Injector firing sequence (correct harness hookup)
Thread Starter
Acct suspended by request 12 Dec 2012
Joined: Sep 2007
Posts: 94
Likes: 1
From: Louisville KY
Injector firing sequence (correct harness hookup)
Hello all, 1989 L-98
I have removed my fuel rail / injectors today to take them to work and clean them, etc, and I realize I did not pay much attention to keeping my injector wiring harnesses in order. I had heard that all injectors pulse at the same time on these engines , so the order would not matter, but just read conflicting information somewhere.
Does the injectors have a particular firing order, if so are the plugs marked in any way as far as cyl, #?
Thanks!
Gary in Louisville
I have removed my fuel rail / injectors today to take them to work and clean them, etc, and I realize I did not pay much attention to keeping my injector wiring harnesses in order. I had heard that all injectors pulse at the same time on these engines , so the order would not matter, but just read conflicting information somewhere.
Does the injectors have a particular firing order, if so are the plugs marked in any way as far as cyl, #?
Thanks!
Gary in Louisville
Race Director
Joined: Dec 2006
Posts: 10,383
Likes: 4
L98 fires in batch mode. It has two batches. Drivers side, cyl 1,3,5,7, and passenger side, cyl 2,4,6,8. As long as you don't get the sides mixed up (IE putting an odd wire on an even injector) you're golden. Reinstall them in a way that routes the wires with the least tension on them.
Thread Starter
Acct suspended by request 12 Dec 2012
Joined: Sep 2007
Posts: 94
Likes: 1
From: Louisville KY
Ok thanks, I appreciate the info, so there is a firing order of a sort. Wow, I hope I can tell the even from odds. I know I did move them around some when I was cleaning up the intake manifold. Will tackle that tomorrow!
Thanks again!
Thanks again!
Le Mans Master
Joined: Jan 2002
Posts: 9,036
Likes: 13
From: Edmonton AB
I've come to believe that the '89 fires all eight simultaneously, despite
what Charles O. Probst writes in his book.
Corvette Fuel Injection & Electronic Engine Control: 1982 through 2001
Bentley Publishers
ISBN: 0837608619
.
what Charles O. Probst writes in his book.
Corvette Fuel Injection & Electronic Engine Control: 1982 through 2001
Bentley Publishers
ISBN: 0837608619
.
Melting Slicks
Joined: Apr 2002
Posts: 2,118
Likes: 0
From: St. Charles, MO Route 66 Corvette Club
wa4ky: I had the same problem when I first got my 89 Vette. It is amazing how the batch fire system works....but it does! A couple of suggestions for you: use new "O" rings (and lub with engine oil) when you install injectors and energize the fuel pump when you get the fuel system installed. Do this before you install the plenum. If you have a leak, it is easy to fix. Hope the project goes well.
Safety Car
Joined: May 2006
Posts: 4,290
Likes: 140
From: Salem NH
-- Joe
Safety Car
Joined: May 2006
Posts: 4,290
Likes: 140
From: Salem NH
My miniram has a lot of the same distribution issues GM found with the LT1. (thus adding the cylinder trims to compensate)-- Joe
