Lt1 Stalling. Why ?
Thread Starter
Instructor
Joined: Apr 2004
Posts: 110
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From: FRANKLIN SQUARE NEW YORK
Lt1 Stalling. Why ?
As you may or may not know, I put a '94 LT1 in my ' 76 . Up till now, it's been running great . Today, however, it decided to stall out of nowhere ! I'd come to a stop, the tach would jump all over the place and , good night ! It started but not right up . Also, it wanted to die as I was driving . I haven't checked for error codes, as I wanted to run it by you guys . Maybe this has happened to someone else ? 
The injectors were replaced a few months back . As I said, great running until today ! Any help and ideas are much appreciated ! 
The injectors were replaced a few months back . As I said, great running until today ! Any help and ideas are much appreciated !
Instructor
Joined: May 2006
Posts: 144
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From: Stockbridge GA
I had a friend that had the same thing going on the only code it was trowing was a anti theft code. He ended up replacing his ECU and tac filter to clean the problem up. This is after he spent a lot of money replacing the opti spark and just about every other sensor.
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Thread Starter
Instructor
Joined: Apr 2004
Posts: 110
Likes: 0
From: FRANKLIN SQUARE NEW YORK
Well, guess what ? After pulling the codes, more than once, I now know the problem . Unfortunately , it was the death code ! Opti-beast is the root of the problem I replaced it once, and I'm well aware of the upcoming nightmare !
I already have one on order, along with the water pump ( didn't want to take a chance !) . 
So, to all who left ideas, many thanks
Unfortunately , it was the death code ! Opti-beast is the root of the problem I replaced it once, and I'm well aware of the upcoming nightmare ! I already have one on order, along with the water pump ( didn't want to take a chance !) . So, to all who left ideas, many thanks
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Is this a full LT4 transplant, or did you put a LT1-4 mani on another engine....??? I did, on my L98 for simplicity, problem was I was NOT going to use that opti, no matter what, the largest thing was to make a dizzy pad and cut out the EGR boss/mounting
, and welding in a dizzy pad cut off a olde rotted out aluminum manni.....
it works really well, with a stock L98 dizzy, now how that matches up with your computer assuming a full LT4 setup, is anyone guess, I dunno, but I suspect something needs changed....
, and welding in a dizzy pad cut off a olde rotted out aluminum manni.....it works really well, with a stock L98 dizzy, now how that matches up with your computer assuming a full LT4 setup, is anyone guess, I dunno, but I suspect something needs changed....
Instructor
Joined: Mar 2007
Posts: 223
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From: Henryville Indiana
opti
With what you are spending on the opti and the water pump you could upgrade to the DELTEQ DIS.All it is ,is a NORTHSTAR 95-99 module and coils along with some harnesses(2) and their prosessor.
If you source your own module and coils,the cost is less than 500.00 and all the opti does is give a reference signal for crank position.You will need to get some custom wires....I'd go MSD or Taylor but they do have thier own custom wires for you application.
Personally,I'd rather have 4 30-40,000 volt coils instead of 1
www.delteq.com for info.
If you source your own module and coils,the cost is less than 500.00 and all the opti does is give a reference signal for crank position.You will need to get some custom wires....I'd go MSD or Taylor but they do have thier own custom wires for you application.
Personally,I'd rather have 4 30-40,000 volt coils instead of 1
www.delteq.com for info.
Last edited by R96IMP; Apr 26, 2008 at 06:47 PM. Reason: typo
