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Gary
Gary, ASE Certified Technician
Category: Subaru
Satisfied Customers: 739
Experience:  Senior Technician
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1995 Subaru Legacy lsi P0302 code misfire number 2 cylinder

Customer Question

1995 Subaru Legacy lsi P0302 code misfire number 2 cylinder replaced all plugs and wires. Runs well for 1 day the throws same code
Submitted: 4 months ago.
Category: Subaru
Expert:  Gary replied 4 months ago.

Hi there,

Does the engine run as smooth as it normally would?

I would perform a compression test.

It could be an intermittent injector.

Gary

Customer: replied 4 months ago.
Engine runs smooth did a compression test today all 4 cylinders 155 + to
Customer: replied 4 months ago.
I will run ok for an hour same code appears
Expert:  Gary replied 4 months ago.

Compression test may be ok, I would perform a leak down test as well.

Is cylinder 2 lower than the rest?

I've had one engine of 170 on 1-3, 160 on 4, which logged P0304.

It had 25% leakage at TDC, out the tailpipe.

Had a collet jump out of the valve retainer.

If yours only occurs once up to operating temp, I've had one that had a loose valve guide in one head.

I would swap injector 2 with 4, and reaccess.

If it becomes P0304, then have all injectors ultrasonically cleaned.

Gary

Expert:  Gary replied 4 months ago.

Hi again,

Have you had any success with your car?

I hope my advice has been of assistance to you.

Kind regards

Gary

Customer: replied 4 months ago.
I'm swapping out the coil on Tuesday with a replacement unit. REVIEW All four cylinders are almost identical compression 155-160 psi engine runs smooth at idle and does not stumble or misfire when driving .... Eventually it will throw P0302 number 2 misfire. I will contact you later in the week after I change the coil and then swap the injector. I do not have a leak down testerJim
Expert:  Gary replied 4 months ago.

Hi Jim,

That's good info, sounds like you may locate it this time.

Gary

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