TIMING IS CORRECT BUT IT SPITS SPUTTERS AND BACK FIRES
THROUGH THE CARB AND EXHAUST.IT HAS BEEN OVERHAULED WITH IN THE LAST 5 YEARS AND HAS NEW PLUGS, POINTS AND ROTOR
BUTTON. ANY IDEAS.
WAYNE
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You better find a different mechanic . Before calling a bad fuel pump ,did he do fuel pressure test ? Did he test the electrical circuit ? Did he check mass air flow sensor ,injectors , fuel regulator , engine senors ? How many miles on the vehicle , is the engine in good shape ? Timing chain ?
Time for the dealer to take a look. You need special skill and special tools to diagnose this not to mention years of experience with electronic engine control systems.
Sounds to me like your choke is malfunctioning. Take the cover off of your carb when cold and see if the choke (top buttefly valve) is closed. It should be when cold. (you do not say what year truck you have so I am guessing as to the answer)
Firing order 1-5-3-6-2-4 -------------
front | |
of | 1 2 3 4 5 6 |
vehicle | |
Distributor rotates clockwise ------------
The Spark Plug Gap
.035 (In thousandths of an inch)
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