Post by
alexf20c »
https://forums.nicoclub.com/alexf20c-u34818.html
Mon May 03, 2010 3:39 pm
how many miles? does the motor seem to crank over much faster than usual? if yes, then your timing belt may have let go. if that's the case, your motor is toast as the valves probably contacted the pistons, causing serious damage.
how did you check for spark? if you simply removed a spark plug, and grounded it to the block and looked for spark, that doesn't guaranty a good ignition system. with our primitive and antiquated distributor design, it's not uncommon for the distributor cap to develop a short or cross-short within its own contact points. for example, it will send the spark to cylinders #2 and #6 instead of #3. in this scenario, your method will still show spark, but there is no way to verify it is going to the right cylinder.
a distributor cap is inexpensive and a regular maintenance item, so i suggest replacing it as well.
now will also be a good time to replace your spark plugs. after cranking and cranking and cranking with good fuel and no spark, your cylinders are in doubt supersaturated in fuel. your plugs will be fouled and if they are old and worn out, they will be incapable of burning off the raw liquid fuel which has accumulated in the cylinders. bad spark plugs can definitely cause a no-start even after the initial problem has been repaired, simply for the reason above.