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#1 |
500whp yet?
Join Date: Aug 2005
Location: Plantation, Fl.
Posts: 1,052
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Code 41 is a fault in the throttle position sensor signal.
Possible trouble points:
Possible trouble points:
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#2 |
3" Exhaust
Join Date: Mar 2008
Location: Cali
Posts: 76
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tested everything in the afm, all in spec
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Cometic MHG, ARP studs, H&R lowering springs |
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#3 |
3" Exhaust
Join Date: Mar 2008
Location: Cali
Posts: 76
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ok, got some alligator clips and tested the operation of the isc. unless it is supposed to move a lot, I think it is frozen. when I ground the s terminals, the valve twitches but doesn't actually move...
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Cometic MHG, ARP studs, H&R lowering springs |
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#4 |
Intake
Join Date: Nov 2007
Location: Plano, TX USA
Posts: 33
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I realize it has been a year since your post, but thought I would tell you what I know about the Idle Speed Control Valve. I am trying to solve a loping idle problem and when checking the ISC, I thought it wasn't moving until I realized that you must repeat the sequence S1-S2-S3-S4---S1-S2-S3-S4 over and over. With each sequence it will move slightly out. When you reverse the sequence S4-S3-S2-S1 (over and over) it will move back in.
By the way, anyone have a clue on intermittent loping idle around 500-600 rpm? Not getting any codes and ISC checks OK. TPS also checks out ok per TSRM. I have looked for vacuum leaks, but no luck except there is a hissing sound around the EGR vacuum regulator that I cannot pinpoint. I will check the EGR vacc reg per the TSRM (EC-13).
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1988 MK3 Supra; 7M-GE; Automatic; Sport Roof; Factory Original Last edited by bills1988; 06-15-2009 at 08:57 PM. Reason: add TPS check |
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