V1 Engine swap issues

[MotoX2003]

So I have a goblin A/T and I love it! all it needed was more clearance so I bought some 35s to mount on it to get lots of clearance but the. I thought if I have such big tires I need more power! So I bought a 2007 engine with all the wiring and the supercharger with a stage 2 kit and the computer with a tune. But here lies my problem it won’t prime the fuel pump and it won’t crank over either. (The car ran perfect with all the old wiring and everything) oh also when I put it in reverse the lights don’t come on anymore (automatic transmission) the security light comes on and won’t turn off I tried the key relearn 4 times but didn’t seem to work. The starter and fuel pump both work because I can jump the relay and they both go. Another thing to add if I put the old computer in instead of the new one the fuel pump will prime once and it won’t do it again if I cycle the key. Any help would be amazing!

 

[MotoX2003]

So I have a goblin A/T and I love it! all it needed was more clearance so I bought some 35s to mount on it to get lots of clearance but the. I thought if I have such big tires I need more power! So I bought a 2007 engine with all the wiring and the supercharger with a stage 2 kit and the computer with a tune. But here lies my problem it won’t prime the fuel pump and it won’t crank over either. (The car ran perfect with all the old wiring and everything) oh also when I put it in reverse the lights don’t come on anymore (automatic transmission) the security light comes on and won’t turn off I tried the key relearn 4 times but didn’t seem to work. The starter and fuel pump both work because I can jump the relay and they both go. Another thing to add if I put the old computer in instead of the new one the fuel pump will prime once and it won’t do it again if I cycle the key. Any help would be amazing!

Also the new throttle body won’t open with the pedal. Going to try and see if the old throttle body will work

 

[MotoX2003]

Also the new throttle body won’t open with the pedal. Going to try and see if the old throttle body will work

It didn’t work either.

 

[r3drckt]

The SS/SC pedal has a secondary harness on it before connecting to the main harness and that might be part of the issue.

You have the ECM and BCM from a SS/SC? Sounds like you’re trying to incorporate the TCM to the SC motor and the data communication between the different engines I’m sure is different. That’s probably why no lights come on.

What I’d suggest is keeping the stock motor and transmission configuration that all worked. Then adding the SC to that motor and tuning for it. Would probably be the easiest way to get more power. Don’t think you could swap the forged portions from the LSJ into it, but you could try

 

[MotoX2003]

The SS/SC pedal has a secondary harness on it before connecting to the main harness and that might be part of the issue.

You have the ECM and BCM from a SS/SC? Sounds like you’re trying to incorporate the TCM to the SC motor and the data communication between the different engines I’m sure is different. That’s probably why no lights come on.

What I’d suggest is keeping the stock motor and transmission configuration that all worked. Then adding the SC to that motor and tuning for it. Would probably be the easiest way to get more power. Don’t think you could swap the forged portions from the LSJ into it, but you could try

I depinned all the wires out of the old harness for the transmission and put them in the new harness. There shouldn’t need to be much communication between the pcm and Tcm I would think. I’m not to concerned about the lights anyway I thought I’d just throw In all the issues I’m having. The only problem with that is I have a 2006 donor and I’ve heard from many people on the forums that you can’t tune them at all. Also I’ve never had anything tuned and my knowledge on a computer is very slim.

 

[MotoX2003]

I depinned all the wires out of the old harness for the transmission and put them in the new harness. There shouldn’t need to be much communication between the pcm and Tcm I would think. I’m not to concerned about the lights anyway I thought I’d just throw In all the issues I’m having. The only problem with that is I have a 2006 donor and I’ve heard from many people on the forums that you can’t tune them at all. Also I’ve never had anything tuned and my knowledge on a computer is very slim.

I assume it’s the security system that is keeping me out because I’m using the old key and ignition but i thought the key relearn would take care of that.

 

[Gtstorey]

Mixing and matching ECM, bcm, and tan isn’t likely to work unless you know exactly what you are doing. I’ve spent a lot of lately in the HPTuners forum and it’s covered up with people attempting to mix and match control modules and it really doesn’t work. Close and similar just doesn’t work.

 

[MotoX2003]

Mixing and matching ECM, bcm, and tan isn’t likely to work unless you know exactly what you are doing. I’ve spent a lot of lately in the HPTuners forum and it’s covered up with people attempting to mix and match control modules and it really doesn’t work. Close and similar just doesn’t work.

