Re: 24valve Timing
Originally posted by 2-ND TIME
low on power
have bucking
the engine heats up quickly or very quickly making dynoing almost imposable
non working viscious fan .
Low Power/Bucking,, Sounds like a Bad lift pump to me. The timing will be horrendously off with the VP44 trying to pull a Vacuum, both advanced and retarded (some cylinders fire advanced, some retarded)
First test is to see if you can hear your lit pump running with the first "key-on" The pump should run for about an 1/8th of a second or so, then "Bump" the starter, the Lift pump should run for 20 or so seconds. If you can hear the pump, that's a good sign, but doesn't mean that it is working... Check your fuel pressures. . Either on top of your filter housing, (Test port closes to center of housing is post-filter, farthest out is pre-filter)
A healthy lift pump should have atleast 15PSI at prime (engine off, Lift pump Running) and, depending on mods, 8-2PSI at WOT (Big injectors, High HP "box", will bring PSI lower)
High Heating / Quick heating Sounds like a stuck Thermostat (closed) Try running your heater on High and see if your temps drop a little.
Viscous Fan Clutch,, Cold be a problem,, but only if you are working the motor very hard. . Many members run fanless through the winter months,, even in temps up to 70*F
Hope this helps,,
Check those Lift Pump Pressures.