Code 7/ Switched TPS
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Joined: Jul 2005
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Code 7/ Switched TPS
Ok, I just swapped the stock motor for a B16A and have the common code 7 that results from the TPS in a lot of them. Getting the black smoke, smells rich, all the standard symptoms of a bad TPS. The only problem is, the TPS has been switched out several times in a vain hope that I was just having bad luck. Then we put in my friends good TPS and it's still throwing that code 7. Everything seems to check out in the numbers, and quite frankly, we're stumped by this. The car runs great as it is, we did have to switch out the CPU because of a hesitation and that worked fine for that problem, but the code 7 just won't go away. Anyone have any other suggestions or recommendations to try? My friend owns a Honda shop and has done many such swaps, and this one just has us both a bit confused. Thank you.
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Joined: Sep 2002
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From: Colorado Springs
only 3 possibilities - problem in the wiring - bad TPS (doubtful) or TPS not adjusted correctly - was this a DPFI to MPFI swap? if so, were the yellow and green wires swapped? have you checked voltage on the TPS? have you tried a different throttle body with TPS that hasn't been screwed with?
by the way, most common symptom for bad TPS is that it won't rev up - black smoke and smells rich are symptoms of faulty fuel pressure regulator or MAP sensor, not TPS - 90% of JDM engines that we get have a bad fuel pressure regulator - they seem to quit working after sitting for a long time and won't return unused fuel to the tank
the common problem with code 7 is not with the TPS, but is usually caused by installation and/or wiring by someone that doesn't know what they are doing - we have done over 60 swaps of all kinds of engines, ZC, B16, B18, H22, etc. in all models of Hondas and Acuras and we have never started one up and had code 7 - have had a lot of B16s with code 4 or 8 (they all seem to have bad distributors) - we have fixed a lot of them that other people did the swap on that had all kinds of codes, usually traceable to the wiring and wrong connectors plugged into sensors or sensors not connected at all
by the way, most common symptom for bad TPS is that it won't rev up - black smoke and smells rich are symptoms of faulty fuel pressure regulator or MAP sensor, not TPS - 90% of JDM engines that we get have a bad fuel pressure regulator - they seem to quit working after sitting for a long time and won't return unused fuel to the tank
the common problem with code 7 is not with the TPS, but is usually caused by installation and/or wiring by someone that doesn't know what they are doing - we have done over 60 swaps of all kinds of engines, ZC, B16, B18, H22, etc. in all models of Hondas and Acuras and we have never started one up and had code 7 - have had a lot of B16s with code 4 or 8 (they all seem to have bad distributors) - we have fixed a lot of them that other people did the swap on that had all kinds of codes, usually traceable to the wiring and wrong connectors plugged into sensors or sensors not connected at all
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Thanks for the reply. I haven't even been able to check the boards. The other car got broken into... go figure. That is great information. I'll have to do a check and see what I can find in that. Thank you for your reply and I'll certainly post what I find. Others may find it useful.