Search found 5 matches

by aux_r
Wed Jul 10, 2013 8:48 am
Forum: Case studies
Topic: Jaguar S-Type 2.7D with hesitation at idle
Replies: 14
Views: 19232

Re: Jaguar S-Type 2.7D with hesitation at idle

Valhalla wrote:Is the 2.7 TDV6 a Denso 2-piston HP pump then? :wink:
No, the jaguar S-Type 2.7D CR has a Siemens system PCR 2.3 Lion V6 with a 3 plungers radial HP. The Denso system with 2 plungers is about the example of Fat Freddy.
by aux_r
Tue Jul 09, 2013 5:40 pm
Forum: Case studies
Topic: Jaguar S-Type 2.7D with hesitation at idle
Replies: 14
Views: 19232

Re: Jaguar S-Type 2.7D with hesitation at idle

Remembering, of course, that the first rule of Diesel injection HP pump design is to drive it at a ratio that does not match the camshaft or crankshaft, for the very reason your example shows above! Sorry, I can't agree with this point of view on this kind of pumps. If we see the technical informat...
by aux_r
Sat Jul 06, 2013 1:59 pm
Forum: Case studies
Topic: Jaguar S-Type 2.7D with hesitation at idle
Replies: 14
Views: 19232

Re: Jaguar S-Type 2.7D with hesitation at idle

Thank's for all comments, I agree with most of the points of view of Valhalla about this case of study. I would like to comment my point of view about some of the questions and topics exposed here trying to clarify the images showed by Fat Freddy. First of all it's known the type of HP pump. In the ...
by aux_r
Thu Jul 04, 2013 5:26 pm
Forum: Case studies
Topic: Jaguar S-Type 2.7D with hesitation at idle
Replies: 14
Views: 19232

Jaguar S-Type 2.7D with hesitation at idle

Jaguar S-Type 2.7D with hesitation at idle. No DTCs registered. Engine’s behavior suggests a problem with one or some injectors. So we decided to test the injection using the scope to confirm and identify the fault injectors. With engine running at idle condition, we measured the injection pulses in...
by aux_r
Thu May 30, 2013 6:52 pm
Forum: Diagnostic discussion
Topic: 2008 Vauxhall Vivaro piezo injector currents
Replies: 17
Views: 13761

Re: 2008 Vauxhall Vivaro piezo injector currents

Hi, I agree with your first post, it seems a problem with piezo crystal in injector 4. In the attached file you can see a good piece injector working. If you get voltage versus current capture probably you see a voltage lost relative to the lost of the capacity of the crystal. I think so, because th...