Hello,
I got this 2004 Opel Astra that comes from another garage with new Ignition coil and camshaft sensor. The problem is, it has a misfire in alternating cylinders with a code "camshaft position". But I think Crankshaft and Camshaft sensors have a good signal and the timing is set correctly. I have controlled the markings from the timing belt. The disks at camshaft and crankshaft are fixed!
During the motorstart ALL Injektor are triggered. After motorstart the four Injektors are controlled allways paired alternatingly. I think the Ignition-Timing is good.
Please look at the captures and tell me what you think is the problem.
Greetings from Munich with the worst English
Hans
Stop looking at Injectors and Ignition Coils for now.
With a Cam Position Fault Code you MUST Fix that First !
What is the Engine Code as FF already asked ?
What Exact Camshaft Code are you getting P0340 / P0341 ......... ???
Please Provide any associated Freeze Frame Data - You may have to go into OBD for that.
Is the ECU bolted to the side of the cylinder head ? If so, Get hold of the ECU plugs and Stress them with some minor violence. Can you make the fault code come and go as you wish ??
Do you have APP, Fuel Pump Relay, Immo Faults Codes ?
I note that you have scoped the Cam Sensor Backprobed at ECU CONNECTOR. The eyes of the scope will not, can not See any further than the sharp point at the end of your probe pin. It does enough to tell you if your fault is Upstream or Downstream from the Sharp end of that probe.
Hope that helps you
Last edited by STC on Fri Jun 10, 2016 8:23 pm, edited 1 time in total.
Stop looking at Injectors and Ignition Coils for now.
STC
I am sure you made a typo on who you were replying to here.
That being said
I would suggest that you compare the know good wave that was put up to the one Hans took from his vehicle and see if you see the highlighted selection I posted in my image in the known good
Should have been "Hans" Innocent Mistake. Sincere Apologies, Let us move on and try to help Hans.
Do We/Hans really have a known good Mick ?? Hans has a 2004 Vehicle, Engine code as yet Unknown. And the "Known Good" is from a 2008 Vehicle.
48 Months apart. ???? Corsa C to Corsa D - Not sure!!
I can guess that is the reason why FF asked for the Engine Code, I can be 100% certain that is the reason I asked for the Exact Engine code.
Pico provide an excellent facility in the way of the Waveform Library. I can be certain that Pico do not ask that you "Look at the nearest variable" if your vehicle and relevant waveform is not in the Pico Database.
My Previous Post and Advise (Other than the Name Typo) still stands - Sorry
Thanks to all for the good tips. Today i have another session with the Opel...
Now I am back an at first I have to tell the story:
I phone the other shop and ask about the exact history of the car. They say that the car has misfire on various cylinders. They read the codes: "anything with camshaft sensor". They change the sensor. After that the misfire was still present. Now they change the Ignition-Coil (Trial and Error ). With the Ignition Coil they change also the ignition cable. It is a bundle to buy.
Then the misfire was still not eliminated!!
At this point, the car came to me. Yesterday i made all the oscilloscope recordings.
Cause of the reply of Fat Freddy, i read the error memory once again: No errors.
Then i control the timing belt once again - no error.
After that i look at the oscilloscope recordings from yesterday. I notice something in the recording "Opel_Astra_2004_Petrol_Injektor_Ignition.psdata" (It is much longer than "Opel_Astra_2004_Petrol_Injektor_Ignition_klein.psdata". There is occasionally after the switch off the Ignition Circuit "green" a number of inductive interference in circuit "brown".
Where are they come from and maybe the interferences have a retroactive effect on the ecu?? Maybe they come from the output stage within the ignitioncoil-pack. I took the old ignitioncoil from the trunk.
After the change from new coil to old coil the motor is running perfect! The new ignition coil is faulty!
But why is the car now running? The misfire doesn´t come from the camshaft-Sensor and doesn´t come from the old ignition-coil! The old ignition-cables were broken. They had very small marten bite
Many hours and a lot of money because such a simple thing!!! The effect off "trial and error"!
Unfortunately there was no time left to hook up the pico once again for a "known good" signal.
Many many thanks for the quick response - it helps me to find the error!
Greetings from Munich
Hans
Attachments
Point A - Induktion caused by the other Ignition-Circuit? Point B - End of Injektion....
48 Months apart. ???? Corsa C to Corsa D - Not sure!!
I can guess that is the reason why FF asked for the Engine Code, I can be 100% certain that is the reason I asked for the Exact Engine code.
Yes, that's one of the reasons. As it stands, we (I) have nothing to compare it with. I certainly would not compare a cam c̶o̶d̶e̶ waveform from another model some 4 years later that may, or may not have the same engine. The recent post on the dodge motor swap using the same engine is a perfect example of why you do not do that.
As it stands I can not fault that output with what the OP has presented. I do not refer to 'nearly the same system' (the OPs description) when comparing wave forms.
Cheers
FF
edit: Crossed post.
Last edited by Fat Freddy on Sat Jun 11, 2016 9:07 am, edited 1 time in total.