My truck is showing a p0300 code

Asked by Bigguy81 May 27, 2020 at 08:54 AM about the 1998 GMC Sonoma 2 Dr SL Standard Cab LB

Question type: Maintenance & Repair

Ok I'm having issues when it rains my truck throws
a p0300 code and has multiple misfires and I can't
figure it out and I did a tune up 2 years ago and it
was running great and I have changed the purge
valve and I replaced the EGR gasket and cleaned
the EGR! Any one know anything let me know

3 Answers

Bigguy81 answered 4 years ago

I have checked the for bare wire and didn't find anything and I'm leaning towards it being either the cam or vacuum hoses

Mark helpful

Bigguy81 answered 4 years ago

I have another question when drove my truck yesterday and it was raining and warm out my truck didn't act up at all but It still has a little bit of a misfire but when it's cold and rainy out it runs like crap and I am going to check my distributor cap and wires and my plugs to see if it is worn but my battery in my truck could be old and I'm going to replace that as well

Mark helpful

Bigguy81 answered 4 years ago

Well I ended up checking the distributor cap sure enough it had corrosion in the cap so replaced both cap, rotor and it runs great

Mark helpful

Your Answer:

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