Pasta_Ricer
Proven Member
- 45
- 2
- Nov 2, 2021
-
Zanjan,
Asia
Hi everyone!
So, I have '91 Galant GTI-16V which I recently got and I've been battling some wiring and mechanical issues since I got it. One of my main problems is my weird idle which I'm in the process of fixing (cleaned the horribly dirty IAC stepper motor, cleaned the throttle body, adjusted the throttle cable, and adjusted the TPS to 0.63V).
My main concern is the IPS. The connector had broken off and the previous owner had just twisted the wire from the harness to a piece of wire that was wrapped around the late switch's terminal. As an electronics engineer, this made me cringe big time. I soldered the wire on the IPS and tried to test the voltage on the wire and well, I get nothing. 0.001V which is basically down in the noise. I get the same when off and even when on.
It's even the same when the harness isn't even connected to the switch so it rules out the switch being shorted to the ground.
I also get bad idling when I turn on the AC or sometimes when suddenly engaging the clutch and lifting the throttle.
Since the car has two sensors to check for the closed position of the throttle body, is this normal?
Does the ECU only check the IPS by applying a voltage to it occasionally when you get off the throttle?
Is it used in case the TPS gives erroneous values?
I appreciate any info regarding the workings of the IPS as there isn't a ton of info.
Thanks in advance <3
So, I have '91 Galant GTI-16V which I recently got and I've been battling some wiring and mechanical issues since I got it. One of my main problems is my weird idle which I'm in the process of fixing (cleaned the horribly dirty IAC stepper motor, cleaned the throttle body, adjusted the throttle cable, and adjusted the TPS to 0.63V).
My main concern is the IPS. The connector had broken off and the previous owner had just twisted the wire from the harness to a piece of wire that was wrapped around the late switch's terminal. As an electronics engineer, this made me cringe big time. I soldered the wire on the IPS and tried to test the voltage on the wire and well, I get nothing. 0.001V which is basically down in the noise. I get the same when off and even when on.
It's even the same when the harness isn't even connected to the switch so it rules out the switch being shorted to the ground.
I also get bad idling when I turn on the AC or sometimes when suddenly engaging the clutch and lifting the throttle.
Since the car has two sensors to check for the closed position of the throttle body, is this normal?
Does the ECU only check the IPS by applying a voltage to it occasionally when you get off the throttle?
Is it used in case the TPS gives erroneous values?
I appreciate any info regarding the workings of the IPS as there isn't a ton of info.
Thanks in advance <3