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1979 Chevy Truck Engine dies

Tiny
ROD13
  • MEMBER
  • 1979 CHEVROLET TRUCK
Engine Performance problem
1979 Chevy Truck V8 Two Wheel Drive Automatic unkown miles

i have a 79 scottsdale, with a 350 5.7 gas, 4bl carb. I just put the new carb on it, and set it right, or so I think, it also has a new fuel pump, spark plugs, battery, and wires. It seems to start fine, and run fine when I drive. But when I go at low speeds or sometimes when I idle, and slow down. It wants to just sink and die down, sometimes itll save itself, sometimes it wont.
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Thursday, June 3rd, 2010 AT 6:06 PM

6 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check and test the EGR and PCV valves
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Friday, June 4th, 2010 AT 9:19 AM
Tiny
ROD13
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  • 4 POSTS
I checked and replaced them both, that didnt do it. Any other suggestions?
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Saturday, June 5th, 2010 AT 6:15 PM
Tiny
RASMATAZ
  • MECHANIC
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If it has a heat riser check if its opening, also check if the choke plate is fully opening when engine at normal temp. Also try adjusting the idle speed
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Saturday, June 5th, 2010 AT 9:02 PM
Tiny
ROD13
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There is no heat riser, and the choke plate is operating fine.
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Monday, June 7th, 2010 AT 8:21 PM
Tiny
RASMATAZ
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Check the fuel pressure if its within specs and also for a kinked fuel line, clogged fuel filter and fuel lines back to the tank-also test the PCV valve

Double check the adjustment of the A/F mixture and Curb idle speed
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Monday, June 7th, 2010 AT 9:38 PM
Tiny
ROD13
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  • 4 POSTS
Fuel lines are all good, pcv valve is fine. Adjustments are good too.
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Friday, June 11th, 2010 AT 5:50 PM

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