fuel rail.

Oct 11, 2009 | 08:00 AM

#33

garynewt

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Joined: Nov 2005

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Thanks for the info. I'll check the resistance readings tomorrow.

Oct 13, 2009 | 08:20 PM

#34

andrewzx92000

Tuned

Joined: Sep 2002

Posts: 408

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From: saline USA

I have a 1993 5.0 and it had a horrible miss and pinging for a long time after I changed the spark wires.
I was in a ford dealer explaining the problem to a mechanic and he told me that spark#7 and #8 were next to each other on the cap and that if they are touching at any point along the way to the plugs that they will electro field each other and a miss will occur.
I went home separated the two plug wires and made sure they weren't close, never had another miss and never had another ping. Go figure, I hope yours is this simple.
Andrew

Oct 13, 2009 | 10:53 PM

#35

kilohertz

Thread Starter

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Joined: Jun 2009

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I wish it was that simple, something else to look at but I did the test already.....still working on it thanks.

Nov 17, 2010 | 10:55 AM

#36

chadwoody

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Joined: Nov 2010

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Kilohertz did you ever get this figured out. I am having the same problem and cannot figure it out between a dealership, independent shop, and 2 mechanic friends.