Adjusting the timing on an 82

Reply Subscribe

Thread Tools

Search this Thread

Jun 28, 2011 | 05:08 PM

Wrecked82

Thread Starter

Le Mans Master

Joined: May 1999

Posts: 6,692

Likes: 29

From: Texas

Adjusting the timing on an 82

Just asking. Can you just put it into diagnostic mode and not undo the EST wire? I know, disconnecting the wire is the right way, but why not just do the paper clip thing and put it into diagnostic. That way computer not in charge.

Jun 28, 2011 | 08:50 PM

terry82

Le Mans Master

Joined: Jul 2000

Posts: 6,662

Likes: 162

From: columbia city in

when you do the paper clip you are not suppose to have the motor on .but when you set your timing you need the motor on.

Jun 28, 2011 | 10:40 PM

7T1vette

Team Owner

Joined: Jan 2006

Posts: 37,637

Likes: 3,112

From: Crossville TN

Oh, heck...what do the GM engineers know (you know, those guys that designed and developed that system)?

I think if the book says to not have the engine running, there is likely a very good reason....

Jun 29, 2011 | 05:46 PM

Wrecked82

Thread Starter

Le Mans Master

Joined: May 1999

Posts: 6,692

Likes: 29

From: Texas

Quote:

Originally Posted by terry82

when you do the paper clip you are not suppose to have the motor on .but when you set your timing you need the motor on.

You do the paper clip thing when you are adjusting your tbi's and, obviously, engine must be running to pull the vacuum. Are you telling me I should not put it into diagnostic mode when balancing tbi's?

Jun 29, 2011 | 05:48 PM

Wrecked82

Thread Starter

Le Mans Master

Joined: May 1999

Posts: 6,692

Likes: 29

From: Texas

Quote:

Originally Posted by 7T1vette

What book and where?

Seems like I remember from the crossfire injection forum, the instructions are to put ecm into diagnostic mode.

Patiently awaiting reference to the book that you easily quote as a reference.

Jun 29, 2011 | 06:45 PM

terry82

Le Mans Master

Joined: Jul 2000

Posts: 6,662

Likes: 162

From: columbia city in

all plug in code checkers say to not start the motor .why this is i dont know .you can if you want to .i was just following directions .if you have done this and it did not hurt anything ,good that way we wont worry if we start the car by mistake .when i balance my tbs i do not use the computer .i use a manometer at idle .

Jun 29, 2011 | 06:53 PM

Wrecked82

Thread Starter

Le Mans Master

Joined: May 1999

Posts: 6,692

Likes: 29

From: Texas

Quote:

Originally Posted by terry82

Yes, I do to. In VERY brief terms, get up to operating temp, put in diagnostic mode, remove IAC connection, plug the whatever intake on the tbi, and then use a water vacuum guage to adjust tbi's until balanced. I like to check them after everything re-attached, etc. and see what the computer adjusted results are. Also adjust the tps not using, of course, the paper clip thing. Wish I could get back to the crossfire resources, but Ken73 got put out with me and banned me for life.

Jun 29, 2011 | 06:59 PM

terry82

Le Mans Master

Joined: Jul 2000

Posts: 6,662

Likes: 162

From: columbia city in

okay you are useing the diagnostic mode to check how its running .that is not needed to adj the tbi setting . if the manometer is used the car should run well .