Logan Posted July 28, 2004 Report Share Posted July 28, 2004 2001 Deville. Last couple of days have had a hard PO300 show up 2 times. One time with flashing SES warning of cat damage...hmmmm Tried the Tech2 today. No miss today....but.....over a 20 mile drive #6 is showing some kind of issue. These misfires could not be felt...but the Tech2 is showing something is amiss with #6. Great tool. Try that with the on board diagnostics. Logan Diagnostic LLC www.airbagcrash.com www.logandieselusa.com www.ledfix.com www.ledfix.com/yukontaillightrepair.html www.ledfix.com/ledreplacements.html www.ledfix.com/j42385toolrental.html Link to comment Share on other sites More sharing options...
CaddyShack24 Posted July 28, 2004 Report Share Posted July 28, 2004 Just rub it in. Rub it in gooood. Pretty cool though. Wishing i had one. Link to comment Share on other sites More sharing options...
JohnnyG Posted July 29, 2004 Report Share Posted July 29, 2004 Too bad the dealerships will never take the time to learn how to use it properly. But, just in case they do, how exactly does the Tech2 determine that there was a missfire event? And on one cylinder yet! Never underestimate the amount of a persons greed. Link to comment Share on other sites More sharing options...
Logan Posted July 29, 2004 Author Report Share Posted July 29, 2004 Just got back from the store with a couple of new plugs. I hope its a plug issue and not a coil module issue. The 2001 does not use plug wires....it uses a rather large and $$$ 400 dollar coil module. Anyway, the PCM can 'see' the crank slow down if there is a misfire. And set a PO300 misfire code. Logan Diagnostic LLC www.airbagcrash.com www.logandieselusa.com www.ledfix.com www.ledfix.com/yukontaillightrepair.html www.ledfix.com/ledreplacements.html www.ledfix.com/j42385toolrental.html Link to comment Share on other sites More sharing options...
Bill K Posted July 29, 2004 Report Share Posted July 29, 2004 It's probably trying to tell you it doesnt like being a DTS. You know how those computerised engines are...... Link to comment Share on other sites More sharing options...
shiden_kai Posted July 29, 2004 Report Share Posted July 29, 2004 Too bad the dealerships will never take the time to learn how to use it properly. But, just in case they do, how exactly does the Tech2 determine that there was a missfire event? And on one cylinder yet! Huh? I think that dealership technicians are quite capable of using the Tech 2. We only have to use it all day long every day, depending on what area you work in. I don't use it as much as the driveability guys, but we still have to be fairly familiar with it. Using the misfire graph is pretty basic stuff. Ian Link to comment Share on other sites More sharing options...
Logan Posted July 29, 2004 Author Report Share Posted July 29, 2004 Hmmm...just changed #6 plug. NPF. Looks like a coil board issue. Oh well...pretty good idea whats going on. Hope I can find one on eBay. They are $400. Logan Diagnostic LLC www.airbagcrash.com www.logandieselusa.com www.ledfix.com www.ledfix.com/yukontaillightrepair.html www.ledfix.com/ledreplacements.html www.ledfix.com/j42385toolrental.html Link to comment Share on other sites More sharing options...
Logan Posted July 29, 2004 Author Report Share Posted July 29, 2004 As for PO300. This code comes up all the time......maybe the # code with OBDII. Heres the tech.. The powertrain control module (PCM) uses information from the crankshaft position (CKP) sensors and the camshaft (CMP) sensor in order to determine when an engine misfire is occurring. By monitoring variations in the crankshaft rotation speed for each cylinder, the PCM is able to detect individual misfire events. A misfire rate that is high enough can cause three-way catalytic converter damage. The malfunction indicator lamp (MIL) will flash ON and OFF when the conditions for catalytic converter damage are present. Logan Diagnostic LLC www.airbagcrash.com www.logandieselusa.com www.ledfix.com www.ledfix.com/yukontaillightrepair.html www.ledfix.com/ledreplacements.html www.ledfix.com/j42385toolrental.html Link to comment Share on other sites More sharing options...
Logan Posted July 29, 2004 Author Report Share Posted July 29, 2004 That should say.....perhaps the #1 code with ODBII. PO300 is the most common code with GM cars. Logan Diagnostic LLC www.airbagcrash.com www.logandieselusa.com www.ledfix.com www.ledfix.com/yukontaillightrepair.html www.ledfix.com/ledreplacements.html www.ledfix.com/j42385toolrental.html Link to comment Share on other sites More sharing options...
JohnnyG Posted July 30, 2004 Report Share Posted July 30, 2004 Huh? I think that dealership technicians are quite capable of using the Tech 2. We only have to use it all day long every day, depending on what area you work in. I don't use it as much as the driveability guys, but we still have to be fairly familiar with it. Using the misfire graph is pretty basic stuff. I knew I could count on at least one comment from a mech. I just hear the horror stories and see what some of the dealerships are capable of, and it leads me to think that a Tech 2 is a little beyond the grasp of most mechanics. As you have said before though, it's all about making book. If this gizmo is going to help, you're all for it. Please don't take this personally, I'm sure you are a fine mechanic, genuinely concerned with customer satisfaction and taking a great deal of personal pride in your work. It took about 3 years for all of the grease and dirt to finally work it's way out of the skin on my fingers. I NEVER have gone to a dealership for anything outside of warranty work (which was screwed up) so I can't be considered a judge by any means. It is sorta like giving Caddy's a bad rap because everything we read here is the result of some type of problem. That makes me guilty of stereotyping, for which I apologize. Thanks for the "tech" on this gizmo Logan, I would have never guessed. Just goes to show the amount of thought that goes in to making a great car. Never underestimate the amount of a persons greed. Link to comment Share on other sites More sharing options...
bigfoo Posted July 30, 2004 Report Share Posted July 30, 2004 Unfortunately the misfire codes only show up if there are enough misfires to affect the emissions system. I wish it would give a code even if there were a little teeny bit of misfires :/ I need to get that software for the computer that emulates the tech2 and much less expensive too Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.