srey
Wombat
- Joined
- Jan 4, 2006
- Messages
- 13
- Reaction score
- 0
- Points
- 1
- Location
- Hawkesbury
- Website
- www.farkin.net
- Members Ride
- VR Wagon
Yay for TLAs! 
Well, as I mentioned in another thread, my VR (dual fuel) is running rough just off idle and even stalling, and hunting when it's cold; more noticably on petrol than on LPG.
I've only had the car for a couple of months, so I took it to the mechanic to have it fully checked out, and see if he could figure out what this problem is.
The error code that it was spitting out was 23, Mainfold Air Temp sensor error. The first problem was that for some reason, there was no plug on the MAT sensor, in fact the plug had been cut off the loom. I got the auto electrician to wire a plug back on and the sensor is now hooked up.
Still getting the same error code though. My next thought was that the sensor itself is a bit funky, and needs to be replaced. I thought I'd check the reference voltage first though, which according to the service manual I've got should be 5V, and I found that it is in fact only about 5 mili-volts.
That voltage is meant to be supplied by the PCM, so obviously something is going wrong there.
What I want to know is firstly, has anyone encountered problems like this before?
Can the PCMs be worked on (obviously by a professional) or are they a throw away unit? (I have a feeling they're not cheap to replace either).
Is a faulty MAT sensor likely to be causing the problems I've having? The problem is definately more prevelant when the car is cold, so it makes sense to me that a temp sensor could be playing a part in it. I have feeling it might be running rich though because I noticed a pretty strong petrol smell when I started it up this morning.
This is starting to drive me insane, so if anyone can help it would be awesome!
Cheers, Shayne.
Well, as I mentioned in another thread, my VR (dual fuel) is running rough just off idle and even stalling, and hunting when it's cold; more noticably on petrol than on LPG.
I've only had the car for a couple of months, so I took it to the mechanic to have it fully checked out, and see if he could figure out what this problem is.
The error code that it was spitting out was 23, Mainfold Air Temp sensor error. The first problem was that for some reason, there was no plug on the MAT sensor, in fact the plug had been cut off the loom. I got the auto electrician to wire a plug back on and the sensor is now hooked up.
Still getting the same error code though. My next thought was that the sensor itself is a bit funky, and needs to be replaced. I thought I'd check the reference voltage first though, which according to the service manual I've got should be 5V, and I found that it is in fact only about 5 mili-volts.
That voltage is meant to be supplied by the PCM, so obviously something is going wrong there.
What I want to know is firstly, has anyone encountered problems like this before?
Can the PCMs be worked on (obviously by a professional) or are they a throw away unit? (I have a feeling they're not cheap to replace either).
Is a faulty MAT sensor likely to be causing the problems I've having? The problem is definately more prevelant when the car is cold, so it makes sense to me that a temp sensor could be playing a part in it. I have feeling it might be running rich though because I noticed a pretty strong petrol smell when I started it up this morning.
This is starting to drive me insane, so if anyone can help it would be awesome!
Cheers, Shayne.
