diagnostics

[Clancy]

having problems with engine conversion. wondering if the engine check lamp or engine diagnostics not being connected will make the engine fail to start. the motor is a suzuki gti DOHC going into a sierra.

the main relay and fuel pump click in but the engine won't fire. any suggestions?

[mechtech]

g'day,, sorry bout the late reply,, got a scanner now,,
first off check spark at each pot,
next check fuel flow (get a tin or something) then pressure,, careful. very high pressures,, can be 80-120psi of fuel
also check injector pulse,, a noid light,, or even a 4-5v led, also check that they all have power or earth as a constant with ing on. depending on system..
if thats all good,, its down to compression and timing - dizzy and cam belt.
good luck and let us know how ya go..
again sorry about the late return of you message,,

[crankycruiser]

DOnt laugh but when i wired up the 4age in my mates zook we ok the coil off the firewall caue the coil lead was too short... then wondered why it wouldnt go.....

the coil wasnt earthed!!!

just a thought 4 ya

[murcod]

I'll own up too..... Did an EFI conversion and it wouldn't start. I was puzzled as I'd carefully followed the EFI wiring diagrams.

After a while I worked out the reason- the coil didn't have a 12v supply (it wasn't in the EFI wiring diagrams and I'd forgotten it )

[Modified Toy]

Is it the australian engine or an import engine?

Is the throtle body on the manifold or it the intake hose?