HELP HELP wires r driving me nuts

78cobra347 · Nov 23, 2003

ok here's my problem

i have a 87 t/c donar car i pulled the ECM and its harness, thought that would be simple to put in the 89 2.3 n/a car
So far i noticed the coil plug is on the 89 harness but not on the t/c harness.
And on the t/c ECM harness it does not have the ECC plug for the scanner to pull codes.. What do i do about this problem?
any help would be so much apprecated

thx steve

78cobra347 · Nov 23, 2003

help stinger
would it be easier to follow your info on the 87 to 90 wiring info page?
Just use the lx harness and the 87 t/c LA2? what about the BAP sensor
will i need that in the 89 lx?

thx steve

140cilx · Nov 25, 2003

I'm not Stinger so pardon my intrusion.

All you need from the TC is the VAM wires. The few wires that go to the Vane Air Meter. That's it.

You don't need the BAP, you've got a MAP - same thing.

Yes, you use the swap info for the '87-90 LX.

Now just to mention, not to take away from Stinger's page ( I don't think he'd mind me telling you I did the basic write up for him on the '87-90's), but there's a lot of swap pages out there and some might help one person while another page helps another better. I've got a swap page, it's different than Stinger's, you've looked at his, give mine a look, maybe it will answer some more questions you have.

GT350r and Crovax, etc also have swap pages. You can find them in the members sticky thread and go to their websites.

Stinger · Nov 25, 2003

As carrot top already mentioned, you were just making it too difficult...just do it the way that you KNOW works (the way on all the pages) and throw that TC harness in the trash.

Stinger

140cilx · Nov 26, 2003

carrot top

Stinger · Nov 27, 2003

Slugstang · Jan 13, 2004

Sorry to butt into this thread but I was looking at both web sites and they state to unhook the MAP on an 89 car. Why is this? Is there a performance gain? Just wondering why this should be disconnected. The sites don't explain why.

Thanks

Mike

140cilx · Jan 13, 2004

because stock the MAP sensor is measuring the Atmosphere of the Intake system on an n/a car - which is a closed system, when you remove the vacuum line from it, it is measuring the atmosphere that the car is driving around in - and that's what the turbo computer requires, which is what the BAP sensor on the turbo cars do. They are the same thing w/ different names for different applications.

I'll make this part up some:
BAP means Barometric Air Pressure Sensor
MAP means Metered Air Pressure Sensor
(they mean something like that, but I forget).

-hope that helps.

Stinger · Jan 13, 2004

Because turbo cars run a BAP (barometric pressure) rather than a map (manifold pressure). Disconnect the vacuum line and bingo, instant bap.

Stinger

140cilx · Jan 13, 2004

oh yeah, and it (the computer) takes this measurement from the BAP (or former Map) to calculate the fuel curves. The measurement received allows for the computer to make the fuel curves as aggressive as possible (within stock parameters) with instant info from the Bap/Map.

GTPhreak · Jan 13, 2004

Stinger said:
Because turbo cars run a BAP (barometric pressure) rather than a map (manifold pressure). Disconnect the vacuum line and bingo, instant bap.

Stinger

But what if I am running a speed density turbo system?

Stinger · Jan 14, 2004

If speed density then it has to be a MAP...not a bap. It really needs to be a 2 or 3 bar MAP to work perfectly (without the help of an FMU).

Stinger

GTPhreak · Jan 14, 2004

i was being a smartass....you generalized "turbo cars" into one group

Stinger · Jan 15, 2004

Well now if somebody searches we've covered all the bases

HELP HELP wires r driving me nuts

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