I have officially given up on getting my Matrix working.
I have finally killed the pullstarter after 983483 attempts at getting it running.
It starts sometimes, runs for a minute or 2, then cuts out (doesn't overheat) then it won't restart. Only been able to put 3 tanks through it in 2.5 weeks of trying.
I have spent $ on it as well...
-replaced ther Glowplug twice
-replaced the fuel lines
-cleaned fuel filter
-set needles to factory settings (many times) and 20 other 'recomended settings'.
-threatened it with violence
I have 2 other nitro cars and both start after the 3rd-5th pull using the same fuel (20%) and glowstarter.
A friend who has been into r/c cars/planes and boats for 20 years spent 2 hours on it yesterday using an Ofna starter box. He got it running for around 2 minutes before it died and wouldn't restart evening after cooling down. His final verdict 'this engine is stuffed mate'.

Such a shame as I really like the car, but I am starting to kick myself over buying this thing instead of a PBS Hyper 7 with starter box for the same price...

I have sent a email to Cen asking if the engine can be replaced seen the car is only a few weeks old.