2L diesel running problems
#1
12-02-2022, 12:28 PM
2L diesel running problems
I have three different engine running problems which I'm sure are related but am not sure how or what's the cause. The car has 144k on the clock and had new injectors at 138k. There are no codes. I used to run with the egr blanked off but removed the plate when the guy at the fuel injection Co thought that was the cause of problem 1. It seemed to cure it but with the colder weather the problem is back.
Problem 1. At approx 1500rpm on a light throttle, usually in 3rd gear on a slight incline the engine misfires quite severely. Pressing the throttle more stops it.
Problem 2. Occasionally on a hot start the engine either runs on less than 4 cylinders or possibly backwards (if that's possible?).
Problem 3. When starting from cold the engine starts with quite a bang, if it were a petrolengine I'd suspect the ignition timing was too far advanced. After starting though it runs OK.
Problem 1. At approx 1500rpm on a light throttle, usually in 3rd gear on a slight incline the engine misfires quite severely. Pressing the throttle more stops it.
Problem 2. Occasionally on a hot start the engine either runs on less than 4 cylinders or possibly backwards (if that's possible?).
Problem 3. When starting from cold the engine starts with quite a bang, if it were a petrolengine I'd suspect the ignition timing was too far advanced. After starting though it runs OK.
#2
12-05-2022, 03:51 AM
@MCW739 I had all sorts of weird behaviour from my 2.2D when the EGR was failing.
Not impossible that you have multiple issues (although Occam's Razor suggests one more likely) - have you tried disconnecting the EGR plug to see if that at least changes the symptoms (will throw an error eventually, but good for a short term test). My failing EGR didn't give any error messages, but caused all sorts of issues.
Not impossible that you have multiple issues (although Occam's Razor suggests one more likely) - have you tried disconnecting the EGR plug to see if that at least changes the symptoms (will throw an error eventually, but good for a short term test). My failing EGR didn't give any error messages, but caused all sorts of issues.
#3
12-05-2022, 04:31 AM
@MCW739 I had all sorts of weird behaviour from my 2.2D when the EGR was failing.
Not impossible that you have multiple issues (although Occam's Razor suggests one more likely) - have you tried disconnecting the EGR plug to see if that at least changes the symptoms (will throw an error eventually, but good for a short term test). My failing EGR didn't give any error messages, but caused all sorts of issues.
Not impossible that you have multiple issues (although Occam's Razor suggests one more likely) - have you tried disconnecting the EGR plug to see if that at least changes the symptoms (will throw an error eventually, but good for a short term test). My failing EGR didn't give any error messages, but caused all sorts of issues.
I can't find any post by 'Occam's Razor', can you let me have a link?
Last edited by MCW739; 12-05-2022 at 07:46 AM. Reason: Disconnected egr
#4
12-05-2022, 06:12 AM
Occam's razor is just a principal that broadly states that the explanation requiring the fewest assumptions is usually the correct one. (If you hear hoof beats think horse, not zebra.)
In this case it is generally my assumption that a particular issue on a car is more likely to be caused by one fault, and not multiple faults. Possibly a bad assumption with an old car
In this case it is generally my assumption that a particular issue on a car is more likely to be caused by one fault, and not multiple faults. Possibly a bad assumption with an old car
#5
12-05-2022, 06:21 AM
Here's one link (of many) to introduce you to the man.
https://www.britannica.com/topic/Occ...20posit%20more.
William's approach to complex problems is remarkably valuable in many diagnostic situations that he could never have imagined!
https://www.britannica.com/topic/Occ...20posit%20more.
William's approach to complex problems is remarkably valuable in many diagnostic situations that he could never have imagined!
#6
12-05-2022, 07:49 AM
Occam's razor is just a principal that broadly states that the explanation requiring the fewest assumptions is usually the correct one. (If you hear hoof beats think horse, not zebra.)
In this case it is generally my assumption that a particular issue on a car is more likely to be caused by one fault, and not multiple faults. Possibly a bad assumption with an old car
In this case it is generally my assumption that a particular issue on a car is more likely to be caused by one fault, and not multiple faults. Possibly a bad assumption with an old car
Here's one link (of many) to introduce you to the man.
https://www.britannica.com/topic/Occ...20posit%20more.
William's approach to complex problems is remarkably valuable in many diagnostic situations that he could never have imagined!
https://www.britannica.com/topic/Occ...20posit%20more.
William's approach to complex problems is remarkably valuable in many diagnostic situations that he could never have imagined!
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