My 2.0 with stock fuel injection has a consistent missing at idle and all engine speeds. At idle, disconnecting the wire to the #1 fuel injector makes no difference, but disconnecting any other injector wire makes problem much worse and eventually stalls the engine.
The voltage reading from the #1 injector input plug varies from .19 to .28 volts at idle. That doesn't seem like much, but what should it be? (I didn't test another cylinder because I ran out of time to fool with it today.)
Plugs are new and valves have been adjusted. Seems pretty clear that the problem is at #1 cylinder.
Just check the voltage on the others and compare.
You will need a oscilloscope if you want to measure voltage while the injector is firing.
If it was me, I would replace the injector connector. They sell them with 8-10" of wire.
The injectors operate at 3volts. Got that info from a Bosch D-jet manual. Ray
The signal is a pulse, nd28 is likely correct - you will need an O-scope.
Swap the injectors, might be a stuck injector.
If that doesn't work, swap the 1 and 3 connectors and see if 1 fires. If it does, it's the signal on 1.
I suspect spark.
You can use a voltmeter if you integrate the pulse width over the period from one pulse to another. If you assume the pulse width is 1/10th of the period, then the average dc voltage measured would be 1/10th of the pulse voltage or .28x10=2.8v.
Best to check the other injector voltages. You could Swap injectors and see if the failure follows the injector or is the connector.
Hi Timofly, you guys have Mr.Injector (*) in USA, I read good stories about them, only 17,50 dollars per injector...I wish we had that service/price over here.... just drop all 4 there plus 2 from your spare ones to have good spares as well.
(*)Of course there are many similair services/companies, but I just picked one that I see sometimes mentioned on forums.
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