Yellow Rose
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How is idle adjusted on a throttle-by-wire NSX?
Idle Adjustment
- Thread starter Yellow Rose
- Start date
From other discussions here on Prime, you disconnect the EACV set the base idle with the bypass screw and then reconnect the EACV. Doing that really only sets up the control system, the actual speed is controled by the ECU with the EACV to 800 +- 50 RPM on a manual trans car.
Andy, isnt the adjustment screw 'waxed'from the factory.I want to do this also as I want to clean out that area but when I found it waxed in postion decided to leave it be and just clean the internal portion or the T/B. please post your findings.
best regards david
best regards david
Also, the screw has a sealant on the threads to keep from backing out. If you do adjust the screw, put a blob of grey silicone sealant on the head so it stays put.
Andy, this is what I wrote in an older thread:
The right procedure: Warm up the engine, all load (fan, A/C stereo etc.) off, then engine off. Pull the EACV plug (beneath the throttle body, 4 or 5 pins AFAIK). Start engine with slightly pressed pedal. Release pedal. Adjust idle on the idle bypass adjust srew (on the '98 model it looks to the driver side, you nearly can't see it from above the throttle body). rpm should be 650 +/- 50 rpm. Engine off. Pull clock fuse for at least 10 seconds (ECU reset). Start engine, look what happens. rpm should be stable at around 850. Rev up to high rpm, release pedal quickly. rpm should not fall under 850. In my case it rests a second or so at about 1,100 and then goes down to normal idle - for me and my track car quite okay.
The right procedure: Warm up the engine, all load (fan, A/C stereo etc.) off, then engine off. Pull the EACV plug (beneath the throttle body, 4 or 5 pins AFAIK). Start engine with slightly pressed pedal. Release pedal. Adjust idle on the idle bypass adjust srew (on the '98 model it looks to the driver side, you nearly can't see it from above the throttle body). rpm should be 650 +/- 50 rpm. Engine off. Pull clock fuse for at least 10 seconds (ECU reset). Start engine, look what happens. rpm should be stable at around 850. Rev up to high rpm, release pedal quickly. rpm should not fall under 850. In my case it rests a second or so at about 1,100 and then goes down to normal idle - for me and my track car quite okay.
Yellow Rose
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Where is this screw?
I do not have the service manual for a throttle-by-wire NSX.
I do not have the service manual for a throttle-by-wire NSX.
It's on the lower part of the throttle body - pointing towards the front of the car (driver's side). I have no digital camera - maybe someone else could post a pic.
BTW: I forgot to wrote in my previous post: Replug the EAVC plug before you replug the clock fuse again.
BTW: I forgot to wrote in my previous post: Replug the EAVC plug before you replug the clock fuse again.
