2000 Sierra 2500 6.0l engine - Random Misfires

Help,

I've been going around in circles on this one. The original scan gave me a code 161 and 300. so I changed the Oxygen sensor. Now I get code 300, so I changed the fuel filter, and the spark plugs. I still get code 300, Random misfire. When the truck is going uphill at about 110km, the check engine light flashes. When the truck isn't working hard, the check engine light goes off. The Truck now has 130,000 km. Any help to diagnose the problem as opposed to just changing parts would be appreciated

Reply to
DRIO
Loading thread data ...

You might be running rich. Hard to tell with all of that computer stuff. Is it idling ok?

Reply to
the_Host

Extremely -easy- to tell with all that computer stuff.

Reply to
aarcuda69062

Not unless the car is here with me and my computer. lol

H.

Reply to
the_Host

Problem sloved... I performed a CKP Learn Test and the issue went away...

Reply to
DRIO

Not to sound dumb but what is a CKP Learn Test? Thanks

Bob

Reply to
Bob M

formatting link
Whitelightning

Reply to
Whitelightning

Cool. Thanks.

Bob

Reply to
Bob M

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.