can I use 87 tpi harness with 91 map ecm?
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Joined: Oct 2009
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From: Los Angeles
Car: 240sx
Engine: 327sj(334) sbc , tpi, turbo
Transmission: tko500
Axle/Gears: 3.54 31 spline axles
can I use 87 tpi harness with 91 map ecm?
I have a 240sx with v8 and need TPI with all the smog stuff to pass smog ref.
got a wrecked 87 5.7L firebird to pull the intake and smog equipment from.
i know i need a new ecm but would the MAF harness work with some modification. or is it better to buy the whole harness for MAP and plug into my 87 TPI intake.
doing this on a budget. done a decent bit of wiring but my knowledge is severely limited .
got a wrecked 87 5.7L firebird to pull the intake and smog equipment from.
i know i need a new ecm but would the MAF harness work with some modification. or is it better to buy the whole harness for MAP and plug into my 87 TPI intake.
doing this on a budget. done a decent bit of wiring but my knowledge is severely limited .
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Re: can I use 87 tpi harness with 91 map ecm?
It is a bit of work, but here is how it is done:
http://www.eecis.udel.edu/~davis/z28/ecm_swap_730/
RBob.
http://www.eecis.udel.edu/~davis/z28/ecm_swap_730/
RBob.
Thread Starter
Junior Member
Joined: Oct 2009
Posts: 11
Likes: 0
From: Los Angeles
Car: 240sx
Engine: 327sj(334) sbc , tpi, turbo
Transmission: tko500
Axle/Gears: 3.54 31 spline axles
Re: can I use 87 tpi harness with 91 map ecm?
thanks,
yes that does seem like a bit or work.
will the 91 harness plug into my 87 intake and all the sensors that come with it including smog?
assuming that I need a map sensor in addition.
yes that does seem like a bit or work.
will the 91 harness plug into my 87 intake and all the sensors that come with it including smog?
assuming that I need a map sensor in addition.
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Joined: Jul 1999
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From: Panama City FL
Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: can I use 87 tpi harness with 91 map ecm?
Yes you will have to wire in the MAP circuit (I used the old MAF wires) and also the knock sensor circuit is different. With the 91 ECM you will need to use a 91 knock sensor. Just have to modify the 87 harness to have the knock sensor go directly to the ECM instead of through the ESC module that the 87 uses.
Thread Starter
Junior Member
Joined: Oct 2009
Posts: 11
Likes: 0
From: Los Angeles
Car: 240sx
Engine: 327sj(334) sbc , tpi, turbo
Transmission: tko500
Axle/Gears: 3.54 31 spline axles
Re: can I use 87 tpi harness with 91 map ecm?
now that does not sound so difficult. what about all the smog equpiment? I am assuming from what I have seen in the chilton that it is all the same between the two years. in the chilton it looks like it would be a few more wires than that,
but it looks doable.
thanks
but it looks doable.
thanks
Last edited by 540sx!; Oct 28, 2009 at 01:30 AM.
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