i have an 88 chevy k2500 barley runs backfires through throllte body and
when i disconnect timming connector it runs much better i replaced map
sensor/ egr valve/ecm/esp module and still no luck i appreciate any help i
And to check the timing chain without taking it all apart...
Rotate engine 1/2 turn or more BACKWARDS until the timing mark is around ten
Place clothes pin (etc) on distributor body by the trailing edge of rotor.
Slowly rotate it forward until the rotor JUST moves (the pin above is just
so you can see this easier).
If you get more than about 8-10 degrees of movement, there's a good chance
it's stretched and jumped.
hello my friend at work just ran into same thing on a c1500 4.3, changed all
sensors,check and rechecked timing, put in new fuel regular, checked fuel
pressure and it was in spec but on the lower end, put in new fuel pump and
cured the problem. hope it hopes, ps i think fuel pressure should be between
8 and 14psi but could be wrong. so double check specs.
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