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blazer doesn't start!

C

cerryblazer

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May 26, 2008
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Monza
hi guys!
i need your help as always!
i replaced, on my truck, a new carb, a new distributor, new spark plugs wires, set timing ignition with TDC at piston #1, but my blazer doesn't start.
engine crank, starter is ok but nothing.
i re-checked all and everything is ok.
any idea??
thanks guys!
Fabio
 
Check if carb is getting fuel. If so move on. Check for spark. Of spark check spark plug wire routing and firing order is correct. Try a lil starter fluid down yhe carb or pour a lil fuel into carb and see what it does. Let us know what it looks like.
 
thanks for reply!
i checked all steps 10 times, everything is ok.
fuel arrives from pump to carb with squirts inside intake manifold.
i can see sparks from spark plugs so ok.
i realize right know that if i turn the harmonic balancer pulley on 0 mark to find TDC, the rotor of distributor, is not really in front to the #1 piston but more towards the #2 piston!
I hope that my timing chain has not jumped a tooth!!!! it would be very weird because engine cranks with the usual sound, in this case, I would hear a difference in the engine!
or not?
thanks again
Fabio
 
Number one is front right side and 2 is front left side. Rotor should be pointing torward front right side of engine. It would be a big jump to go that far. Make sure you are at true tdc on the engine. Pull the distributor again and spin the distributor back torward number one cylinder. Your firing is way off where the distributor is sitting right now. You may have to get a long flat tip screwdriver to align the oil pump down at the bottom where the distributor sits. That should get you running and then set your timing again.
 
ok i aligned the oil pump but i can't explain how the groove of oil pump has moved!!
 
i tried to align the groove of the oil pump, now rotor point piston #1.
engine crancks but it doesn't start.
i don't know what else can i do
thanks
 
your dissy might be 180 off. pull the #1 plug, cover the hole with a finger and crank the engine by hand till you get blowby. You should now be just shy of DTC. Turn the engine to DTC then check where your rotor is pointed.
 
hi guys,
i realized that turning the engine by the end with opened valve covers, nothing moves....
maybe the timing chain slipped off or broken, but i don't understand why the rotor of distributor continues to turn with harmonic balancer and pistons. the distributor is connected to camshaft, right???
thanks
Fabio
 
cerryblazer said:
hi guys,
i realized that turning the engine by the end with opened valve covers, nothing moves....
maybe the timing chain slipped off or broken, but i don't understand why the rotor of distributor continues to turn with harmonic balancer and pistons. the distributor is connected to camshaft, right???
thanks
Fabio
Click to expand...

The cam turns the distributor. So if that is spinning, the cam is intact. Maybe the cam lobes are dead. Have you tried adjusting the valve lash again now that the valve cover is off? At tdc both valves on number one cylinder should be closed and you adjust it til there is no play and slight drag on the push rods.
 
Well, if it was a Ford, I would say that your camshaft had broken right behind the distributor gear.
But, since the gear is on the far end of it on a GM engine, I don't see how the dizzy could be turning without at least some of the valves moving.

It was running before you worked on it, right?

I can't envision a situation where all the cam lobes wore down flat at one time. Unless someone else has been working on it and has backed off all the valves, I'm not sure what it going on.
 
ok guys, finally engine started but it has a very rough idle also if i turn the distributor cap. i tried just a couple of times, tomorrow i try with timing lamp.
i hope that it's just a question of turning a little the distributor to find the correct timing and not a jump of some tooth of the chain...
thanks
Fabio
 
ehy guys, i have a very rough idle now. i don't understand why, when i push down accelerator pedal, i see the jets of fuel jumping out from carb and not sucked into carb!
it seems that the engine runs with 6/7 cylinders and not 8.
any idea?
thanks again
Fabio
 
At least it's running. Did you adjust the valves to get that correct? Timing it ought to help smooth it out. My timing doesn't match my balenced so I just do it by ear. I've Ben doing it so many years I know where it runs best by listening to it. Haha. Glad you at least got it going.
 
HI guys! yes at least it's running! thanks!:laugh:
the plug wires are in the correct position and sinceraly i didn't touch the valves because i thought that if they are ok before, maybe they are ok now.
surely i will adjust the valves too also if i think it's a problem of timing.
also if i turn the distributor cap the engine doesn't run better, just a little.
the carb is new, maybe i must adjust mixture screws?
thanks
Fabio
 
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