I did the engine swap a couple of years ago.  Sold it to a fellow at work.  He had the knock sensor P0325 & misfire on #3 P0303 pretty random for over a year.

 

I suggested the normal:

NGK Copper Plugs

NGK Spark Plug Wires

Gave him a knock sensor to put on

gave him a set of fuel injectors to swap in

 

He wanted to sell the car, so I got it back. 

He had not followed my advice on the NGK plugs and wires so I installed a set and drove the car for a couple of weeks.

I sold it to another family friend the they drove it for over a month before the P0325 & P0303 codes came back.

 

There is a slight miss, but over all runs well.  About 210K mileage, 5sp.

 

I have not adjusted the valves or taken a compression test. 

Other things?

Thanks, Larry

 

Might be some carbon built up on a valve, could do seafoam cleaning.

i'm usually suspicious of ''cure-alls''

but seafoam??????

Yes seafoam down the intake could knock carbon of off a valve and cure a missfire. I've done it before, could use water as well.

Sounds like they checked everything else out.

I had the same thing happen with my 99 when I swapped. There was a small crack in the knock sensor. But you said you replaced it so my next thought could be what happened on my 91 when I swaped engines. The single blade that is in one side of the connector for the knock sensor got pushed out the back a little so it never seated in the other connector.  Just a thought

New knock sensor on order.  I swapped in a used one, that ohm out correctly.

New one going in and a seafoam treatment.

Hi,

Depending on your 2.2 - HLA  vs SLA - I'd check the valve clearance if SLA.....easy(er) to do on the SOHC.

 

If you've got the Leak down tester, I'd do that and a Comp. test as a 'health check'.

 

GL

TD