In my quest to hopefully one day cure the rough idle my truck has, only
during cold startups, I am going to install yet another sensor tomorrow. I
had to order this sensor, which is a Borg Warner Select product and will
cost about $52 from Pep Boys. Typically, they carry this sensor in stock,
but are sold out. Odd eh?
Using the info Rich sent me:
Warm-up mode is an Open Loop mode in which the PCM receives signals from the
following inputs:
-Battery Voltage........mine is perfect
-Crankshaft Position Sensor........this will be next after the MAP
-Engine Coolant Temperature Sensor......replaced for $11, no change in idle
-Manifold Absolute Pressure Sensor (MAP)..... replacing this tomorrow
-Throttle Position Sensor (TPS)......replaced for $30, no change in idle
-Park/Neutral Switch (auto. trans. only).........read my other starting
problem post
-Air Conditioning Select/Request Signal (if equipped)......don't have A/C
"Based on these inputs the following occurs:
* Voltage is applied to injectors with the PCM. The PCM controls sequence
and pulse width by switching on/off the ground to each injector.
* The PCM adjusts idle through the idle air control (IAC) motor and adjust
timing.
* The PCM operates the A/C thorugh the clutch relay.
* When engine reaches normal operating temperature, the PCM will begin
monitoring the O2S sensor input, and switch from Open Loop to Closed Loop
operation."
I will try the MAP, as some with newed Daks did(which I think cured the
rough idle problem), and see how things go. I will of course post an update
if changes occur. Nex sensor on the list will be the Crankshaft Position
Sensor.
Kyle
93 Dakota 4x4 V6
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:52:54 EDT