1G 1999 GSX ECU in 1995 TSi and have no spark

[overboosted1g]

I installed a 99 GSX ECU in a 95 Talon. The Talon is a awd auto converted to manual running a 7 bolt with 1g CAS.

Put the flashable ECU with factory ROM and no start or spark. Reflashed the ECU with ceddyrom and still no start or spark. Re-installed EPROM ECU (was running on this) and it starts fine. Put the flashable back in and no spark.

If we turn the CAS by hand, with out cranking and the key on, the car produces spark. While cranking with the starter the car will not produce spark. Is there something we are missing?

The car has 12 volts at the coil and at the CAS and it is still there while cranking.

As a test we pulled a 99 2.4 Spyder ECU, unflashed and working, put it in and cranked with no spark.

 

[etay89]

Have you tried changing the firing order? I know the firing order in 95/96 differ from 97-99. I know looking at the motor, the firing order is 4-3-2-1 left to right and 4-1-2-3 left to right on the coil pack (4 obviously being the longest plug). Give that a shot maybe?

 

[overboosted1g]

So if you crank it and spin the CAS, no spark. But if you spin the CAS and crank it you get no cranking.

 

[crash89]

^^ What!?!?! 0_o

The 2ga CAS signals are inverted compared to the 2gb's. Which means, if you use a 2gb or a 1g CAS in a 2ga you need to swap the plugs. Such as etay89 said. Instead of a normal plug order (left to right) 4123 you need to go 2314.

 

[etay89]

^^ What!?!?! 0_o

The 2ga CAS signals are inverted compared to the 2gb's. Which means, if you use a 2gb or a 1g CAS in a 2ga you need to swap the plugs. Such as etay89 said. Instead of a normal plug order (left to right) 4123 you need to go 2314.

For my future knowledge, the firing order is about the CAS, not the ECU?

So if I took 95 EPROM ECU and put it in a 99 with stock 7 bolt, nothing would change, but if I took a 95 EPROM and put it in the 99 stock 7 bolt with a 2ga/1g CAS, then the firing order changes?

 

[crash89]

A 2ga ECU will require inverting the plug wires if you are using it with a 2gB CAS. Or the other way around, 2gb ECU with a 2gA CAS.