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Hi all. I don't really post on here often however I hear a lot of good things about this site from my good friend Lorenzo C (GPSE3400). Anyways here is a brief story:
My gf/myself own a 1997 Buick Skylark Gran Sport Coupe (pretty rare from what I am told) that orginally had a 3100 sfi in it. To make a long story short after repairing the lower intake manifold gaskets for the second time in it's life it spun the journal one day on my way home from work about this time last year
The good news is having been around these engines for a while now, and with some help from Lorenzo we managed to get a 3400 from a 00 grand am gt to plop in there with the 3100 injection and computer. After the swap it ran like a top with only minor driveability issues such as a rough idle on cold startup or long cranking when the engine is hot. Either way not a show stopper and the increase in power was noted immediately.
Fast forward to last weekend. We decided to get some 3400 injectors out of a 98 Chevy Venture minivan and try using a 97 computer from a pontiac transport minivan to control this. From what we know this works all well and dandy in the W-platform however when we hook up the computer the car started perfect, idled civil and even goes in and out of gear. The problem was I had no tach signal, the Theft light is on and the battery light is also on. Now I have not driven this vehicle yet to see if it shifts correctly but I don't see why it would not.
In a feable effort to get things worked out I went back to yard and swapped out the 97 Transport ECM for a 96 out of an Oldsmobile Sillouette. Hooked it up and got the same results as above.
Basically I'm wondering if anyone else has tried this kind of ecm swap in their N bodies and if you have could you provide me some information on what the differences are between my factor wiring on the skylark and that of the minivan. Or if you could just get me some wiring diagrams or the ECM pinout for the olds van and the skylark ecms I could probably figure out the differences and swap the wires around.
If there is anything I am overlooking please feel free to let me know. Thanks for the help in advance.
Ken
My gf/myself own a 1997 Buick Skylark Gran Sport Coupe (pretty rare from what I am told) that orginally had a 3100 sfi in it. To make a long story short after repairing the lower intake manifold gaskets for the second time in it's life it spun the journal one day on my way home from work about this time last year
The good news is having been around these engines for a while now, and with some help from Lorenzo we managed to get a 3400 from a 00 grand am gt to plop in there with the 3100 injection and computer. After the swap it ran like a top with only minor driveability issues such as a rough idle on cold startup or long cranking when the engine is hot. Either way not a show stopper and the increase in power was noted immediately.Fast forward to last weekend. We decided to get some 3400 injectors out of a 98 Chevy Venture minivan and try using a 97 computer from a pontiac transport minivan to control this. From what we know this works all well and dandy in the W-platform however when we hook up the computer the car started perfect, idled civil and even goes in and out of gear. The problem was I had no tach signal, the Theft light is on and the battery light is also on. Now I have not driven this vehicle yet to see if it shifts correctly but I don't see why it would not.
In a feable effort to get things worked out I went back to yard and swapped out the 97 Transport ECM for a 96 out of an Oldsmobile Sillouette. Hooked it up and got the same results as above.
Basically I'm wondering if anyone else has tried this kind of ecm swap in their N bodies and if you have could you provide me some information on what the differences are between my factor wiring on the skylark and that of the minivan. Or if you could just get me some wiring diagrams or the ECM pinout for the olds van and the skylark ecms I could probably figure out the differences and swap the wires around.
If there is anything I am overlooking please feel free to let me know. Thanks for the help in advance.
Ken
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