Misfire cylinder one

2006 KIA PICANTO
65,000 MILES • 1.1L • 4 CYL • 2WD • MANUAL
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BRIAN AINSLEY
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Changed spark plug leads and plugs, coil pack, crankshaft target position sensor ring, crankshaft position sensor. Car still misfire on cylinder one. After faults cleared timing belt rechecked timing.
Cheers any help is much appreciated.
Aug 14, 2018 at 12:09 PM
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MHPAUTOS
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May be a misfiring injector, if all electrical concerns are okay, check injector pulse with a noid light, this will show that the electrical impulse is there to fire the injector if that is okay, remove the injectors and have them ultrasonically cleaned and flow tested. If the fuel system is very dirty, particles can bypass a clogged filter and lodge in an injector causing problems. But first double check all what has been done first to make sure you have not created a problem unknowingly. Also, best do a compression test to prove cylinder pressures are okay.

I have added a few links to assist you.

https://www.2carpros.com/articles/how-to-test-engine-compression
https://www.2carpros.com/articles/how-to-test-a-fuel-injector
Aug 15, 2018 at 12:04 AM