Advice on what could be wrong. (Distributor)

Khorg97 · May 11, 2026

2002 4.3 vortec.
I went to change the cap,rotor,plugs,and wires for an mis fire on cylinder 3 and general tune up.
When I went to replace my cap and rotor I learned the top of my distributor had rusted out pretty severely. So I ended up replacing everything.

I set #1 cylinder to TDC. Lined my rotor up to the 6 mark on the distributor;
put everything back together and now I’m having a no start issue. I had one back fire. Am I missing something? Thanks in advance!

mikez71 · May 11, 2026

Wow 2002 still has a dizzy!?

Only guess is you were on the wrong stroke TDC.. Remove, do 1 full crank rotation and re-install?

OR VietVet · May 12, 2026

Welcome to the forum, from Oregon.

The rotor tab should point at #1, not #6. You can turn the distributor toward #1 and see if fires.

afpj · May 12, 2026

What vehicle are we talking about? Blazer?

Joseph Garcia · May 12, 2026

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please. If we can't see it, it does not exist.

You are already receiving sage advice from the knowledgeable folks on this Forum.

RST Dana · May 12, 2026

If your crank is indicating TDC, then the rotor needs to be on whichever piston is on compression stroke, 1 or 4. Wrong gets backfire every time! My bad, I just realized is was a 6!!!!

OR VietVet · May 12, 2026

Firing order is 1,6,5,4,3,2.

LsHart · May 12, 2026

U fixed it?

exp500 · May 14, 2026

Another Drive by.

Advice on what could be wrong. (Distributor)

Khorg97

TYF Newbie

mikez71

Full Access Member

OR VietVet

GMT800 2005 Tahoe Z71

afpj

Full Access Member

Joseph Garcia

Elite Member

RST Dana

Elite Member

OR VietVet

GMT800 2005 Tahoe Z71

LsHart

Senior Member

exp500

Full Access Member

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