Diagram "fuel system" 1984 Chevrolet G-30

See if the diagrams in the link help

https://www.gmsquarebody.com/threads/85-c10-vacuum-hose-diagram-pics.29486/

https://www.google.com/search?q=1984+Chevy+C10+vacuum+hose+diagram

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Have you looked over there?

YOU OPEN THAT HOOD AND ASK THE BLIND?
NO ENGINE TOLD AT ALL, AND IS A PURE ENGINE QUESTION.
I GUESS YOU MEANT HORSE POWER?> OR TORQUE AT THE FLYWHEEL>?
OLD TRUCK MAY HAVE HAD 3 ENGINE SWAP NOW.
THE VIN CODE SHOWS DAY 1 ENGINE CODE THERE
BUT PERSONALLY ID GET THE ENGINE SERIAL NUMBER FIRST OFF THE ENGINE AND GOOGLE IT.
BINGO WHAT ENGINES IS THERE.
K30 PICKUP? HAD 4 ENGINES DAY1 NEW USA CHOICES
GEN3 K30
ALL GEN3 HAD SOME OF THESE OR WAS SWAPPED OUT.
BACK THEN I'D DE-TUNED MANY ENGINES TO GET 16MPG NOT 8 OR WORSE.
WITH CARB CHANGES, DID MANY
Powertrain
Engine 250 cu in (4.1 L) I6
292 cu in (4.8 L) I6
262 cu in (4.3 L) V6
305 cu in (5.0 L) V8
350 cu in (5.7 L) V8 GUESS 2
366 cu in (6.0 L) V8
400 cu in (6.6 L) V8 GUESS 1
454 cu in (7.4 L) V8
350 cu in (5.7 L) Oldsmobile Diesel V8
379 cu in (6.2 L) Detroit Diesel V8


YOU NEED HEAD AND BLOCK CASTING NUMBER TO KNOW WHAT IS REALLY THERE IF THE 8TH VIN CODE IS WRONG UNDER HOOD
400>? SAYS USED EXTENSIVELY ON TRUCK THEN,.

Early models produced 265 hp (198 kW) with a two-barrel carburetor. All 400s came with a two-barrel carburetor until 1973. A four-barrel carburetor option became available in 1974.

The 400 was never intended as a high-performance engine and never saw large factory horsepower numbers; nevertheless, it developed a reputation for creating tremendous torque (up to 400 lb?ft (542 N?m) in 1970)

OLD CARS OR TRUCKS MAY HAVE HAVE MODS
STEEL HEADERS
BETTER CARBS (FOR MORE HP OR FOR MORE MPG)
HEAD SWAPS.

Question edited for clarity and spelling.

Quadrajet is the carburetor made by Rochester. Vacuum information is in the link. More on the mages tab.

https://www.google.com/search?q=rochester+quadrajet+carburetor+vacuum+diagram

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1: DOES THE STARTER CRANK FAST?
LIKE THIS. Y/N
https://freesound.org/people/drdeath666/sounds/687447/

YES IS THAT IS CALLED CRANKS GOOD BUT WILL NOT START
AND THAT HAS 50+ CAUSES.
no engine told , is car in USA or Mexico or Chile? where.
cars outside USA are very different. for sure engines. and EFI.
Gasoline:
1.95 L LR1 I4
2.0 L LQ2 I4
2.5 L L38/LN8 I4
2.8 L LR2/LL2 V6
4.3 L L35/LB4 V6
Diesel:
2.2 L LQ7 I4

which is it? we can not guess cars ,engines or countries.
so sorry ,can not.!

1984 IS 39 YEAR OLD CAR (very few run now,)
buy it dead?
BACK THEN, THERE WERE ONLY PAPER BOOKS
NO PDF, NO DIGITAL DOCUMENTS AT ALL.
THE MEANS ONLY GOOGLING FOR SCANS OF SCHEMATICS IS ONE WAY TO FIND THEm. (and to search add the engine name)

WHAT TO DO IS.
IF IT DOES CRANK IS:

• check compression on the engine,
• check for spark next on all cylinders, not just1.
• now try test fuel (spray can, ) for 3 second run if cars fuel system is dead.
• fix bad fueling if spray fuel makes engine sound good.

takes tools. , meter and gauges to find the problem.

now my wild useless guess.
bad spark plugs ,bad wires, to them
all filters clogged,
if lucky., only that. called tuneup in the olden days

84 350 quadrajet 4 barrel diagram

This one should be close.

Check this diagrams and click over images for zoom...



Fig. 101: 1984 4.1L engine-Federal and high altitude with manual transmission (G10, 20 and 30 models)




Fig. 102: 1984 4.1L engine-Federal and high altitude with manual transmission (G10, 20 and 30 models)




Fig. 103: 1984 4.1L engine-Federal with automatic transmission (G10, 20 and 30 models)




Fig. 104: 1984 4.1L engine-Federal with automatic transmission (G10 and 30 models)

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This web site will take you to your diagram
http://www.bestvalueautoparts.com/RenderScriptTemplate.epc?_cmd=epccat_VehicleWHD&yearid=1997%40%401997&makeid=31%40%40GMC%40%40T&modelid=6650%40%40SUBURBAN+C2500+3%2F4TON4x2&engineid=18575%40%40V8%2D350ci+5%2E7L+F%2FI+Vin+R%40%4018575&catid=2%40%40Belts%2FHoses%2FCooling&subcatid=38%40%40Specifications&mode=PA&source=GOOGLEBASE&clientid=BestValueAutoParts

Good luck and thanks for your question and I hope my suggestions help. burdfrenzy
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