Search found 7 matches

by carl456
Mon Oct 19, 2020 7:11 pm
Forum: Heavy Duty and Off Highway
Topic: International DT466e
Replies: 12
Views: 16995

Re: International DT466e

Hi, Looking at your waveform and applying a maths channel it would seem there may be an issue with the crank signal. The maths channel appears to show crank speed increasing/decreasing at incorrect times. I am certainly not the most qualified person to offer you advice and I am sure someone will hel...
by carl456
Thu Aug 20, 2020 7:44 pm
Forum: Heavy Duty and Off Highway
Topic: Volvo D7e fuel system woes, beware Long Story
Replies: 6
Views: 17264

Re: Volvo D7e fuel system woes, beware Long Story

Hi Sharpy, sorry to hear to about your troubles. This fuel system has driven me to madness before. It looks like you have gone through it thoroughly. Did you check for filings in the filter housing? This is the first thing I check when I get the dreaded call for one of these. I find taking a fuel sa...
by carl456
Wed May 13, 2020 4:13 pm
Forum: Diagnostic discussion
Topic: A Shout for help.
Replies: 7
Views: 9088

Re: A Shout for help.

Hi Steve, thank you for the very detailed post. While I am not sure I can help you in any way, I do have a question. In your first image we can see a corresponding drop in MAF as EGR duty increases, as you would expect. The last few EGR duty cycles however result in a lesser drop in MAF, I have put ...
by carl456
Wed Feb 05, 2020 7:07 pm
Forum: Case studies
Topic: Volvo FMX V4 Euro6
Replies: 12
Views: 23399

Re: Volvo FMX V4 Euro6

Nice one Sharpy, glad it was some help to you. Great to have another hgv tech this side of the pond to share stuff with. Keep them coming...I Have a load of saved files for case studies, its just getting the time to write them up like you have, and remembering to take pics :D
by carl456
Sun Dec 15, 2019 5:27 pm
Forum: Case studies
Topic: Volvo FMX V4 Euro6
Replies: 12
Views: 23399

Re: Volvo FMX V4 Euro6

No problem Lee, hope it helps. I'm sure you are aware of the camshaft issue on these too. I haven't proved it yet as I didn't scope one with a shifted cam but i'm thinking you might be able to see a retarded or shifted cam shaft lobe on the pumping injectors with this method too by looking at pressu...
by carl456
Thu Dec 12, 2019 10:09 pm
Forum: Case studies
Topic: Volvo FMX V4 Euro6
Replies: 12
Views: 23399

Re: Volvo FMX V4 Euro6

Hi Sharpy, Hope you don't mind me chiming in on this one. The two codes you have both have TSB's for them, if you like I can email them to you for the future? The pressure drop spec is 25 seconds so 4 is definitely not good! The ePRV is in fact a pressure relief valve not the mentioned pressure regu...
by carl456
Tue Apr 02, 2019 6:50 pm
Forum: Introductions
Topic: Hello!
Replies: 2
Views: 3916

Hello!

Just bought a 4 channel picoscope. HGV mechanic by trade, cant wait to get to grips with it. Hopefully ill be able to upload some known good waveforms to the library, seems a bit thin on the ground for truck waveforms :D

Carl