Ls ecu question. Need help

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06-25-2011, 02:44 PM

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Needfstwheelz

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Ls ecu question. Need help

Sup TR. I recently picked up a 1991 Integra GS that has been converted to obd1. Problem im having is that the car will randomly break up between 2-3k rpms....I thought it might be my wires but i changed em nothing happened. I believe I am running on a single cam dizzy(IDK WTF is up wit that) so I thought maybe the dizzy...but i plugged up a obd1 LS dizzy and the car wouldnt start.

Now I look at the ecu and I am running on a pr4-ao2. I kno it is obd0 but what application is it exactly for? I plugged up an obd0 pr4-ao1 and it appears my problem is gone....Havent driven around town but got it up 2 4500 rpms with no sign of breaking up...

Is a PR4-AO2 automatic by chance?
The PR4-AO1 came from my 1990 5 speed LS

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06-26-2011, 04:37 PM

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mtber

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What distributor are you running?
You must run an obd1 or obd2 distributor with an obd1 ecu in order for the car to run properly.
You should run an obd0 distributor with an obd0 ecu.

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06-26-2011, 06:16 PM

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flatrex

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Yeah I'm confused. You came by the shop and we plugged in an obd1 working ls dizzy. But you have an obd0 ecu? I guess the question is do you just need a jumper harness, or did the previous owner wire up an obd1 dist. and obd1 plugs....... Your best bet might be to find an obd0 dist. and make the car back to stock with the correct engine harness plugs.

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Last edited by flatrex; 06-26-2011 at 06:21 PM.

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06-27-2011, 06:51 AM

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Needfstwheelz

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Quote:

Originally Posted by mtber

What distributor are you running?
You must run an obd1 or obd2 distributor with an obd1 ecu in order for the car to run properly.
You should run an obd0 distributor with an obd0 ecu.

Td42u is enggraved on my dizzy...I kno I need the obd1 ecu atleast...the dizzy situation, i need to try another one because FLATREX said he is sure his worked, but im praying it went bad and another 1 will work