SPONSORED LINKS

Truck starts but shuts off thirty seconds later

Tiny
PLOWBOYXI
  • MEMBER
  • 1991 CHEVROLET TRUCK
I have a 1991 Chevrolet Silverado c1500, 130,000 miles. The engine has been changed from the original 4.3L to a 010 block 350, and a carburetor and HEI ignition has been installed. The in-tank fuel pump is still in, (with a regulator). After the carburetor was put on, the truck ran very well for about a month, but recently it has come up with a problem. The fuel pump cycles on when the key is turned on, the engine will start and run fine, but after about 30 seconds the truck will shut off. Looking at the wiring schematic, the Oil Pressure Sensor works fine, and the Fuel Pressure Relay is new. Is it the pump? Or am I right and if it works it works? I'm at the end of my rope and this has stumped quite a few people so far. Help!
SPONSORED LINKS
Wednesday, March 21st, 2007 AT 2:47 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening.

When it shuts off, do you still hear the fuel pump run?

To be honest, I would install the mechanical fuel pump on the block.

That would mean to remove the fuel tank and the pump. Remove the electric pump from the sender and install a hose in place so you have a regular pick up.

It does sound like the fuel pump is the issue. Does the carburetor have any fuel in the bowl when it shuts off?

Roy
Image (Click to make bigger)
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Tuesday, March 24th, 2020 AT 5:17 PM

Please login or register to post a reply.

Related Engine Stall While Driving Content

Code Read Retrieval/Clear Chevrolet
VIDEO
Code Read Retrieval/Clear Chevrolet
Instructional repair video
Engine Stalls While Driving
GUIDE
Engine Stalls While Driving
An engine that stalls while driving and then starts back up again, either immediately or after a short time is different from an engine that just wont start or if the...
VIEW MORE

Sponsored links