Cold weather timing
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Junior User
Joined: Mar 2002
Posts: 56
Likes: 0
From: Detroit area
Cold weather timing
Well, the weather is getting darned cold....time to change the timing on my 85. I have noticed that as the temperature outside changes, my Bronco II acts as if the timing is off under load. Works fine in park, but if I drive it, it hesitates and spits like the timing is off...I'm waiting to see myself on one of the darwin award lists because a timing light does me no good, I have to have my buddy put the vehicle in gear , put it under load and adjust by ear while perched atop the fender. Any advice would be appreciated. It's an 85 with a 2.8 (carbed of course) and an automatic.
Postmaster
Joined: Dec 2001
Posts: 3,742
Likes: 2
From: UT
Why doesn't a timing light work for you? Setting the timing on these isn't very difficult -- except for an important little detail that most people miss. To set the base timing, you must disconnect the SPOUT connector.
The KOER test also allows you to check the computer's spark advance.
The KOER test also allows you to check the computer's spark advance.
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Junior User
Joined: Mar 2002
Posts: 56
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From: Detroit area
The reason the timing light doesn't work is, without the spout connector plugged in, timing comes up correct, at idle, in park. It even revs up fine under no load.However , let's say below 40 degrees temp,when its under load it runs terribly, unless I go thru the above process. It's only when the vehicle is under load..;.i.e. driving , or under acceleration, that it acts up. It's been doing this for a couple years, as long as I go thru this process, it runs pretty good, until the weather changes again. I have to set it back again in the spring when the weather warms up again.
Posting Guru
Joined: Jun 2003
Posts: 1,777
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From: Perry,Ga.
Originally posted by IamToyoftherm
Is there a sensor or a relay for this? Driveability was never my strongest suit.
Is there a sensor or a relay for this? Driveability was never my strongest suit.
New User
Joined: Jan 2004
Posts: 5
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From: Indy
cold weather
Hey I am having the same problem and have not been able to locate the problem. I have put my code scanner on and ran diagnostics with no results?
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Postmaster
Joined: Dec 2001
Posts: 3,742
Likes: 2
From: UT
Originally posted by IamToyoftherm
Is there a sensor or a relay for this? Driveability was never my strongest suit.
Is there a sensor or a relay for this? Driveability was never my strongest suit.
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Junior User
Joined: Mar 2002
Posts: 56
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From: Detroit area
I figure there has to be something that senses the outside airtemp. After all, it seems to function fine if I change the timing at the change of seasons. I did run codes, and one of the codes I got was a bad primary fuel pump circuit, which being a 2.8 carbed motor actually means a bad TCP. Could that be what causes the problem? I know the TCP is the little vaccuum relay on the passenger side fender closest to the door, but not sure exactly what it controls.
Freshman User
Joined: Dec 1999
Posts: 48
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From: Lisbon Falls USA
The thing in the fender is a control solenoid that controls a vac operated diaphram on the carb. It is located in the front of the carb just above the power valve. The name TCP is short for Temperature Compensation. This little gem is supposed to enrich the fuel mix when the temp is cold. I have problems with mine and have gone everywhere looking for information on this. No luck so far. Even the technicians at the local Ford garage have no information. They simply say if they get the code they check the solenoid and the part on the carb and if either are bad they replace them. Just try and find these parts though???
If anyone has any further information please help us all out??
I am thinking about making a plate and blocking it off. If I knew more information it would be helpful in getting to the bottom of the problem.
If anyone has any further information please help us all out??
I am thinking about making a plate and blocking it off. If I knew more information it would be helpful in getting to the bottom of the problem.
