problem with a socked smec.

[Bardo]

Friend of mine gave me a smes that someone else socketed some time ago. I was told it worked before hand but not since he got it back. I put a chip in with a good burn on it. The car will crank but not start. The relays click and the tac does a full sweep. I have no idea where to begin on this problem and I'm looking for advice. Thanks

[tryingbe]

Find another socketed SMEC and put in your chip in it, if your car starts, then this SMEC is bad.

[jonnymopar]

That sounds like exactly what happened when I accidentally put a blank chip in mine. Have you used this chip anywhere else? Are you sure it's a SMEC cal on the chip and not something else? (SBEC, LM)? If it's not a chip problem, then start looking closely around the socket. Make sure there are no cracked or otherwise failed solder joints. Pull the chip out and look closely at all the contacts in the socket to make sure none are bent.

[shackwrrr]

Which way is the chip oriented? I forget every time and get it backwards.

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[1BADVAN]

A car will crank with new SMEC I thought, in my experience if anything with the SMEC or chip is wrong the fuel pump won't prime with key on. Are you getting a fuel pump prime?

[Bardo]

I tried turning the chip around, didn't work. Fuel pump does not prime. It's been a while since I used the chip I put in it but I believe it worked fine in another smec. I have a emulator coming tomorrow.

[82 Rampage]

I had that happen, turned out to to be the power section of the smec, put a different power section in and it fired right up.

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[cordes]

A car will crank with new SMEC I thought, in my experience if anything with the SMEC or chip is wrong the fuel pump won't prime with key on. Are you getting a fuel pump prime?

This is my rule. If I don't get the fuel pump prime I generally don't even try to start the car.

[Bardo]

Where is that located? I tried using a different power module with this so called bad smec without any luck.

- - - Updated - - -

In the future I will take this in to consideration. My tac is not stuck all the way to the right.

[cordes]

The SMECs are one piece. That's the SM part of it. Single Module. The power board is on top of the logic board. The logic board contains the chip.

[Bardo]

Oh ok Thanks. Any chance you can post a picture of exactly what you're talking about? Is this something I can pull from any smec as a replacement? Also can I use a non turbo smec as a replacement being I will be burning my own cal?

[cordes]

I don't believe you can use a non-turbo logic board, and I know you can't use a non-turbo power board. If you remove the Torx screws from the SMEC case and take it apart, there will be two boards in there. The one on top is the power board it has the heat sinks on it for the injector drivers. The bottom board with the 60 way is the logic board. That's the one you have to socket.

[tryingbe]

Oh ok Thanks. Any chance you can post a picture of exactly what you're talking about?

Google found
https://www.google.com/search?q=smec...PJRq5xGVXFM%3A

Also can I use a non turbo smec as a replacement being I will be burning my own cal?

Turbo SMEC only, can be 88 or 89.

[Bardo]

Ok that's what I thought It was. I changed the power section of the smec and still no luck.

[Bardo]

I have a Ostrich. I should be able to put a good tune on that and see if it's the board or the tune.

[ajakeski]

TBI SMEC won't run a Turbo Engine. Same as LM/PM

[Bardo]

Just for clarification. I know a tbi smec won't work but can I socket a tbi smec and put a turbo tune in it?

[sdac guy]

Just for clarification. I know a tbi smec won't work but can socket a tbi smec and put a turbo tune in it?

No. The TBI Smec has only one injector driver for the one in the throttle body. The Turbo SMEC will have injector drivers to control all 4 injectors in the MPI system. There may be other hardware differences between them also, but the number of injector drivers is the biggie. Personally, I wouldn't even switch the power board between a TBI and Turbo SMEC.

Barry

[cordes]

No. The TBI Smec has only one injector driver for the one in the throttle body. The Turbo SMEC will have injector drivers to control all 4 injectors in the MPI system. There may be other hardware differences between them also, but the number of injector drivers is the biggie. Personally, I wouldn't even switch the power board between a TBI and Turbo SMEC.

Barry

I thought the injector drivers were on the power board?

[Bardo]

thanks berry. I was looking for another smec option because the turbo ones are getting harder to find in my local yard.