General Will A 98 ECU work on a 95? (CAS difference)

[highboosted98]

I was wondering if my 98 TSi ECU would work in a 95 Talon TSi (originally EPROM). I know I have to change the firing order, but I realized that the 95`s have a internal CAS where as mine has a external CAS. I know it will work for mine because DSMLink has a "cam inverter" option.

I have tried doing a search but couldn't find anything . Could someone clear this up for me?
thanks

 

[doug]

It'll "work" but barely. A friend of mine with a 95 borrowed my stock 98 ECU (after I got a DSMLink ECU) and it would just barely run his car, even with the firing order switched.

 

[99gst_racer]

Yeah, it should work fine, but I believe the firing order is different. I think you have to switch the 1&2 wires and the 3&4 wires.

 

[highboosted98]

Yah i know about the firing order but isnt that because of the cas?

 

[Boosted98gsx]

when you do the opposite (95 in a 98), you need to invert the CAS signal or else you'll get random missfire CEL's, AND swap the plug wires.

 

[dave99gst]

when you do the opposite (95 in a 98), you need to invert the CAS signal or else you'll get random missfire CEL's, AND swap the plug wires.

^^what he said

 

[doug]

But he's putting a 98 into a 95. He'll have no way to invert the CAS signal.

 

[99gst_racer]

when you do the opposite (95 in a 98), you need to invert the CAS signal or else you'll get random missfire CEL's, AND swap the plug wires.

Wait a sec.... I'm not doubting you, but I have a 95 ECU in my 99 and I didnt need to invert the CAS signal (to my knowledge). I just swapped the plug wires and was good to go. Can you please futher explain this CAS signal inverting?? Thanks.

 

[Boosted98gsx]

you need to invert the CAS signal because the 97 is on the passenger side and the 95-96 ison the drivers side and you have an inverted signal. i dont know EXACTLY why it must be done, but i do know that until i inverted it, i was gettin random misfire CEL's and so was everyone else that uses dsmlink in the 2gb's

will someone back me up with the reason why?

 

[highboosted98]

I put the 98 ECU into the 95 today. I swapped wires for 1 and 3, 2 and 4. The car ran fine thanks. Now I got me an EPROM ECU I'll just use the inverted setting on DSMLink as well as swap my firing order.

 

[99gst_racer]

i was gettin random misfire CEL's and so was everyone else that uses dsmlink in the 2gb's

Do you need to invert the signal when using the EPROM w/ DSMlink?? Or just everytime you use an EPROM period? I have a 95 EPROM w/ a TMO chip and all I did was change my spark plugs around and my car runs fine. It just starts really hard.....

 

[98spydert]

Wait a sec.... I'm not doubting you, but I have a 95 ECU in my 99 and I didnt need to invert the CAS signal (to my knowledge). I just swapped the plug wires and was good to go. Can you please futher explain this CAS signal inverting?? Thanks.

Your profile says you have a stage 3 chip so if you told TMO you had a 99, they inverted the cas signal via the chip.

 

[Boosted98gsx]

Your profile says you have a stage 3 chip so if you told TMO you had a 99, they inverted the cas signal via the chip.

more than likely that's the case.

 

[99gst_racer]

Your profile says you have a stage 3 chip so if you told TMO you had a 99, they inverted the cas signal via the chip.

I didnt know they could do that via the chip. I learn something new everyday here. Thanks for your input.