PR4 Code 8

s300 and SManager software questions & answers
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PeterD
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Joined: Thu Jul 07, 2022 8:33 pm

PR4 Code 8

Post by PeterD »

Hi there I'm getting a Code 8 TDC hard fault-as in the code comes back immediately. It's a 1990 civic with a B18A1 turbo OBD0 to OBD1 swap PR4 ECU. I've checked the wires from the ECU to the dizzy and they're good and the timing is set. I've also tried a new dizzy. The car will run and drive okay with the CEL on but under heavier loads (generally over 110kPa) it will cut the injectors in and out, TPS stays consistent. Wondering if this is a limp mode and how I can possibly fix the CEL.
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Spunkster
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Posts: 22739
Joined: Fri Sep 20, 2002 5:06 pm
Location: Hondata

Re: PR4 Code 8

Post by Spunkster »

Try the ECU in a known working vehicle and see if you have the same error, if you do the ECU may be damaged. If the problem does not follow the ECU then you have either a mechanical or wiring related problem in your car.
PeterD
Posts: 2
Joined: Thu Jul 07, 2022 8:33 pm

Re: PR4 Code 8

Post by PeterD »

So I've tried a new ecu, a new distributor, and ran new wires bypassing the connectors in the car. Tried with the base timing connector jumpered and un-jumpered. Kinda out of ideas now...
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Spunkster
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Posts: 22739
Joined: Fri Sep 20, 2002 5:06 pm
Location: Hondata

Re: PR4 Code 8

Post by Spunkster »

Have you tried your ECU in a known working vehicle?
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