Overdrive problem
#1
Registered User
Thread Starter
Overdrive problem
My overdrive is cutting in and out, checked the trans with a test switch and the OD works fine. Charging system and speedo work properly, didnt find any obviously damaged wires, trans temp switch checked out OK.
(not CPS equipped)
Cleaned the engine wiring harness connectors and no change.
Is there a coolant temp switch for the computer that could cause this?
Could be the PCM?
If I can't get it to work normally then I guess that I'll have to try the
pressure switch on the trans port to control OD
Any ideas?
(not CPS equipped)
Cleaned the engine wiring harness connectors and no change.
Is there a coolant temp switch for the computer that could cause this?
Could be the PCM?
If I can't get it to work normally then I guess that I'll have to try the
pressure switch on the trans port to control OD
Any ideas?
#2
Registered User
Join Date: Dec 2010
Location: Land of the Toxic Avenger
Posts: 6,769
Received 1,637 Likes
on
1,112 Posts
My overdrive is cutting in and out, checked the trans with a test switch and the OD works fine. Charging system and speedo work properly, didnt find any obviously damaged wires, trans temp switch checked out OK.
(not CPS equipped)
Cleaned the engine wiring harness connectors and no change.
Is there a coolant temp switch for the computer that could cause this?
Could be the PCM?
If I can't get it to work normally then I guess that I'll have to try the
pressure switch on the trans port to control OD
Any ideas?
(not CPS equipped)
Cleaned the engine wiring harness connectors and no change.
Is there a coolant temp switch for the computer that could cause this?
Could be the PCM?
If I can't get it to work normally then I guess that I'll have to try the
pressure switch on the trans port to control OD
Any ideas?
Anytime I've had a overdrive issue, it's been the TPS. Once I eliminated that $500 sensor with $10 worth of parts from Radioshack, I've never had an issue since.
You don't have a Crank position sensor, or a TPS ?
#3
Registered User
Thread Starter
the truck does not have a factory installed CPS, and I forgot to mention
I have elimanated the TPS and done the potentiometer mod, worked
well until recently.
I have elimanated the TPS and done the potentiometer mod, worked
well until recently.
#4
Registered User
Join Date: Dec 2010
Location: Land of the Toxic Avenger
Posts: 6,769
Received 1,637 Likes
on
1,112 Posts
Read the last post in this thread.
https://www.dieseltruckresource.com/...65#post3233365
May or may not be relevant.
https://www.dieseltruckresource.com/...65#post3233365
May or may not be relevant.
#5
Registered User
On my truck, I had an intermittent wiring issue I could never find. The TPS was perfectly fine and working. Just intermittent to the OD solenoid. I finally ended up going to a manual switch.
#6
Registered User
Thread Starter
Read the last post in this thread.
https://www.dieseltruckresource.com/...65#post3233365
May or may not be relevant.
https://www.dieseltruckresource.com/...65#post3233365
May or may not be relevant.
Drove it again and it's working now,
Maybe I have a bad potentiometer or a cold solder joint going on.
Looks like I'm on the right track now.
Thanks Cougar
Thread
Thread Starter
Forum
Replies
Last Post
Racing_Joe66
Performance and Accessories 2nd gen only
20
09-22-2007 08:51 PM
72demon440
3rd Gen Engine and Drivetrain -> 2003-2007
3
04-27-2007 10:45 PM