High Idle, exhaust man glowing red

cre · 11-04-2009, 01:27 AM

When checking for codes the A/C must be OFF and you musn't press the throttle, either of these will set a code 51.

A false A/C signal to the ECU will set the A/C idle-up in the ECU causing an increase in idle when it's not really needed. The A/C idle increase is only a bump of a couple hundred RPM, not 1300.... if you've still got an idle of +2000RPM quit dicking around with the TPS and ISC.

Code 51 has absolutely nothing to do with the ISC... is there some other reason you're worried about that right now? Often they don't make any ticking noise because they need to be disassembled and thoroughly cleaned out.

***None of these has anything to do with a glowing manifold.***

I'm getting a bit confused here.... care to clean up your own thread a bit and tell us what you did and didn't manage to fix and why you're looking at some of this new stuff?

11-04-2009, 01:27 AM	#6
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	When checking for codes the A/C must be OFF and you musn't press the throttle, either of these will set a code 51. A false A/C signal to the ECU will set the A/C idle-up in the ECU causing an increase in idle when it's not really needed. The A/C idle increase is only a bump of a couple hundred RPM, not 1300.... if you've still got an idle of +2000RPM quit dicking around with the TPS and ISC. Code 51 has absolutely nothing to do with the ISC... is there some other reason you're worried about that right now? Often they don't make any ticking noise because they need to be disassembled and thoroughly cleaned out. *None of these has anything to do with a glowing manifold.* I'm getting a bit confused here.... care to clean up your own thread a bit and tell us what you did and didn't manage to fix and why you're looking at some of this new stuff?