Search found 12 matches

by RyanH
Sat Apr 10, 2021 9:37 pm
Forum: Diagnostic discussion
Topic: One waveform One picture
Replies: 27
Views: 11124

Re: One waveform One picture

After a decade of using a Picoscope at work, I find that I have fallen into a bit of a trap. On late model vehicles, scan data and the PCM's ability to identify a fault has greatly improved. I have realized that I am relying on my scan tool more and not pushing myself to scope newer vehicles. This i...
by RyanH
Mon Mar 01, 2021 4:56 pm
Forum: Heavy Duty and Off Highway
Topic: Navistar VT365/VT275 and Ford 6.0L Injector
Replies: 6
Views: 4276

Re: Navistar VT365/VT275 and Ford 6.0L Injector

That's awesome Ben!

I have never had the chance to test a C7 or C9 Cat but even though these engines are quite old in regards to on highway vehicles, they are in a lot of equipment still running today.
by RyanH
Sat Jan 23, 2021 6:46 am
Forum: Heavy Duty and Off Highway
Topic: CAT C7 ACERT HEUI Engine
Replies: 3
Views: 3329

Re: CAT C7 ACERT HEUI Engine

I feel that you are on the right track with the fuel supply. It might be worth checking for a restriction before the supply pump as well.
by RyanH
Sat Jan 09, 2021 7:55 pm
Forum: Best of the web
Topic: Bosch CP3 Test
Replies: 0
Views: 3591

Bosch CP3 Test

The last half of this video gets into scoping a CP3 pump for a low power issue in a Duramax but is universal to most common rail systems.

https://youtu.be/5qtvmio0DHw
by RyanH
Wed Dec 30, 2020 7:40 am
Forum: Heavy Duty and Off Highway
Topic: Navistar VT365/VT275 and Ford 6.0L Injector
Replies: 6
Views: 4276

Re: Navistar VT365/VT275 and Ford 6.0L Injector

I haven't played around much with the CAT HEUI systems besides one 3126E. On that engine the supply was was a constant voltage. I imagine the low side was in charge of the current limiting but I didn't get the chance to capture it. The Navistar G2.8 injectors share a supply between four injectors bu...
by RyanH
Thu Dec 24, 2020 9:33 pm
Forum: Heavy Duty and Off Highway
Topic: Navistar VT365/VT275 and Ford 6.0L Injector
Replies: 6
Views: 4276

Navistar VT365/VT275 and Ford 6.0L Injector

The G2.8 injector in these engines are a Hydraulic Electronic Unit Injector (HEUI) and are susceptible to poor engine oil causing injector damage, resulting in a misfire. The damage is usually scoring of the spool valve that sits between an open and close coil controlled by an Injection Control Modu...
by RyanH
Sun Apr 02, 2017 5:33 am
Forum: Diagnostic discussion
Topic: Monitoring coolant pressure with a sensor
Replies: 13
Views: 21243

Re: Monitoring coolant pressure with a sensor

Generally, these engine doesn't develop a misfire on one cylinder due to a head gasket issue. I was just posting one with an over pressurizing system. Now with an EGR cooler things get a bit tricky. Here is a post of one that is venting but the cause is an oil cooler restricting coolant flow to the ...
by RyanH
Sat Apr 01, 2017 6:22 am
Forum: Diagnostic discussion
Topic: Monitoring coolant pressure with a sensor
Replies: 13
Views: 21243

Re: Monitoring coolant pressure with a sensor

Here is a capture of a 2004 Ford F-350 with a 6.0L Diesel with the common stretched head bolt issue these engine develop with a performance tune. Many of these will only show up when towing a heavy load for the customer. Coolant will vent from the degas bottle but most of the time they have no compl...
by RyanH
Fri Mar 31, 2017 6:46 am
Forum: Diagnostic discussion
Topic: Toyota Denso Piezo Injector wave forms
Replies: 8
Views: 8092

Re: Toyota Denso Piezo Injector wave forms

The piezo stack in an injector is more of a capacitor than a coil. A resistance test does not give an accurate reading for these injectors. The capacitance of an injector does change over it's lifetime. Siemens and Bosch both compensate for this change by varying the voltage to the injector. I am no...
by RyanH
Sun Jul 27, 2014 4:52 pm
Forum: Diagnostic discussion
Topic: 2004 Sprinter Limp Mode
Replies: 2
Views: 3790

Re: 2004 Sprinter Limp Mode

Hi there The DTC P2030 are related to the intake pressure sensor circuit according to my informations. You should check the basic specifications on this sensor - that is the circuit from the ECU to the intake pressure sensor. :wink: Regards Kim Interesting, this code comes up as an O2 sensor issue ...