How to make a 90 mpfi harness work in an 88?

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07-18-2007, 05:48 PM

Ogubudiah

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How to make a 90 mpfi harness work in an 88?

I can't find an 88 si/hf engine harness anywhere...
I have a pile of obd-0 mpfi engine harnesses, but they are all 90-91.

Anyone here made a 90 mpfi engine harness work in an 88?
Any known write-ups?

07-18-2007, 06:16 PM

Guy-Fast

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Re: How to make a 90 mpfi harness work in an 88?

if you have any hf harness's 90-91 Ill buy one that doesnt help much sorry

07-18-2007, 06:24 PM

Ogubudiah

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Re: How to make a 90 mpfi harness work in an 88?

haha no that doesn't help and I have no hf harnesses.
thanks?

07-18-2007, 07:10 PM

seerex

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Re: How to make a 90 mpfi harness work in an 88?

Just add it in you don't need to chage the hole thing out, just add the other stuff you need.

07-18-2007, 09:23 PM

turbozexcrxman

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Re: How to make a 90 mpfi harness work in an 88?

I had that same prob with mine.....turned out i could either pinout the connectors on the shock towers or i could change out the whole harness( which i did)....hope that helps any

07-19-2007, 12:40 AM

AgentMurdoc

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Re: How to make a 90 mpfi harness work in an 88?

just hack them up and make you 88 harness mpfi. Take your time and do it right, you shouldn't have a problem.

07-20-2007, 01:20 PM

seerex

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Re: How to make a 90 mpfi harness work in an 88?

I hope this helps, it a lot less work then it seems http://www.fourthgenhatch.net/mpfi.html

07-20-2007, 01:48 PM

bitchasscracker

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Re: How to make a 90 mpfi harness work in an 88?

Quote:

Originally Posted by Ogubudiah

I can't find an 88 si/hf engine harness anywhere...

i got 1

07-20-2007, 03:17 PM

Ogubudiah

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Re: How to make a 90 mpfi harness work in an 88?

Quote:

Originally Posted by bitchasscracker

i got 1

I have pm'd you numerous times with no response.
If you wanted to sell it you could pm me a price shipped...

07-20-2007, 04:41 PM

#10

md95ej1

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Re: How to make a 90 mpfi harness work in an 88?

Quote:

Originally Posted by turbozexcrxman

I had that same prob with mine.....turned out i could either pinout the connectors on the shock towers or i could change out the whole harness( which i did)....hope that helps any

it will run but have fuelcut and a ---- load of cel's.

i ended up building one from scrap plugs. took a while, and i thought my brain would fry but it ended up with no cel's.