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Mar 1, 2012 | 10:52 AM

#16

A/Ox4

9 ECHO 1

Joined: Aug 2009

Posts: 12,467

Likes: 58

From: Missouri

Quote:

Originally Posted by mueckster

Taken from my Ford manual:
The PCM receives engine rotational position information from the Camshaft Position (CMP) sensor. The CMP is a hall-effect device. It outputs 12 volts to the PCM whenever it detects the iron of a spoked target wheel in front of it, and it outputs 0 volts whenever it detects the space between the spokes. The target wheel spokes and spaces are each 15 crank degrees, except for narrow spoke which indicates cylinder No. 1 and a wide spoke which indicates cylinder No. 4 (fires 5th). The NGS PID RPM is generated by the PCM from the CMP signal.

Good stuff

Wonder why 1 and 4 are different.

Mar 1, 2012 | 11:13 AM

#17

woodnthings

Cargo Master

Joined: May 2010

Posts: 3,047

Likes: 10

From: Snohomish, WA

They are different so the PCM knows where the engine is at based on the cps signal. This is how the timing is calculated and the PCM knows which cylinder it is on.

Mar 1, 2012 | 11:15 AM

#18

A/Ox4

9 ECHO 1

Joined: Aug 2009

Posts: 12,467

Likes: 58

From: Missouri

Quote:

Originally Posted by woodnthings

They are different so the PCM knows where the engine is at based on the cps signal. This is how the timing is calculated and the PCM knows which cylinder it is on.

Ahh ok good point. Otherwise it would be arbitrary and it could be anywhere.

Sounds like the PCM has short term memory loss....

"1, 2, 3... ummm what? OH! That means 4! SWEET!... 5, 6, 7, 8... ummmmm.. OH! 1 again. YES! 2, 3... uhhh..."

Mar 1, 2012 | 11:18 AM

#19

Shake-N-Bake

Post Fiend

Joined: Sep 2003

Posts: 6,096

Likes: 27

From: Mesa AZ

Quote:

Originally Posted by A/Ox4

Good stuff

Wonder why 1 and 4 are different.

Quicker starts. The sensor picks up either #1 or #4 and sets the timing accordingly.

Mar 1, 2012 | 03:50 PM

#20

danskool

Go Bills !

Joined: Jan 2008

Posts: 2,778

Likes: 65

From: Buffalo, NY

Quote:

Originally Posted by A/Ox4

Sounds like the PCM has short term memory loss....

"1, 2, 3... ummm what? OH! That means 4! SWEET!... 5, 6, 7, 8... ummmmm.. OH! 1 again. YES! 2, 3... uhhh..."

That funny.

Mar 1, 2012 | 04:21 PM

#21

woodnthings

Cargo Master

Joined: May 2010

Posts: 3,047

Likes: 10

From: Snohomish, WA

Here is the Cam Wheel with the targets marked up and the firing order added.

Mar 1, 2012 | 06:31 PM

#22

Pitcrw6

Logistics Pro

Joined: Apr 2010

Posts: 4,446

Likes: 26

From: Panama City, FL

What do you plan on doing to the eng? What kind of upgrades and mods? Is this a spare eng you have? What yr? Sorry for the questions but just wondering.

Mar 1, 2012 | 07:08 PM

#23

JOHN2001

Logistics Pro

Joined: Dec 2010

Posts: 4,738

Likes: 15

From: Temperance, MI

Quote:

Originally Posted by timmyboy76

Hey Doc..EXCELLENT thread, bud...reps to ya. Now if i know how to rep...

There is a "heart" at the upper right hand side of each of our post, click on whoevers "heart" you want to rep... youll figure out the rest its self explainatory

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Mar 2, 2012 | 04:31 AM

#24

Nsaan

Posting Guru

Joined: Aug 2010

Posts: 1,002

Likes: 1

Quote:

Originally Posted by timmyboy76

Hey Doc..EXCELLENT thread, bud...reps to ya. Now if i know how to rep...

This made me laugh, It took me a second to realize you weren't talking to me... that has been a nick name that people started calling me 20 years ago. I guess I have not let that out on here yet.

I have been trying to figure out hall effect devices for a while now. We use them in Gas pumps as pulsers, so the computer can know how much fuel you pump. It is 500 pulses per gallon.

Mar 2, 2012 | 04:33 AM

#25

Nsaan

Posting Guru

Joined: Aug 2010

Posts: 1,002

Likes: 1

duplicate post

Mar 2, 2012 | 08:22 AM

#26

snakedoc

Thread Starter

Postmaster

Joined: Jan 2009

Posts: 4,006

Likes: 1

From: AL, Reform

Quote:

Originally Posted by robbragiel

What do you plan on doing to the eng? What kind of upgrades and mods? Is this a spare eng you have? What yr? Sorry for the questions but just wondering.

it is going to be stock other then some orings form Bob. i bought a 450 with a bad motor the one on the ground and i going to put this motor in the 450.

Mar 2, 2012 | 12:28 PM

#27

dmanshane

Tuned

Joined: Sep 2011

Posts: 399

Likes: 1

From: Ness city Kansas

I would like to see the rear main seal area and the back of the engine me and a friend are dightin an oil leak we are pullin tranby to tomorrow some pics would be awesome like of block plugs and stuff on the back of the engine