hey mate i work on these things all the time,they are a bit tricky just had a car that was parked and would not start.if it has manual trans try depressing the clutch .sometimes too much crankshaft end float wont let the crank position sensor pick up a signal if not try a can of aerostart a quick spray in the air intake may start it if it starts it is either a fuel or compression issue.they heavily rely on good compression for start up