Just bought an '86 C20 Suburban

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

suburble

Full Access Member
Joined
Sep 23, 2013
Posts
203
Reaction score
8
Location
Arizona
First Name
Josh
Truck Year
1986
Truck Model
Suburban C20
Engine Size
454
The E carbs were mostley a california deal, the ESC was on all of them from 82 to 86, but even then on select models. A vehicle meant to have an E carb, wont have vac advance, but just a 4 wire pigtail for the ECM controlled timing. The ESc dizzys with the Vac advance were there to try to curb knock.

Well, it definitely has a vac advance on the distributor.

I'm guessing from the codes that it's the original carb. The PO said he had just put a new carb on it recently. I'm thinking he decided to keep the new one and threw the old one back on.

:greenchainsaw:

You must be registered for see images attach
 

HotRodPC

Administrator
Staff member
Admin
Joined
Aug 29, 2010
Posts
47,132
Reaction score
9,329
Location
OKC, OK
First Name
HotRod
Truck Year
85 K20 LWB
Truck Model
Silverado
Engine Size
454 - Turbo 400 - 3.73
The E carbs were mostley a california deal, the ESC was on all of them from 82 to 86, but even then on select models. A vehicle meant to have an E carb, wont have vac advance, but just a 4 wire pigtail for the ECM controlled timing. The ESc dizzys with the Vac advance were there to try to curb knock.

I think it was actually 81 that all of them had ESC. I know of 2 different 81's 1/2 tons I scrapped, both had ESC.
 

HotRodPC

Administrator
Staff member
Admin
Joined
Aug 29, 2010
Posts
47,132
Reaction score
9,329
Location
OKC, OK
First Name
HotRod
Truck Year
85 K20 LWB
Truck Model
Silverado
Engine Size
454 - Turbo 400 - 3.73
Well, it definitely has a vac advance on the distributor.

I'm guessing from the codes that it's the original carb. The PO said he had just put a new carb on it recently. I'm thinking he decided to keep the new one and threw the old one back on.

:greenchainsaw:

You must be registered for see images attach

That looks very similar to the 305/350 Carb I have on my 454. The high idle solenoid for the AC looks a bit different.
 

1ATony

Full Access Member
Joined
Jan 25, 2013
Posts
580
Reaction score
10
Location
NH
First Name
Tony
Truck Year
92
Truck Model
K1500
Engine Size
350
Welcome to the site,it's great to have you here.

Tony
 

Jims86

Full Access Member
Joined
Aug 3, 2010
Posts
5,492
Reaction score
135
Location
Patterson,Ca
First Name
Jim
Truck Year
1986
Truck Model
K10 Suburban Silverado
Engine Size
5.7 TBI
I think it was actually 81 that all of them had ESC. I know of 2 different 81's 1/2 tons I scrapped, both had ESC.

My stands corrected...dont see a lot of 81s.
 

Latest posts

Forum statistics

Threads
44,424
Posts
957,536
Members
36,776
Latest member
Love Samantha
Top