Joined: Mar 2018

Posts: 11

Likes: 0

Hows it going guys I’m new to the Ls world but I jus recently put a stock 5.3 with 6.0 heads ported in my 79 Malibu and I am gettin backfire and initial stumble when you give it full throttle, other than that it runs decent.

Eveythings stock besides edelbrock intake and msd 60143 box, I put it on computer (msd view) and changed map/timing a tad, by going off a YouTube video and it seemed to help a bit but other than that I’m lost.... should I put 5.3 heads back on or go with bigger cam..?

Thanks for any help/suggestions

Joined: Jan 2018

Posts: 1,251

Likes: 239

From: Dade City, Fl.

Joined: Mar 2018

Posts: 11

Likes: 0

Do you mean the fuel/air mix screws on the front of carb, changing jets, or puttin a 50 cc accelerator pump in it ( I heard of someone doing so on another thread) other than that its a brand new edelbrock carb 1806 650 cfm, I haven’t done nothin to it besides bolt it on...

thanks for the reply.

Joined: Jan 2018

Posts: 1,251

Likes: 239

From: Dade City, Fl.

Joined: Mar 2018

Posts: 11

Likes: 0

cant seem to find any vacuum leaks, but thanks I’ll look at that accelerator pump rod today and see if I can figure something out... I’ll hop back on later

Thanks again , appreciate your time n suggestions

<Motor seems choked out at full throttle, but I can gradually power brake it and turn tires like nothin>

Joined: Mar 2018

Posts: 11

Likes: 0

You Tube