My brother is building a mk2 cortina with a jag xlr supercharged v8 got a omex 600 with a omex base map, problem were having is will spark only now and again eg cough splutter then just carry on turning over with no spark but still seem to be getting fuel ok, anyone got any ideas or had this problem before ??

 

You're saying a sync problem, so surely you're already doubting cam or crank signals ?

So have you checked these ? Are you getting a usable signal from both ?


And if it isnt getting a suitable crank/cam for sparks, then it could not be fueling correctly either.

Is there any sort of logging or a scope to check these signals ? Or any error reporting or diagnostics for invalid crank/cam triggers ?

 

Pretty sure Omex 600 will spark with just a crank signal, plug it in and have a look.

 

Most aftermarket ecu's can run off crank only. Whether that's how they are set up or not is another matter.
And spark and correct spark are two different things.

Kev does suggest a random spark, or at least irregular. So it would imply a dodgy crank signal of some sort, assuming the actual hardware installation is sound as far as wiring and coils go, as well as setup for these items.

 

Steve weve tried a different crank and cam sensors just to make sure and theyre using standard brackets/triggers and double checked the wiring and cant find anything obvious also sent the base map back to omex yesterday morning but heard nothing as yet,

 

There is little sense swapping sensors for the sake of swapping them

Check their output, that's what matters

 

Its all reading we think going off laptop values

 

Omex 600 doesn't use a cam sensor

 

had this with my 710 would turn over fire then loose signal , omex had to do an update??? so they told me then it was ok, check with omex there very helpful

 

Kev,

With the laptop connected - click the 'Start' icon, then in your Parameters you should have a box titled "Stat Sync" - this needs to change from OFF to ON during cranking. If it's doing that, then the trigger pattern programmed into the ECU and the trigger wheel references are compatible and your problem is elsewhere.

Did OMEX make you the wiring loom or have you done it yourself? Have you wired the ignition/fuel in cylinder order or firing order?

As Martin said, OMEX600 doesn't use a cam sensor input.