3000GT/Stealth International Message Center - TPS (probably done to death)

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02-02-2005, 08:23 PM | #1

Killbilly
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Join Date: Feb 2003
Trader Rating: (0)

TPS (probably done to death)

I realise this has probably been asked a thousand times, but I couldnt find a step by step guide on how to set your TPS properly.
I think mine is way out and I think my CAS is out too.
So, if it's not too much to ask, can someone explain to me how to set both of these properly and and specialist tools (if any) that are required?
Cheers, sorry to bring this up as Im sure it's done to death.
-Paul

02-03-2005, 03:10 AM | #2

LUSTFUL
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Join Date: May 2003
Location: columbua ohio
Drives: 93 Dodge Stealth ES
Trader Rating: (0)

Re: TPS (probably done to death)

This is long, may want to print it out......
ADJUSTMENT OF IDLE POSITION SWITCH AND
THROTTLE POSITION SENSOR (TPS)
(1) Disconnect the throttle position sensor connector.
(2) Using jumper wires, connect an ohmmeter across terminal
3 (idle position switch) and terminal 4 (sensor ground) of
the throttle position sensor.
(3) Insert a 0.65-mm-thick feeler gauge between the fixed SAS
and throttle lever.
(4) Loosen the throttle position sensor mounting bolts and turn
the TPS body fully counterclockwise.
(5) In this condition, check that there is continuity across
terminals 3 and 4.
(6) Slowly turn the throttle position sensor clockwise until you
find a point at which there is no continuity across terminals
3 and 4. Then, tighten the throttle position sensor
mounting bolt securely.
(7) Connect the throttle position sensor connector.
(8) When using the multi-use tester, connect it to the diagnosis connector.
(9) When not using the multi-use tester, proceed as follows:
*Disconnect the throttle position sensor connectors and
connect the special tool, Test Harness Set, between
the disconnected connectors.
*Connect a digital voltmeter between the throttle position
sensor terminal 2 (sensor output) and teminal 4 (sensor ground).
(lO)Turn the ignition switch ON (but do not start the engine).
(11) Check the throttle position sensor output voltage.
When using the multi-use tester, select item No. 14 and
read the throttle position sensor output voltage.
Standard value: 400 - 1,000 mV
(12)lf the voltage is out of specification, check the throttle
position sensor and associated harnesses.
(13)Remove the feeler gauge.
(14)Turn the ignition switch OFF.
ADJUSTMENT OF FIXED SAS
(A) The fixed SAS has been factory-adjusted. Never attempt to
move it.
(B) Should it be out of proper adjustment, adjust by following
the procedure given below.
(1) Sufficiently slacken the accelerator cable.
(2) Loosen the lock nut on the fixed SAS.
(3) Sufficiently loosen the fixed SAS by turning it counterclockwise
to fully close the throttle valve.
(4) Tighten the fixed SAS slowly to find a point at which it
contacts the throttle lever (where the throttle valve starts
opening). From that point, tighten the fixed SAS further 1 l/4
turns.
(5) Holding the fixed SAS to prevent it from turning, tighten the
lock nut securely.
(6) Adjust the accelerator cable tension.
(7) Adjust the basic idle speed.
(8) Adjust the idle position switch and throttle position sensor
(TPS).
BASIC IDLE SPEED ADJUSTMENT
NOTE
(A) The basic idle speed has been factory-adjusted with the
speed adjusting screw (SAS) and does not normally require
adjustment.
(B) If the adjustment is required, first check that the ignition
plug, injector, ISC servo, and compression pressure are
normal.
(1) Before starting the inspection and adjustment procedures,
set the vehicle in the following conditions:
*Engine coolant temperature: 80 to 95°C (176 to 205°F)
*Lights, electric cooling fan, accessories: OFF
*Transaxle: Neutral (P range on vehicles with automatic
transaxle)
*Steering wheel: Straightforward position
(2) When using the multi-use tester, connect it to the diagnosis
connector.
NOTE
The connection of the multi-use tester grounds the selfdiagnosis/
data transmission selector terminal.
(3) When not using the multi-use tester, proceed as follows:
*Insert a paper clip into the l-pin blue connector
*Connect a primary-voltage-detecting tachometer to the
paper clip.
NOTE
The tacho/neter should read l/3 of the actual engine
speed. This means that the actual engine speed is the
tachometer reading multiplied by 3.
*Using a jumper wire, ground the self-diagnosis/data
transmission selector terminal (terminal 10) of the
diagnosis connector (white).
(4) Remove the waterproof female connector from the ignition
timing adjusting connector (brown).
(5) Using a jumper wire, ground the ignition timing adjusting
terminal.
(6) Start the engine and run at idle.
(7) Check the basic idle speed.
When using the multi-use tester, select item No. 38 and
read the idle speed.
Basic idle speeci: 700 + 50 rpm
NOTE
(A) The engine speed may be low by 20 to 100 rpm while
the vehicle is new [distance driven approx. 500 km (300
miles) or less], but no adjustment is necessary.
(B) If the engine stalls or speed is low despite a sufficient
distance driven [approx. 500 km (300 miles) or more], it
is probably due to deposits on the throttle valve. In this
case, clean the throttle valve.
(8) If the basic idle speed is out of specification, adjust by
turning the speed adjusting screw (SAS).
NOTE
If the idle speed is higher than the standard value even with
SAS fully tightened, check to see if there is evidence of the
idle switch (fixed SAS) being moved. If the idle switch
seems to have been moved, adjust it. If it does not seem to
have been moved, there may be a leak caused by
deteriorated fast idle air valve (FIAV). In such a case, replace
the throttle body.
(9) Turn the ignition switch OFF.
(lO)When the multi-use tester has not been used, remove the
jumper wire from the self-diagnosis/data transmission
s e l e c t o r t e r m i n a l .
(11)Remove the jumper wire from. the ignition timing adjusting
terminal and replace the connector back again.
(12)Start the engine again and run at idle for 10 minutes to
make sure that the engine runs at proper idle speed.
that is for the TPS
__________________
'93 Dodge Stealth ES: BPU and a bit more maybe

02-03-2005, 08:47 AM | #3

Killbilly
Forum user
Join Date: Feb 2003
Trader Rating: (0)

Re: TPS (probably done to death)

Thanks HEAPS mate! I really appreciate it.
There's no DOHC 24v 6G72's in australia (except in the occasional GTO's that are imported) so noone here can help me with fixing stuff.
Any info on the CAS if you dont mind?
Thanks again

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