• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

Odd /no cam sensor. Please help!


Dirtman

Former Middleweight Moss Fighting Champion
Joined
May 28, 2018
Messages
19,304
Reaction score
13,326
Points
113
Location
41N 75W
Vehicle Year
2009
Engine Type
2.3 (4 Cylinder)
Transmission
Automatic
2WD / 4WD
2WD
Total Lift
It's up there.
Total Drop
It's down there.
Tire Size
Round.
My credo
I poop in the furnace.
Im not good with obd1 systems. So I have no further value but Ill do you a favor and send up the bat signal for the wiring guru around here.

Calling @RonD
 


RonD

Official TRS AI
TRS Technical Advisor
Joined
Jun 2, 2012
Messages
25,290
Reaction score
8,290
Points
113
Location
canada
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
If you are running a 1990-1994 4.0l 60-wire computer, then the spark system is separate from computer

It has these 3 parts: https://forums.hybridz.org/applications/core/interface/imageproxy/imageproxy.php?img=http://i17.photobucket.com/albums/b81/BRAAPZ/EDIS/EDIS-6Large.jpg&key=ddfaa013169dd6c9cae2eb0a20b5937227598ea7d84cd3a108ff01cbf2fb1a84

The coil pack
The EDIS-6 spark controller
The Crank sensor and its tone wheel on the crank shaft pulley

Crank sensor is connected to EDIS-6
EDIS-6 is connected to coil pack

Crank sensor========EDIS-6==========coil pack

(people running there own fuel injection systems liked this EDIS system because it was also stand alone, doesn't "need" a computer)

The crank sensor starts the ball rolling, its a VR sensor so generates its OWN AC voltage, .5volt, so not much, but its the PULSE thats used not the voltage
This Pulsed AC is for timing, the tone wheel has a missing tooth(seen at bottom of pic) and that gap denotes #1 TDC
Each tooth is 10deg apart, so this is engine's timing
The EDIS-6 sends this timing Pulse to the computer, the computer doesn't even know you want to start the engine until it gets this crank sensor pulse from EDIS-6, computer then uses this Pulse to time the fuel injectors

The EDIS-6 then Grounds the Coils according to this Pulse to spark cylinders spark plugs in order

If you spray fuel into the intake, 50/50 test, and try to start it you can can either confirm there is spark(and at the right time) or confirm there is no spark
Quick and simple test

EDIS-6 modules rarely fail, never even read about one failing except in an accident, because they spark the coil pack they do run hot so are mounted to the rad support usually on the front side for better cooling, so they can be damaged in a front end collision


The Cam sensor was added to 4.0l OHV in Rangers in 1995 when Rangers also got the newer larger computer, 104-wire
These newer computer also had the EDIS-6 built-in so crank sensor and coil pack hooked to the computer
Crank sensor is still the main timing sensor, the only sensor that can cause a no start
Cam sensor has better "resolution", it spins at 1/2 the RPMs of the crank, so is better to time injectors for when intake valves are just opening so less wasted fuel coating the head ports
If the CEL(check engine light) goes off when cranking engine over that means computer is getting Crank sensor signal
If CEL stays on when cranking then its not

Calif sold vehicles required Cam sensors on earlier models of most engines, so like always there are exceptions to EVERYTHING, lol
 
Last edited:

Rat Rod Bob

New Member
Joined
May 2, 2020
Messages
13
Reaction score
0
Points
1
Location
in my garage
Vehicle Year
97
Make / Model
ford ranger
Transmission
Automatic
Im not good with obd1 systems. So I have no further value but Ill do you a favor and send up the bat signal for the wiring guru around here.

Calling @RonD
Wonderful! Thanks again so much for you contribution to helping me keep some of my hair.. 🤪
 

Rat Rod Bob

New Member
Joined
May 2, 2020
Messages
13
Reaction score
0
Points
1
Location
in my garage
Vehicle Year
97
Make / Model
ford ranger
Transmission
Automatic
WOW Thank you SOOO Much RonD!
That is a lot of help! I really appreciate all the insight! I thought we were just loosing our minds! LOL
Still working on it but now with so much more understanding and direction to be able to diagnose. We thank you all again!
 
Last edited:

Sponsored Ad


Sponsored Ad

Members online

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Truck of The Month


Kirby N.
March Truck of The Month

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Follow TRS On Instagram

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top