Search found 19 matches

by HC_CDC
Fri Aug 01, 2014 1:27 pm
Forum: Diagnostic discussion
Topic: WPS500X Pressure transducer back leakage tests
Replies: 25
Views: 15716

Re: WPS500 Pressure transducer back leakage tests

Hello Henk and thank you for the feedback, it is much appreciated and a great theory too. What is interesting is the pulsations in the spill rail align just before the trough of the spill waveform! Again, more research required as any potential expansion of the spill hoses has been eliminated with ...
by HC_CDC
Wed Jul 16, 2014 8:42 pm
Forum: Diagnostic discussion
Topic: WPS500X Pressure transducer back leakage tests
Replies: 25
Views: 15716

Re: WPS500 Pressure transducer back leakage tests

Hi Steve, Thanks for your thoughts, as you say, not really a "that must be it" explanation. A while after I posted the question it suddenly came to me that it could well be that what you see is a delayed pressure pulse after the injector fires. We have to take into account that the back leakage/cont...
by HC_CDC
Sat Jul 12, 2014 3:41 pm
Forum: Diagnostic discussion
Topic: WPS500X Pressure transducer back leakage tests
Replies: 25
Views: 15716

Re: WPS500 Pressure transducer back leakage tests

Great investigation Steve.

How would you explain that the return channel pressure actually starts to rise before the pilot valve is lifted?
I can`t find any explanation yet..

Cheers,

Henk
by HC_CDC
Mon Jun 16, 2014 1:21 pm
Forum: Diagnostic discussion
Topic: Emissions problem BMW M3
Replies: 3
Views: 2413

Re: Emissions problem BMW M3

I don't know if it the intention of this forum but that will be told by some administrator. Obviously you need an answer quIckly and if you haven't solved the problem yet; you may want to look at a false lean situation, leak in exhaust system upstream or near lambda sensors 1.1 and/or 2.1.. ECU will...
by HC_CDC
Sun Jun 15, 2014 12:46 am
Forum: Diagnostic discussion
Topic: VW Caddy SDI 2.0 2007 failing PD injection
Replies: 4
Views: 4911

Re: VW Caddy SDI 2.0 2007 failing PD injection

by Robski » Sun Jun 15, 2014 12:57 am Firstly, that first post is a block of text, I had to read it over & over ! A block of text is normally needed to describe a situation, don't think there is too much nor too little info given, don't yap just for yapping Robski, in Spain they call that being "pe...
by HC_CDC
Sat Jun 14, 2014 2:33 pm
Forum: Diagnostic discussion
Topic: VW Caddy SDI 2.0 2007 failing PD injection
Replies: 4
Views: 4911

Re: VW Caddy SDI 2.0 2007 failing PD injection

What am I saying, this is not piezo, this is ordinary coil so then it must be a driver problem, too much reading about piezo injectors I guess, :oops: anyone?

Henk
by HC_CDC
Sat Jun 14, 2014 12:59 pm
Forum: Diagnostic discussion
Topic: VW Caddy SDI 2.0 2007 failing PD injection
Replies: 4
Views: 4911

VW Caddy SDI 2.0 2007 failing PD injection

Hi All, Anybody seen this before, I have to decide (preferably without changing injectors locations), if this is a driver problem or an injector problem? DTC on arrival, injector 1 outside regulating limits. Sometimes ran on 3 cylinders even after restart and @idle. Started discarding probable cause...
by HC_CDC
Mon Jun 02, 2014 1:55 pm
Forum: Diagnostic discussion
Topic: 1973 Caddy eldorado ignition sores
Replies: 16
Views: 7364

Re: 1973 Caddy eldorado ignition sores

OK, forget that last question. Already saw that I can select +-1V/div and then zoom in on the 500 mV (ambient pressure with this 1000 kPa sensor) area, with the 2204 best resolution here will be 1/256 (8 bits) of 2000 mV (+1 to -1 V DC) = 7.8 mV, correct? On screen slightly different though, signal ...
by HC_CDC
Sat May 31, 2014 11:50 pm
Forum: Diagnostic discussion
Topic: 1973 Caddy eldorado ignition sores
Replies: 16
Views: 7364

Re: 1973 Caddy eldorado ignition sores

Hi Steve, Thank you for that challenge as every day I study here at Pico, and I too, like us all, are learning about such techniques and features. Whilst digging and delving into the pro and cons of Vertical Resolution I found this great short video on our PicoTV channel on YouTube https://www.youtu...
by HC_CDC
Sat May 31, 2014 11:37 pm
Forum: Diagnostic discussion
Topic: 1973 Caddy eldorado ignition sores
Replies: 16
Views: 7364

Re: 1973 Caddy eldorado ignition sores

Let’s continue the story a bit. The client called me this week that he had fitted all the new stuff, electronic pickup/reluctor, new coil specified for this car using resistor wire, new resistor wire, new distributor cap and rotor, but that the misfiring remained the same so that those parts apparen...