Miss fire in cylinder 1

P.gx353

New Member
Hey i have slight miss fire in cylinder 1 which giving me engine light. Tried swapping spark plugs and the coil pack didn’t solve the issue.
tried to compression test the cylinders and cylinder 1 was at 130PSI where all the rest were 150 PSI anyone came across this issue before?

car is lancer ES CJ 2008
 
How are the injectors? Take them out and give them a wipe with a rag and petrol, or alternatively get them cleaned (or run a bottle of injector cleaner with half a tank of fuel.

Compression of cylinders within around 10% of each other is normal, i wouldnt worry about that too much. How many kms on the engine?
 
Did you do a wet test to follow? Have you done a leakdown test?

do you have any other codes?

injector cleaner wont hurt, same with a manifold decarbon.
 
How are the injectors? Take them out and give them a wipe with a rag and petrol, or alternatively get them cleaned (or run a bottle of injector cleaner with half a tank of fuel.

Compression of cylinders within around 10% of each other is normal, i wouldnt worry about that too much. How many kms on the engine?
125000 kms and I’m guessing it could be a vacuum leak as when the car is idling and i push on the brakes the car start rough ideling
 
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