I have an interesting situation here and hopefully some one has some more ideas.
The car was brought home running rough. It has since only been started once in 3 months with lots of smoke.. I wasnt there but was told it was white. All plugs were replaced prior to that start so they have 5 minutes on them.
Owner put a scanner on the car and produced no codes other than scanner stated all cylinder timings were off. (I wish I was there)
Here is a preliminary list of things looked at by myself.
Spark = yes
Plugs looked good except one a little dark. All had fuel.
Checked firing order.
Fuel = yes
New pressure regulator (by owner) but pressure not tested yet.
Oil changed by owner for fear of water contamination.
Compression all equal at around 175 psi
My initial thoughts:
After doing the compression test with all plugs removed. I replaced the plugs and tried to start. Obviously this didnt work but I can rule out any flooding or water in cylinders.
My thoughts turned to timing issues. A good compression test should rule out a timing chain.
Now onto ignition timing.
Today I am going to look into testing the Crank Posistion Sensor
Assure there is spark from all 3 coils ( I know I forgot)
Possibly pull valve cover to ensure correct valve timing.
Initially the owner wanted me to pull the intake as someonehas convinced him it was a coolant leak from there as these engines are said to be prone to that.
After clearing the cylinders I should be able to run the engine even with some water present. At least long enough to get the running engine codes.
Im having a real problem with taking a engine apart not knowing for certain what is wrong, even with him wanting this.
The trouble shooting would grow by a factor of ten after doing that and I dont think that is the real problem to begin with.
I realize the computer could be the cause but Im trying to save that for last.
(I dont have the ability to test this or a spare)
There must be some thing I havent thought of yet or a easier way to disprove some of my ideas.
Could the circuit board under the coils affect the timing?
Any and all sugestions will be considered and tested so dont be shy.
There will be beer.