01 LX, Cyl 4 Misfire, Low Compression
09-19-2012, 10:45 PM
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01 LX, Cyl 4 Misfire, Low Compression
so had a check engine light, check and came back as cyl #4 misfire. did a compression test and here are the numbers:
#1: 195
#2: 190
#3: 160
#4: 100
plus last oil change was in nov 2011. since then, i've added about 10 qts of oil, and there are no oil stains on my driveway or wherever i park.
what do you guys think is bad... valve? piston rings? both? or other?
#1: 195
#2: 190
#3: 160
#4: 100
plus last oil change was in nov 2011. since then, i've added about 10 qts of oil, and there are no oil stains on my driveway or wherever i park.
what do you guys think is bad... valve? piston rings? both? or other?
09-19-2012, 11:05 PM
#2
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well I had this problem in my 00 accord except mind was 60 in 4th cylinder. Everyone I talked to said replace engine, I even had a dealership guy that my neighbor knew say replace it.
replacing it would be the cheapest depending if it is burnt rings or damaged piston
you might want to wait for other input then mind just thought I'd let you know
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replacing it would be the cheapest depending if it is burnt rings or damaged piston
you might want to wait for other input then mind just thought I'd let you know
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09-20-2012, 08:33 AM
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Re: 01 LX, Cyl 4 Misfire, Low Compression
I just replace the timing belt Nov 2011. I'm sure I put the belt on correctly...checked timing and it's correct, car runs fine too. Could it possibly be a timing issue?
09-20-2012, 08:41 AM
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Re: 01 LX, Cyl 4 Misfire, Low Compression
I would change the oil asap with a very good oil, change it again in 1000 miles and then see what the oil consumption is like after that. When an engine starts to burn oil and you only add oil all the nasty stuff stays in the engine.
09-20-2012, 09:49 AM
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Re: 01 LX, Cyl 4 Misfire, Low Compression
09-20-2012, 09:58 AM
#6
Re: 01 LX, Cyl 4 Misfire, Low Compression
Just hang on a minute.
It is not a timing issue.
There is an easy way to narrow down exactly what is causing the loss of compression.
Take a few tablespoons of motor oil and pour it into the cylinder with a low reading.
Then, with the ignition bypassed, the battery fully charged, and the throttle body held wide open, perform the test on the cylinder again.
The oil will act as a sealant, either raising your compression numbers, or it wont do squat.
Since there's gravity to account for, a rise in compression indicates your rings on that piston are leaking.
If that's the case a rebuilt replacement may be a good option.
If nothing changes with your numbers, either your head gasket or valve seats need attention.
Both of those issues are easily addressed in a weekend with the motor staying in the car.
Good luck.
It is not a timing issue.
There is an easy way to narrow down exactly what is causing the loss of compression.
Take a few tablespoons of motor oil and pour it into the cylinder with a low reading.
Then, with the ignition bypassed, the battery fully charged, and the throttle body held wide open, perform the test on the cylinder again.
The oil will act as a sealant, either raising your compression numbers, or it wont do squat.
Since there's gravity to account for, a rise in compression indicates your rings on that piston are leaking.
If that's the case a rebuilt replacement may be a good option.
If nothing changes with your numbers, either your head gasket or valve seats need attention.
Both of those issues are easily addressed in a weekend with the motor staying in the car.
Good luck.
09-20-2012, 10:39 AM
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Re: 01 LX, Cyl 4 Misfire, Low Compression
Forgot to mention might be a valves that are to tight and need adjustment, that would cause the misfire and low compression. The best thing is to perform a cylinder leakage test, that would tell you where you are loosing the compression.
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09-22-2012, 08:34 AM
#10
Re: 01 LX, Cyl 4 Misfire, Low Compression
Just hang on a minute.
It is not a timing issue.
There is an easy way to narrow down exactly what is causing the loss of compression.
Take a few tablespoons of motor oil and pour it into the cylinder with a low reading.
Then, with the ignition bypassed, the battery fully charged, and the throttle body held wide open, perform the test on the cylinder again.
The oil will act as a sealant, either raising your compression numbers, or it wont do squat.
Since there's gravity to account for, a rise in compression indicates your rings on that piston are leaking.
If that's the case a rebuilt replacement may be a good option.
If nothing changes with your numbers, either your head gasket or valve seats need attention.
Both of those issues are easily addressed in a weekend with the motor staying in the car.
Good luck.
It is not a timing issue.
There is an easy way to narrow down exactly what is causing the loss of compression.
Take a few tablespoons of motor oil and pour it into the cylinder with a low reading.
Then, with the ignition bypassed, the battery fully charged, and the throttle body held wide open, perform the test on the cylinder again.
The oil will act as a sealant, either raising your compression numbers, or it wont do squat.
Since there's gravity to account for, a rise in compression indicates your rings on that piston are leaking.
If that's the case a rebuilt replacement may be a good option.
If nothing changes with your numbers, either your head gasket or valve seats need attention.
Both of those issues are easily addressed in a weekend with the motor staying in the car.
Good luck.
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