Question for National Service Manager or Experts on ECM
#21
08-28-2018, 12:15 PM
What do you mean starter spray is lubricated type?
Did you or did you not use starter spray??
Hyundai cars use a waste spark system.
In other words, the coils will fire twice for the pair of cylinders
One cylinder will be in compression and ready for spark
The other will be 180 degrees out in exhaust (this spark will do nothing)
Think about it, the ECU sends signal to coil to fire when it gets a signal from crankshaft sensor that it is in right position
So if there is spark, the ECU and CKS are working.
As Hanky says, check to see if the timing belt or chain is in good condition and moving valves.
If timing belt then sounds like it broke. If timing chain then it sounds like it jumped.
Either that or check for compression with a gauge.
If a car overheats then it will continue until it is shut down or the conditions for engine to run are no longer available.
Overheating usually affects the head gasket. Burns them to have holes between cylinders.
Sometimes coolant will flow into cylinders or vicesa versa
Do a leak down test.
Good luck
Did you or did you not use starter spray??
Hyundai cars use a waste spark system.
In other words, the coils will fire twice for the pair of cylinders
One cylinder will be in compression and ready for spark
The other will be 180 degrees out in exhaust (this spark will do nothing)
Think about it, the ECU sends signal to coil to fire when it gets a signal from crankshaft sensor that it is in right position
So if there is spark, the ECU and CKS are working.
As Hanky says, check to see if the timing belt or chain is in good condition and moving valves.
If timing belt then sounds like it broke. If timing chain then it sounds like it jumped.
Either that or check for compression with a gauge.
If a car overheats then it will continue until it is shut down or the conditions for engine to run are no longer available.
Overheating usually affects the head gasket. Burns them to have holes between cylinders.
Sometimes coolant will flow into cylinders or vicesa versa
Do a leak down test.
Good luck
Yes I understand the spark system. One spark for ignition, the other doesn't do anything.
No the belt isn't broken.
Yes it is possible that the head gasket blew absolutely.
#22
08-28-2018, 03:14 PM
If you don't know of this simple test , you could overlook something.
Take a small sample of the gas you are feeding into the engine and dump it on concrete or metal plate. Attempt to lite it with a match. If it lites and burns , OK
If not, it is NO GOOD ! Simple , but effective.
I am concerned with the engine cranking over effortlessly . It demonstrates lack of compression. Something is getting past us and we are overlooking it.
Even if the fuel is good and the spark is at the wrong time the spark plugs still should ignite the fuel and create a backfire or some kind of resistance to starting. We are getting nothing ,,,,,,,,,,,,,,,why not ?????
When you are rechecking the timing set up are you cranking the engine in the correct direction of rotation?
Is coolant getting into the combustion chamber and preventing the plugs from igniting the fuel.
If the plugs are wet,,,,,,,,,,,,,,,,,,,,,,wet with what,,,,, coolant,,, or,,,,, fuel,,, or water?
If it is good gas that should ignite if you held a lit match to the wet plug also.
Take a small sample of the gas you are feeding into the engine and dump it on concrete or metal plate. Attempt to lite it with a match. If it lites and burns , OK
If not, it is NO GOOD ! Simple , but effective.
I am concerned with the engine cranking over effortlessly . It demonstrates lack of compression. Something is getting past us and we are overlooking it.
Even if the fuel is good and the spark is at the wrong time the spark plugs still should ignite the fuel and create a backfire or some kind of resistance to starting. We are getting nothing ,,,,,,,,,,,,,,,why not ?????
When you are rechecking the timing set up are you cranking the engine in the correct direction of rotation?
Is coolant getting into the combustion chamber and preventing the plugs from igniting the fuel.
If the plugs are wet,,,,,,,,,,,,,,,,,,,,,,wet with what,,,,, coolant,,, or,,,,, fuel,,, or water?
If it is good gas that should ignite if you held a lit match to the wet plug also.
Last edited by hanky; 08-28-2018 at 06:43 PM.
Thread
Thread Starter
Forum
Replies
Last Post