Urgent Advice Needed
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Urgent Advice Needed
A friend of mine has an EVO 5, it was 4 yrs old when he bought it, there have been a few problems which I will list in order they appeared and any advice would be greatly appreciated.
1. Vehicle was MOT'd at another garage (within 4 weeks of buying it) it failed the emissions test with a CO reading of 3.38%, the vehicle was still fitted with a catalyst at this point and I suspect this is exceptionally high for a cat equipped car.
2. The Vehicle was then taken back to the dealers (not a mitsubishi dealer I might add) who almost choked on his coffee and asked why was it taken elsewhere, the dealer offered to sort the car out and took it in.
3. The car was returned without an MOT printout and my friend didnt ask them what they had done to fix the car.
4. The car was again returned for a top end rattle (pinking?) and various components were replaced.
5. A perfomance filter was then fitted to the car (not by the dealer) and also an exhaust.
6. within 3-4 weeks the engine blew up, the car was taken back to the dealers while they investigated the cause.
7. I then got involved and started asking questions (I am a time served auto electrician with experience in engine management calibration at Rover) when I asked what the original fault was the dealer got very uptight and eventually admitted that the Lambda sensor had been faulty and was replaced, this is what was causing the high CO reading, when I asked if this could have caused the car to overfuel I was told "you dont know what your talking about" and the dealer became very defensive.
8. We now have an engineers report that states there is evidence of overfueling although the dealer maintains that it was the air filter/exhaust combination that caused the vehicle to "overboost"? and blew it up.
Heres my take on it, as I understand it the engine has a mass airflow sensor, this measures the amount of air going into the engine so even with a high flow filter the ECU knows how much is going in and what the RPM/Load is on the engine, if the lambda sensor had been faulty for a while and was causing the ECU to overfuel the car (CO was 3.38%) would this be enough to cause catastrophic engine failure?
Morpheus
1. Vehicle was MOT'd at another garage (within 4 weeks of buying it) it failed the emissions test with a CO reading of 3.38%, the vehicle was still fitted with a catalyst at this point and I suspect this is exceptionally high for a cat equipped car.
2. The Vehicle was then taken back to the dealers (not a mitsubishi dealer I might add) who almost choked on his coffee and asked why was it taken elsewhere, the dealer offered to sort the car out and took it in.
3. The car was returned without an MOT printout and my friend didnt ask them what they had done to fix the car.
4. The car was again returned for a top end rattle (pinking?) and various components were replaced.
5. A perfomance filter was then fitted to the car (not by the dealer) and also an exhaust.
6. within 3-4 weeks the engine blew up, the car was taken back to the dealers while they investigated the cause.
7. I then got involved and started asking questions (I am a time served auto electrician with experience in engine management calibration at Rover) when I asked what the original fault was the dealer got very uptight and eventually admitted that the Lambda sensor had been faulty and was replaced, this is what was causing the high CO reading, when I asked if this could have caused the car to overfuel I was told "you dont know what your talking about" and the dealer became very defensive.
8. We now have an engineers report that states there is evidence of overfueling although the dealer maintains that it was the air filter/exhaust combination that caused the vehicle to "overboost"? and blew it up.
Heres my take on it, as I understand it the engine has a mass airflow sensor, this measures the amount of air going into the engine so even with a high flow filter the ECU knows how much is going in and what the RPM/Load is on the engine, if the lambda sensor had been faulty for a while and was causing the ECU to overfuel the car (CO was 3.38%) would this be enough to cause catastrophic engine failure?
Morpheus