PicoScope 7 Automotive
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Audi TT - incyl pressure
Audi TT - incyl pressure
Hello
May I request some enlightenment on analysis of the attached waveform.
I can see some exhaust restrictions of some kind but not sure what it could be.
May I request some enlightenment on analysis of the attached waveform.
I can see some exhaust restrictions of some kind but not sure what it could be.
- Attachments
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- 20200824-0001 - cyl 4 - in cyl.psdata
- (9.61 MiB) Downloaded 334 times
Re: Audi TT - inc, cyl pressure
adding cyl 3 waveform. could this be anything to do with timing ????
- Attachments
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- 20200824-0001- cyl 3.psdata
- (6.22 MiB) Downloaded 340 times
Re: Audi TT - incyl pressure
Chad66,
I cant make a whole lot from your capture, couple suggestions:
attach a zoomed out scan
also there are no notes or channel labels.
I cant make a whole lot from your capture, couple suggestions:
attach a zoomed out scan
also there are no notes or channel labels.
Re: Audi TT - incyl pressure
So sorry, am very new to the use of the picoscope and am not really sure how to setup the sys. will try and revert with a zoomed out scan.
Re: Audi TT - incyl pressure
No problem, keep trying and learning... would also suggest detailing what kind of repairs have been done prior to this problem and what symptoms your car currently has.
Re: Audi TT - incyl pressure
No problem, keep trying and learning... would also suggest detailing what kind of repairs have been done prior to this problem and what symptoms your car currently has.
Re: Audi TT - incyl pressure
Hello Everyone,
TT problem solved..... As we suspected an issue on the ex side, we progressed to remove the valve cover and examine the lifters, rockers and camshaft and to see if any oil pressure blockages. all checked out ok except for the camshaft, Although no visible damage we fortunately had an old exhaust cam from another engine in stock. put them together and what do we see.. cam lobes out of sync when matching them up at similar points. put in the used replacment cam and boom vehicle started up and running perfect. Dont ask me how the lobes got out of position as this car was sent to us from another garage who had rebuilt the engine. And now as Im examining the wave form, trying to correlate the positions of the exhaust valve opening and closing to make sense of what i see. Very interesting.
Thank you guys for the input and thank Pico for pointing me in the right direction, I would have been going bonkers trying to find a starting point for this case.
TT problem solved..... As we suspected an issue on the ex side, we progressed to remove the valve cover and examine the lifters, rockers and camshaft and to see if any oil pressure blockages. all checked out ok except for the camshaft, Although no visible damage we fortunately had an old exhaust cam from another engine in stock. put them together and what do we see.. cam lobes out of sync when matching them up at similar points. put in the used replacment cam and boom vehicle started up and running perfect. Dont ask me how the lobes got out of position as this car was sent to us from another garage who had rebuilt the engine. And now as Im examining the wave form, trying to correlate the positions of the exhaust valve opening and closing to make sense of what i see. Very interesting.
Thank you guys for the input and thank Pico for pointing me in the right direction, I would have been going bonkers trying to find a starting point for this case.
Re: Audi TT - incyl pressure
Well done.
That moment when you realize a scope made you succeed, it’s priceless.
That moment when you realize a scope made you succeed, it’s priceless.