350 - Cranking, won't fire

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.

kenn

Full Access Member
Joined
Jan 17, 2019
Posts
141
Reaction score
46
Location
detroit
First Name
ken
Truck Year
1977, 1978
Truck Model
c10, k10
Engine Size
350
electric fuel pump ? takes a bit for gas line to fill up if its not, squirt little gas in carb see if she will fire (watch out for backfires thru carb if 180 out)
 

theblindchicken

Full Access Member
Joined
Oct 24, 2013
Posts
1,518
Reaction score
265
Location
SoCal
First Name
Christian
Truck Year
1974
Truck Model
K10 5" lift + 2" BL
Engine Size
350-4, 0.030" over
Working on the truck today.

Got the distributor all set up again. Appeared to be 180 out, but now having another issue.

Truck will fire up easily, but then the throttle will run away right up to 2k rpms, hold for a couple seconds then tank to 600-800 then die. All without actually applying the throttle.

Currently have vacuum lines hooked up. I can hold 2k with a little tap of the throttle here and there as well.
 

theblindchicken

Full Access Member
Joined
Oct 24, 2013
Posts
1,518
Reaction score
265
Location
SoCal
First Name
Christian
Truck Year
1974
Truck Model
K10 5" lift + 2" BL
Engine Size
350-4, 0.030" over
Also smoking through carb as well.
You must be registered for see images attach
 

Snoots

Full Access Member
Joined
Jan 23, 2013
Posts
8,158
Reaction score
15,957
Location
Georgia
First Name
Roger
Truck Year
1973
Truck Model
Jimmy Sierra
Engine Size
350
Intake leak?

Can't really tell but, do you have a pholenic spacer between the intake and carb?
If not, you REALLY need one or you'll have more hot soak issues than you can shake a stick at.
 

theblindchicken

Full Access Member
Joined
Oct 24, 2013
Posts
1,518
Reaction score
265
Location
SoCal
First Name
Christian
Truck Year
1974
Truck Model
K10 5" lift + 2" BL
Engine Size
350-4, 0.030" over
Intake leak?

Can't really tell but, do you have a pholenic spacer between the intake and carb?
If not, you REALLY need one or you'll have more hot soak issues than you can shake a stick at.
I have one of the 3/16-1/4" carb gaskets. I would need to get a new fuel line if I get a thicker spacer than that between the carb and intake manifold.

I'm not sure what you mean by an intake leak.

Appreciate the quick help though.
 

Snoots

Full Access Member
Joined
Jan 23, 2013
Posts
8,158
Reaction score
15,957
Location
Georgia
First Name
Roger
Truck Year
1973
Truck Model
Jimmy Sierra
Engine Size
350
If it starts at first (usually there be a lot of gas there) it'll run then, start to lean out and rev like mad and die.
To me, that's the symptom of an air leak under the carb or the intake manifold to block.
Could be a massive leak in the throttle body too.

I should elaborate.

The throttle body develops leaks where the butterfly shaft goes thru the throttle plate. You can check for this by squirting a touch of starting fluid at that point with the engine running (if you can get it to run long enough).
 
Last edited:

Latest posts

Forum statistics

Threads
41,852
Posts
903,534
Members
33,365
Latest member
rossivey
Top