2006 Jeep Commander with P1404 EGR performance code. Is it a bad EGR valve? Part 2 is HERE: • Jeep P1404 EGR code- S... Also visit my website www.schrodingersboxQM.com and download the book mentioned!
The scantool live data that stood out to me was the 5.0V reading for the position of the EGR valve. It seems to me any position (potentiometer reading) sensor should be .5v to 4.5v and not read the source voltage. From there I would have checked power and ground at the sensor and then checked the valve for problems.
Yes correct. You won’t see a potentiometer show the full reference voltage or complete absence of voltage. In this case clearly the potentiometer itself was faulty but of course usually it’s a circuit fault.
Actually, the fuel trims make sense right? The PCM thinks its commanding the EGR, adding a known amount of exhaust back into the intake, which it would have to control for with the injection (LT fueltrim). But it's not actually getting that flow, so it corrects for it (ST fueltrim). Or am i dead wrong? :) Guess I'll find out in part2 if its actually blocked. Also, can you recommend one of those bi-directional scaltools that are DIY affordable? I'm seeing a lot of unknown brands and I'm sure a ton of them are garbage.
Oh by far and away that best best way to do it!!! Far and away. Might help to start with the “basic electrical for beginners” series. Also here on RU-vid I have “secret of engine diagnostics: fuel trims” which helps understand how I verified the repair.
When you upgrade your intro you'd please me to remove the catvin pain screams to be replaced with a cat's heavy purr... I get the need for a cat but being a cat lover I cringe in pain to hear that cat in your intro...
Enjoy your evening with all your family around you,Schrodingers Box My mentor 👍 WHIP SMART,Schrodingers box From Nick Ayivor from London England UK 🇬🇧 ⏰️ 3.03AM Good Night 😴 🥱 🌃 🌙
“Who have”. Not “with”. The way you say it, the insinuation is that I have learning or speech difficulties that I leverage for mocking people which is totally untrue.
“Who have”. Not “with”. The way you say it, the insinuation is that I have learning or speech difficulties that I leverage for mocking people which is totally untrue.
Hahahaha I do get asked this daily especially from European viewers. There are so few diesels here where I am. I know nothing about diesels and it would be a disaster. I tried one time a few years ago to diagnose I check engine light on a diesel and I concluded it must have had a bad MAP sensor because it wasn’t measuring engine vacuum at idle. It wasn’t until I got the same reading that I researched and learned diesels don’t have vacuum hahahaha.
@@SchrodingersBox That's not universally true. Some (especially more modern, but some as old as 80s) diesel engines have throttle valves, but they don't necessarily work in the same way (or with the same intention) as in gasoline engines. But even some gasoline engines don't necessarily have manifold vacuum, for example some BMWs have a throttle valve but it tends to be wide open because the amount of air getting into the combustion chamber is controlled by the VANOS system.
