Engine misfires when warm

CONORE

MEMBER
2006 FORD KA
1.3L
4 CYL
2WD
MANUAL
91,000 MILES

Hello, my car is misfiring when warm on cylinder two. I can drive for about ten to twenty minutes and it'll be fine. Once it's misfired, if I restart the car it will run properly for about one minute and then start to misfire again.

I have changed the spark plugs, spark plug leads and coil pack and nothing has changed and I also cleaned out the air filter. There appears to be some sort of grease when I take out the spark plugs after a couple of days so I think the engine may be running rich but this could be caused due to the misfiring.

Any idea of what to do/look for?

Thanks in advance.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
42,961 POSTS

Hello,

It sounds like you have the wrong weight oil in the engine causing the lifters to pump up or an injector that is starting to go bad. To confirm lets run the codes to see what is going on.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing
Please run down this guide and report back.

Fluid Types

Engine Oil

U.S.A. .................... Motorcraft SAE 5W-20 Premium Synthetic Blend Motor Oil

Canada .................... Motorcraft SAE 5W-20 Super Premium Motor Oil

Ford P/N .................... XO-5W20-QSP (U.S.A)

Ford P/N .................... CXO-5W20-LSP12 (Canada)

Ford Specification .................... WSS-M2C930-A with API Certification Mark

NOTE: Use of synthetic or synthetic blend motor oil is not mandatory. Engine oil need only meet the requirements of Ford specification WSS-M2C930-A and the API Certification mark.

Capacities

Engine Oil

With Filter .................... 4.25L (4.5 Qt)

Please let me know