My 1989 gmc sun rest with a 454 won't start but tries. Fuses are good, wires and connections are good.
what in the world is a SUN REST, (crest RV?) if RV post to RV not cars.
Q1, WHEN DID RV LAST RUN GREAT, LAST YEAR, LAST DECADE OR NEVER SEEN BY YOU EVER.
Q2; IS FUEL ALL GOOD,? NOT OVER 1YEAR OLD>?
CLASS A CHASSIS BY GM
the starter motor must spin fast, and be robust.
battery good, and fully charged, it must be.
MOST ENGINES THIS OLD ARE NOT GOOD, TEST THAT YET USING REAL TOOLS?
NEXT IS
if spark is good, for sure not that old ever.
the test fuel works ever use instant spray start in a can
3 second spray gets 3 seconds run (at least)
and engine sounds good , repeat 3 times
is this TBI> throttle body injected? OR CARB>? OR MPI INJECTED
GUESS GM L19 ENGINE
GEN IV:
General Motors introduced EFI in 1987, which was found on GM C1500 SS, C/K2500 and C/K3500 trucks. The 454 EFI version was rated from 230 hp (172 kW) to 255 hp (190 kW) and from 385 lb?ft (522 N?m) to 405 lb?ft (549 N?m) of torque.
THE 89 , C/K3500 CHASSIS, 454 HAD TBI INJECTION HORROR AND A DISTRIBUTOR
THE LATER NEEDS, NEW ROTOR,CAP, HV WIRE SET AND 8 NEW SPARK PLUGS IF NOT NEW AND FRESH NOW UNDER 60MILES OR 5 YEARS OLD.
i WILL STOP HERE AT TBI MESS.
I;D FULLY KIT OUT THE TBI, NEW FUEL FILTER AND FOR ONLY FRESH FUEL.
3/27/2023 6:49:38 PM •
RVs
•
Answered
on Mar 27, 2023
