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Hi , all just an update i ordered some ac delco plugs and leads fitted them today and truck seems to start better and runs better , but p0302 now comes up all the time with this plug and lead setup when i took the tahoe for a drive the check light was comming on then going off unlike before when...

hummm i might just replace all of the o2 sensors and see what happens lol £200 i dont really want to spend lol

i have no cats had them removed , would an o2 sensor cause a misfire on one cylinder though ?

well today i can now hear the misfire by the exhaust you can tell when it skips a beat really starting to hate the tahoe now lol im lost now and not a clue what to do .

Hi all , im new and from england ive been having afew problems with my 2001 tahoe 5.3l , now where to start all of my problems started with the dreaded p0300 and both banks running lean . so after alot of reserch ive replaced the intake manifold gaskets with the green ones , all plugs and...