Disconnecting TPS? - Nissan Forum
GA16DE 1.6L Engine Engine Discussion: 91-99 Sentra, 95-98 200SX, 91-93 NX1600

 
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#1 Old Jul 9th, 2007, 06:46 PM
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Disconnecting TPS?

I was just wondering, what is the purpose of disconnecting the throttle position sensor when adjusting the timing on an engine?
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#2 Old Jul 9th, 2007, 07:27 PM
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Disconnecting the TPS allows the timing and idle to be set properly. When it is connected again, the ECU will take into the account the position of the throttle plate.
#3 Old Jul 9th, 2007, 08:48 PM
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The reason I asked was because when I disconnected the TPS, the timing marks advanced past the limits of the movable rotor asembly. When I hooked up the TPS, the marks moved within range of where I could align the marks, so I left the TPS connected while setting the timing. Was this wrong? If so, what did I do wrong, and why did the timing marks move out of range when the TPS was disconnected?
#4 Old Jul 10th, 2007, 07:01 PM
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i also did this same thing and it happened to myself. and my rpms went up to 1900 rpms. so i just plugged the tps back in and the timing was only off by about 4 degrees. :S
#5 Old Jul 10th, 2007, 07:50 PM
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oh god. ok go read my post on the definitive guide on how to adjust the timing. then come back. you can't miss my post, its the first post in this forum board. you guys aren't even doing it properly.
#6 Old Jul 10th, 2007, 11:58 PM
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i did it exactly how it said on the post...after disconnecting the tps it reved up to 2000 rpm....which isn't idle...and the timing was WAY off....so i tried hooking the tps back up and well....look at that....i could find the timing marks easily
#7 Old Jul 12th, 2007, 04:57 PM
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okay FIRST:
REV TO 3000 RPM THREE TIMES WITH YOUR TPS DISCONNECTED AND LET IDLE SETTLE
ADJUST IDLE WITH IDLE SCREW
THEN ADJUST TIMING

whatever, your timing is WRONG and so is your idle. so did the timing marks stay in one place with the TPS back on, or did it JUMP everywhere when using your timing light?
#8 Old Jul 12th, 2007, 06:29 PM
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i used the all knowing "alldata" that we have at my workplace and it doesn't say anything about reving it up or even unplugging the fan...the instruction on that software was tolet it warm up...disconnect tps and check the timing....so that's how i did it the first time...then i seen the way it was posted on here and it still didn't work with the tps disconnected....so im confused and puzzled...:S
#9 Old Jul 17th, 2007, 09:49 AM
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whatever. if you can't follow simple directions, i can't help you. good luck.
#10 Old Jul 25th, 2007, 02:26 AM
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Buy a FSM...
#11 Old Oct 30th, 2008, 12:53 PM
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Unhappy

when Disconnect the tps car does not want to stay on. does anyone know the problem.
#12 Old Oct 30th, 2008, 04:05 PM
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never did this with the car running so dont know if normal.
You adjust the TPS position with the car running.
What are you trying to do ?

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#13 Old Oct 30th, 2008, 07:59 PM
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IM TRYING TO SET THE TIMMING AND THE IDLE. I WARM UP THE CAR AND THAN I SHUT IT OFF AND DISCONNECT THE TPS TURN THE CAR ON REV IT 3TIMES TO 3000 RPMS AND WHEN I STOP GIVING IT GAS IT SHUTS OFF WHY?
#14 Old Oct 30th, 2008, 11:49 PM
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Did you adjust the idle speed, once the computer is not controlling the timing and idle through the IACV you must set the idle speed to spec.

2003 Pathfinder from 2004 SE 4WD
1997 SER 5sp Manual from new Rear Ended 2009 !!
Gone to the Knacker yard...
New ride 3.0 manual RWD not a Nissan !!!
1997 Sentra GXE from new .... Sold 2008
2001 Sunny N16 RHD from new (N16 Nissan Bluebird Sylphy) Sold
#15 Old Oct 31st, 2008, 10:12 AM
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what do u mean i thought that's the way you adjust the idle speed, my idle speed is at 900rpm.
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