Code 173 and rough idle stalling
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Cargo Master
Joined: Oct 2008
Posts: 2,308
Likes: 1
From: Elyria, OH
If you have speed density, you will have to have a stock motor(especially a stock cam), otherwise you will have to covert to MAF, which requires a later model computer, change wires around in the harness, and MAF sensor of course. Otherwise you are just wizzin' in the wind. Super tune, chips, etc, results are very limited for speed density systems, and if you have the E4OD transmission it makes it a little harder to convert, because the tranny is controlled by the computer.
As to your comment above, the 89 in my sig has a cam, GT40 heads with 1.7RR and a set of LT headers and she is pushing close to 300hp 350tq running on SD.
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Cargo Master
Joined: Oct 2008
Posts: 2,308
Likes: 1
From: Elyria, OH
It looks to me like one of the injectors weren't firing at all because the runner in the upper intake was almost clean whereas the others you could see they were being used, like that cyl was really lean. I believe that the injectors were the problem all along because it fires up and runs like i have never seen before. The timing is backed off from before, but when it get a little warmer out here i will bump it back up and see how it handles
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Cargo Master
Joined: Oct 2008
Posts: 2,308
Likes: 1
From: Elyria, OH
Not a problem. I forgot all about the thread until i got the email of a response. I was happy with the outcome of the injectors and lifters. They (the lifters) were a pain to get out with the heads still on, but it was worth it. Now the motor runs smooth and quietly
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