Decelleration, High Idle .. weird stuff ... - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Sidewayzzz · 11-19-2006, 10:16 PM

Well today was a busy day, I took off the throttle body to set the adjustment screws for the idle and wot. I set so that when i snapped it open/close it didn't click (the way the FSM describes to do it). I figured while I had it out I should set the TPS to the correct spec, so i set it to .45 closed and rotated the set screw on the TB so that it was all the way out, and my TPS only goes to 4 volts and change WOT...I believe it should be 5, but thats not really important.

I checked the timing, it was 15 degrees BTDC which is 5 off, so I set it to 20 degrees, which is stock.

Bypassed the coolant lines, I don't need those. I also plugged the 4 vacuum lines I had previously when I had the AIV and Vacuum Canister (they were previously plugged at the end of the hoses, this time I did it right from the hard lines).

I want to make it known that I have replaced FPR, TPS, o2 Sensor, MAF, ECU, and the Plugs all within maybe 5-6 months. That's not to say they are not bad, but I have done more than a few things under the hood and this problem is just .. weird and unusual.

SO after all that mess, It doesn't try to die coming to a stop anymore, it doesn't go much lower then 600 rpms (and thats only sometimes...) when I pull it out of gear. What it does do thats strange is it idles at 1000, but if I pull it out of gear or press the clutch in while coming to a stop, BEFORE I come to a complete stop, it will idle at 750 and while i'm coming to a stop it rises and by the time I stop its at 1000.

To be more specific, I was on the 95 and doing about 65-75 and pulled out of gear ... rock solid at 750 for a good few seconds. When I came home, I flipped a u-turn to park and when I took it out of 2nd to come to a stop, it went to 750 and while I was braking it came up to 1000 by the time I came to a stop.

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11-19-2006, 10:16 PM	#3
Sidewayzzz Zilvia Member Join Date: Mar 2006 Location: Vegas Age: 39 Posts: 221 Trader Rating: (0) Feedback Score: 0 reviews	Well today was a busy day, I took off the throttle body to set the adjustment screws for the idle and wot. I set so that when i snapped it open/close it didn't click (the way the FSM describes to do it). I figured while I had it out I should set the TPS to the correct spec, so i set it to .45 closed and rotated the set screw on the TB so that it was all the way out, and my TPS only goes to 4 volts and change WOT...I believe it should be 5, but thats not really important. I checked the timing, it was 15 degrees BTDC which is 5 off, so I set it to 20 degrees, which is stock. Bypassed the coolant lines, I don't need those. I also plugged the 4 vacuum lines I had previously when I had the AIV and Vacuum Canister (they were previously plugged at the end of the hoses, this time I did it right from the hard lines). I want to make it known that I have replaced FPR, TPS, o2 Sensor, MAF, ECU, and the Plugs all within maybe 5-6 months. That's not to say they are not bad, but I have done more than a few things under the hood and this problem is just .. weird and unusual. SO after all that mess, It doesn't try to die coming to a stop anymore, it doesn't go much lower then 600 rpms (and thats only sometimes...) when I pull it out of gear. What it does do thats strange is it idles at 1000, but if I pull it out of gear or press the clutch in while coming to a stop, BEFORE I come to a complete stop, it will idle at 750 and while i'm coming to a stop it rises and by the time I stop its at 1000. To be more specific, I was on the 95 and doing about 65-75 and pulled out of gear ... rock solid at 750 for a good few seconds. When I came home, I flipped a u-turn to park and when I took it out of 2nd to come to a stop, it went to 750 and while I was braking it came up to 1000 by the time I came to a stop.