CJM
Dr. Diesel
Please remember to wear gloves when handling the cleaner solutions mentioned below
MAF SENSOR
The MAF Sensor is located here
Personally I removed the air-box, but you do not need to, to remove the MAF Sensor. However you will need to get/use a 5 pointed security torx with a hole in the middle, to undo the screws. I got mine from Ebay.
Once removed you need to use MAF cleaner, it is important to use MAF cleaner and not something like brake cleaner, as this could do damage to the plastics and possibly the sensor!.
Pic of the rear of the MAF Sensor
Firstly you need to clean the IAT sensor indicated by the arrow, spray the cleaning fluid on liberally, being careful not to hit the wire with the straw on the MAF Cleaner, ensure whole wire is cleaned.
Next in the middle of the sensor you will see a metal plate, again spray this liberally
Finally you need to clean the hot-wire (I think) which is visible at the end of the sensor,again spray liberally, be careful however, don't stick the straw from the spray in the recess. Apologies for the picture all you can see is the edge of some metal, however you should see a thin wire in-between, when looking at your sensor.
Now the most important thing, don't refit yet, leave to dry, I left mine to dry for a while and then used a hair dryer on a low temp setting to ensure the sensors were dry.
I also personally cleaned inside the air-box where the MAF Sensor goes.
MAP SENSOR (Including second IAT sensor)
The MAP Sensor is located here on top of the IMRC Valve.
It is fairly easy to remove just a 10mm bolt.
Pic of the sensor details
Pic of the sensor and where to clean
You need to liberally spray directly into the sensor cone and along the metal wire, then spray again into the cone with the cone facing down, so the fluid drains and flushes any debris out. After this concentrate on the yellow/orange bulge at the bottom, once satisfied that it is clean leave to dry, again I used a hair dryer on low setting to just ensure that all areas were dry.
When refitting the sensor ideally you should replace the "O" ring, either way coat it with some new engine oil before refitting.
IMRC VALVE
Pic of the IMRC Valve minus the MAP Sensor
The valve wasn't as bad as I thought it would be.
My personal advice is to ensure that the MAP sensor is removed before cleaning.
The valve is relatively simple to remove, however I was using a 12mm socket which I could do all but the top nut with, I ended up getting a 12mm ratchet ring key from Halfords, this would also make the bolt at the bottom of the valve, connecting to the support bracket a lot easier to remove.
Pic of the Valve removed
Personally I used brake cleaner sprayed on a rag to clean the oily sooty residue from the bottom chamber, and cleaned around the butterfly valve, (I took CJ's advice here on not removing the butterfly) I also cleaned inside the inlet manifold as far as I could reach.
On refitting make sure all metal faces are cleaned with brake cleaner on a clean rag.
After putting everything back together I took out the ECU Fuse for a couple of minutes and then replaced and started the car, with all ancillary s switched off, didn't touch anything and left for the ECU to learn for 10 minutes, then switch the engine off and then turned the ignition back to position II.
Since replacing the IMRC solenoid, which solved the major hesitation issues, however there has been 2 tiny judders as it is about 5mm into the temp zone and then all is fine.
Drove the car today and all seems well and so far no judders at all, early days and it maybe due to the ECU reset. :lol:
MAF SENSOR
The MAF Sensor is located here
Personally I removed the air-box, but you do not need to, to remove the MAF Sensor. However you will need to get/use a 5 pointed security torx with a hole in the middle, to undo the screws. I got mine from Ebay.
Once removed you need to use MAF cleaner, it is important to use MAF cleaner and not something like brake cleaner, as this could do damage to the plastics and possibly the sensor!.
Pic of the rear of the MAF Sensor
Firstly you need to clean the IAT sensor indicated by the arrow, spray the cleaning fluid on liberally, being careful not to hit the wire with the straw on the MAF Cleaner, ensure whole wire is cleaned.
Next in the middle of the sensor you will see a metal plate, again spray this liberally
Finally you need to clean the hot-wire (I think) which is visible at the end of the sensor,again spray liberally, be careful however, don't stick the straw from the spray in the recess. Apologies for the picture all you can see is the edge of some metal, however you should see a thin wire in-between, when looking at your sensor.
Now the most important thing, don't refit yet, leave to dry, I left mine to dry for a while and then used a hair dryer on a low temp setting to ensure the sensors were dry.
I also personally cleaned inside the air-box where the MAF Sensor goes.
MAP SENSOR (Including second IAT sensor)
The MAP Sensor is located here on top of the IMRC Valve.
It is fairly easy to remove just a 10mm bolt.
Pic of the sensor details
Pic of the sensor and where to clean
You need to liberally spray directly into the sensor cone and along the metal wire, then spray again into the cone with the cone facing down, so the fluid drains and flushes any debris out. After this concentrate on the yellow/orange bulge at the bottom, once satisfied that it is clean leave to dry, again I used a hair dryer on low setting to just ensure that all areas were dry.
When refitting the sensor ideally you should replace the "O" ring, either way coat it with some new engine oil before refitting.
IMRC VALVE
Pic of the IMRC Valve minus the MAP Sensor
The valve wasn't as bad as I thought it would be.
My personal advice is to ensure that the MAP sensor is removed before cleaning.
The valve is relatively simple to remove, however I was using a 12mm socket which I could do all but the top nut with, I ended up getting a 12mm ratchet ring key from Halfords, this would also make the bolt at the bottom of the valve, connecting to the support bracket a lot easier to remove.
Pic of the Valve removed
Personally I used brake cleaner sprayed on a rag to clean the oily sooty residue from the bottom chamber, and cleaned around the butterfly valve, (I took CJ's advice here on not removing the butterfly) I also cleaned inside the inlet manifold as far as I could reach.
On refitting make sure all metal faces are cleaned with brake cleaner on a clean rag.
After putting everything back together I took out the ECU Fuse for a couple of minutes and then replaced and started the car, with all ancillary s switched off, didn't touch anything and left for the ECU to learn for 10 minutes, then switch the engine off and then turned the ignition back to position II.
Since replacing the IMRC solenoid, which solved the major hesitation issues, however there has been 2 tiny judders as it is about 5mm into the temp zone and then all is fine.
Drove the car today and all seems well and so far no judders at all, early days and it maybe due to the ECU reset. :lol: