2003 Chevrolet S 10 Morning You Lightly Touch Gas Motor Seems Miss Away Heaver

2003 CHEVROLET S-10

145,000 MILES

FLEAGLE0202

MEMBER
12 POSTS

in the morning when you lightly touch the gas the motor seems to have a miss but goes away with heaver acceleration. I don't know if the 0420 code has anything to do with it. I replaced all 3 of the 02 sensor and added a adapter to the 02 after the cat since I had to hollow out the cat. The check engine light comes back on every several thousand miles.

Dec 8, 2012 at 5:16 PM

HMAC300

✓Experienced Mechanic
48,601 POSTS

scan for codes and check fuel pressure first

Dec 9, 2012 at 8:24 AM

FLEAGLE0202

MEMBER
12 POSTS

If you could explain more detail where your going with your answer that would help.
Your answer is not helpful to me at all I would wish someone that fully understands the question should or would answer.

Dec 9, 2012 at 9:20 AM

HMAC300

✓Experienced Mechanic
48,601 POSTS

the 420 codes means it 's a catalytic converter problem andyou should check yoru fuel pressure because it can cause all kinds of problems similar toyours. Has this truce ever had spark plugs cheanged and ignition system checked as spark plugs can do that as well. auto part store rent gauges.

Dec 9, 2012 at 10:35 AM

FLEAGLE0202