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Ford Mondeo (Europe) Duratec 1.8 Injector Signal

  • Ben0815
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3 years 8 months ago #54271 by Ben0815
Ford Mondeo (Europe) Duratec 1.8 Injector Signal was created by Ben0815
Hello everybody,

got me a small 2-channel PicoScope in order to find the cause for a rough idling engine with slightly fluctuating rpm on a Ford Mondeo MK3 1.8 (B5Y) Duratec HE 2006 (Europe). No DTCs, no misfire counter, PCM is a Visteon "Black Oak" with integrated EDIS Ignition System.

When scoping the injectors, I got these waveforms (s. attachments), which show at first single - then suddenly appearing - double injector signals. These inconsistent signals seem to be in sync with the audible and perceptible misfires of the engine when running (here: at idle). They appear spontaneously on all cylinder with the exact pattern.

In addition I scoped the crank- and camshaft sensors (s. attachments).

Can somebody evaluate these waveforms/signals?

Thank you,
Ben
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  • juergen.scholl
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3 years 8 months ago - 3 years 8 months ago #54277 by juergen.scholl
Replied by juergen.scholl on topic Ford Mondeo (Europe) Duratec 1.8 Injector Signal
Ramón fro Kentucky Home Garage encountered something similar on a Ford Focus.





The double pulse may be a computer strategy to stabilize the idle.

Scoping makes a lot of sense to me BUT you need to compare your results to something known, may this something be good or bad. In this case you seem to lack a reliable reference.

Does anything stand out in the scan data, fault codes, freeze frame. Which other tests have you done?

You probably will find misfire data in mode 6....
An expert is someone who knows each time more on each time less, until he finally knows absolutely everything about absolutely nothing.
Last edit: 3 years 8 months ago by juergen.scholl.

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3 years 8 months ago #54279 by Andy.MacFadyen
Replied by Andy.MacFadyen on topic Ford Mondeo (Europe) Duratec 1.8 Injector Signal
What is happening with your B1S1 and fuel trim?
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  • Ben0815
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3 years 8 months ago - 3 years 8 months ago #54297 by Ben0815
Replied by Ben0815 on topic Ford Mondeo (Europe) Duratec 1.8 Injector Signal
Thanks for the replies - I attached some screenshots with DTCs, Mode 6 and O2/fuel trims. There is also a video of live data:

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Last edit: 3 years 8 months ago by Ben0815. Reason: edit2: embedded video link not visible, link added

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