Not sure what you mean by tan . But I have the pcm and bcm from the new car so no mixing that I know of.

 

[Gtstorey]

Tan should have been “that”.

Did you check how the data wires run through the TCM?

Just adding the pins from the TCM to the ECM doesn’t mean they have a correct connection. At the best they are probably landed on dead points in the ECM. At worst they are feeding data to something that doesn’t know what to do with it.

 

[MotoX2003]

All the wires from the tcm just went to the fuse box plugs. I had two wiring harnesses so I just depinned the one and added the ones that were missing viewing from the other harness

 

[Gtstorey]

Have you tried reading codes? This will tell you if the data wires are functioning. Did you confirm the reverse switch is wired the same? What are you doing about the clutch position switch?

You may be right about the key being a problem but I'm not real familiar with what needs to be done for a relearn. But you should be able to disable VATS with HP Tuners with that ECM.

I would also be concerned if you bought a motor and ECM that was not in a running car and not knowing exactly what you have for an ECM that might have problems. I think you need to concentrate on data communication wiring so you can see if things are working at all. Ross has posted some stuff on how to do checks on the Data wires on the SC models. I think there are some differences in how the data wires are done between the base and the SC but I don't know the details and don't know what you have done for the swap.

 

[MotoX2003]

No I haven’t I don’t have anything to read them as of yet I bought one to read them but I let someone borrow it and never seen it again. I’m very bad when it comes to computers and all that. Is there a lot of knowledge to be able to disable the vats? Ya I am concerned about everything with the motor and ecm I should have made sure it ran before I bought it. Hmm I didn’t think about the new stuff requiring a clutch switch I will have to look into that. Would that be something in the bcm or pcm and could it be disabled by hp tuners? Is hp tuners worth getting? Do you have to be computer smart to use it? Thanks eh guys!

 

[Ark :D]

I don't want to discourage you, but I really think you need to trace your steps backwards and go back to all your original equipment to get back to a running, driving car.

The ECM's in the NA cars are different than the ones in the SC cars, and those are different than the ones in the TC cars. It's a very big assumption to make, thinking the SC ECM has any logic at all to communicate with a TCM from a NA automatic, since there are no automatic SC's.

Your data flow is definitely screwed up now. If data isn't flowing from end to end, the car won't crank, the lights won't work right, etc. This is most likely the result of combining a SC ECM with a TCM.

There is an outside chance you could look at a HHR SS to see how the ECM in that car talks to the TCM. However, again, that ECM is different than yours. The HHR SS is a turbo automatic.

Your best path to more power is to go back to your original running gear, then add a supercharger.

 

[jamesm]

For the 07 SS/SC(LSJ) engines, there are 3 sets of data wires. Two of them are green. There's a separate green wire from the ECM to the OBD port (pin 2 I think) that is separate and doesn't get combined with the other green wires in the dash harness when you thin the harness

Supercharged Wiring Kit

I seem to have a problem. The document that came with the kit contents says that I should have 2 BN/WH 10 foot extension for the body to dash. 1 for B9 and 1for C8. The kit only had one wire that was BN/WH, I can see if I have extra for that. The list shows a GN wire for C7. The wire stickers do...

dfkitcar.com

 

[Rauq]

According to this post, the P12 PCM can control an auto transmission, no TCM needed, but the '07 did not have parameters for trans control in HP Tuners. Keep in mind that data was last updated in 2007.

In my opinion, your issue is not with GMLAN data wires or bad grounds or a nick in the harness, it's that modules have been mixed and matched beyond their compatibilities. You mentioned you started with an '06 donor, I'm assuming that's an L61. I believe you're right in that that E16A ECM can't be tuned. Unfortunately I don't think the LSJ can be run with another factory ECM/PCM as the crankshaft reluctor is kind of a GM one-off and that is not a configurable variable in HP Tuners.

I'm no expert on these matters but I best guesses would be either swapping to an '05-06 LSJ P12 PCM and figuring out how to wire the trans to the PCM (deleting the TCM), or swapping to an LE5 or '07+ L61 block and matching ECM. Or, run the auto trans on a standalone controller.