[KT8797]

2003 4.3 vortec
Misfire issues
Not bad at idle worse around 1000-1200rpm then smooths out some from there up.
I just want to know where to start with fixing it.

 

[Rhotpursuit]

What have you done so far?

 

[oldeerslayer]

Start by scanning it to see which cylinders are misfiring.

 

[KT8797]

What have you done so far?

Not much. Doing plugs and wires and distributor tomorrow

 

[KT8797]

Start by scanning it to see which cylinders are misfiring.

2 and 4

 

[Rhotpursuit]

Plugs & wires should be oem....or you'll be sorry....

 

[KT8797]

Oh yeah. I went oem

 

[Collins]

Plugs & wires should be oem....or you'll be sorry....

Was wondering why own?? Just changed mine on 97 S10 4.3 and haven't had a problem yet..do you think I will? And should I change to own?

 

[Rhotpursuit]

The General spent a lot of money making the ignition system reliable...why mess with success... A lot of aftermarket components, especially plugs, caps, and rotors don't do well. Use what you have un til they fail..then go OEM.

 

[Collins]

Was wondering why own?? Just changed mine on 97 S10 4.3 and haven't had a problem yet..do you think I will? And should I change to own?

OEM...

The General spent a lot of money making the ignition system reliable...why mess with success... A lot of aftermarket components, especially plugs, caps, and rotors don't do well. Use what you have un til they fail..then go OEM.

Thank you...that makes sense..

 

[KT8797]

Was wondering why own?? Just changed mine on 97 S10 4.3 and haven't had a problem yet..do you think I will? And should I change to own?

I always go oem when possible. Just seem to be better quality and last longer

 

[KT8797]

2003 4.3 vortec
Misfire issues
Not bad at idle worse around 1000-1200rpm then smooths out some from there up.
I just want to know where to start with fixing it.

For those wondering. Mine ended up being the whole distributor. I did a new distributor with OEM cap and rotor. Went back with new OEM plugs and new wires as well