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Will a DOHC ECU work w/ a SOHC motor?

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Old May 25, 2004 | 11:40 AM
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Default Will a DOHC ECU work w/ a SOHC motor?

i dont think it will but my friend thinks so. Will a P72 or a P61 work on a SOHC vtec motor? if it doesnt could you explain why...
thanks
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Old May 25, 2004 | 01:42 PM
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Default Re: Will a DOHC ECU work w/ a SOHC motor? (civicdohc)

no, fuel maps are wrong, abscense of dual runner intake manifold on the SOHC that the P72 will be looking for, knock sensor that the P72 will be looking for, crank flux sensor maybe, not sure if the P72 looks for that.
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Old May 25, 2004 | 01:44 PM
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It will work, just not well.
Your best bet is to buy a P28.
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Old May 25, 2004 | 03:04 PM
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Default Re: Will a DOHC ECU work w/ a SOHC motor? (PatrickGSR94)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PatrickGSR94 &raquo;</TD></TR><TR><TD CLASS="quote">no, fuel maps are wrong, abscense of dual runner intake manifold on the SOHC that the P72 will be looking for, knock sensor that the P72 will be looking for, crank flux sensor maybe, not sure if the P72 looks for that.</TD></TR></TABLE>

That's the reason right there.

But it's okay if you need the car running for a short period of time to get it somewhere like to another garage/home/etc.

I did that a few times. Car runs a bit funny.
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Old May 25, 2004 | 03:27 PM
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Default Re: Will a DOHC ECU work w/ a SOHC motor? (civicdohc)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civicdohc &raquo;</TD></TR><TR><TD CLASS="quote">i dont think it will but my friend thinks so. Will a P72 or a P61 work on a SOHC vtec motor? if it doesnt could you explain why...
thanks</TD></TR></TABLE>
IF you have a choice use the P61 over the P72. If the car is OBD1.
A) Because the P61 WON'T look for the IAB's. (B17's don't have them)
B) Because the P61 is for a 1.7L which is only slightly larger than the 1.6 SOHC.
C) Because the P61 was only OBD1.
HTH
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