Once again our baby will not start. Starter turns, fuel pump runs, cold start injector is spraying, just no spark at the plugs. Other than the alarm, (which I have not verified is the problem) what could be causing this? Anything I have missed in my list of checked items?
BTW...finished the new brake lines today. They look sweeeeet!!!!! Too bad no one can see them.
Try cleaning the engine connectors on the left side of the compartment with electrical spray cleaner. My coil voltage went from 10.5 volts at the positive terminals to 12.3 volts and now the car starts and runs. Don't ask me how long it took to diagnose this problem...Patrick
The only thing not on your list that I can see is Pick-Up Sensors signaling Digiplexs. After everuything is powered up, the Pick-Up Sensors have to send a signal to the Digiplex Units to trigger the coils to fire.
It is possible to make a PUS tester with a .3v bulb and leads hooked to the PUS plugs. As the flywheel trigger passes by the PUS it collapses the internal field producing a minute electical signal. They can also be tested with an ocilliscope by viewing their sine wave pattern.
JR was right on the money, again! I disconnected all three flywheel sensors and cleaned the connectors up all nice and pretty like. )Not an easy task as they are buried under all the hoses on the driver's side of the engine.)Once they were cleaned, she fired right up.
Thank you again JR for the expert advice and walking me through the diagnosis process. Couldn't have done it without your help. Also, thank you Patrick for your insight as well. Now I can test the new brake lines, but that will have to wait until tomorrow as I have a date with a go-kart tonight.
I have exactly the same problem with my 308QV. No spark trigger at coils. Power to Digiplex and coils ok
Will test pick up sensor tonight.
Thnx
Adrian
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Ferrari Forums
31.9K posts
16.3K members
Since 2003
A forum community dedicated to Ferrari owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more!