If the crankshaft is turning, it should produce spark, regardless of camshaft or valve action.
The answers given here are a perfect example of how a modern engine component failure causes a domino effect, you must go through each involved component one at a time, eg. check or replace valves, install timing belt, check action visually, by turning over engine without plugs in, and check for blue spark, if spark is orange, your pack or leads may be shot, instal plugs anyway, try to start, if no, then have CA sensors checked or replaced, then look at coil pack, but, it still may be more cost effective to buy a complete accredited used working engine, and cut your losses. Best of luck.
The spark system and the valves are two different systems
bent valves will not allow compression but will have nothing to do with the spark
As was stated if the cam shaft is not turning then there will be no signal to make a spark
However if you have replaced the timing belt and it still doesn't spark look at areas like cam/crank position sensors and immobiliser
If you have a 2.4 dohc engine, i have never seen bent valves from a broken timing belt. i dont know what engine you have so that would help. why do you think the valves are bent?
It is a 2.4dohc cant figure out why it wont spark on 2 and 3 cylinders already replaced coil pack, cam sensor, crank sensor, and it does run its got me stump any idea?
if you are sure there is no spark then i would start to think the coil drivers in the computer arent firing the coil. did you check it for spark or are those cyls. just not firing? if it has spark when you check it at the plug wire by putting a plug in it and ground it to the engine. if it dosnt spark check your plug wire with an ohm meter to make sure its ok. if you replaced the belt and it ran good before that, double check the belt timing marks, its easy to get them wrong.check these things and get back with me
you will not have compression with bent valves nor will you camshaft be turning the short reply is with bents valves then your timing belt has snap so your engine is dead .if you have a good body on her then fit an engine from a car breakers but try to get a good one.
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If your valves are bent ,then i take it your timing belt has snapped .which means your camshaft can not turn ., so you can not get a spark at the plugs.if it was the old distributor you would have been able to check the coil with a spark plug tester the trouble is with a coil pack it is controlled by both sensors and your ECU but due to the camshaft not turning so your camshaft position sensor can not tell the ECU to fire the coil pack.
Motor i have replaced timing belt crank and cam sensor also replaced coil pack motor runs but don have spark coming from coil
Motor i have replaced timing belt crank and cam sensor also replaced coil pack motor runs but don have spark coming from coil on 2 and3 cylinders
that is an interface engine lot of damage done when your timing belt snaps cheaper to fit an other good engine from a car breakers.
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