I wish that the problem, if you can call it that, was not so intermittent that it only happened that one time. I have a list of things advised here to try but may not know which one thing might have fixed the 1 time problem.
2002 TB 4.2 died at stop & immediate restart
- Thread starter movietvet
- Start date
I feel, after this much time has gone by, that I need to update the members here about this very very intermittent one time issue with my girl's TB. I have driven the vehicle and she continues to drive the vehicle and there has not been a repeat of the listed problem. I have ran fuel pressure tests and checked all connections I can think of. I still want to check the grounds that @TJBaker57 shared with me. I have also attached my Foxwell scanner and found no history that points to any problems. No misfire history at all. I did find some oil seepage stain from the valve cover gasket, we add no oil between changes, so I plan to replace that seal and then get a very good look at those grounds I mentioned. I am also considering throwing cam and crank sensors at it as well. I do remember that when I did the spark plugs on it, right after purchase a year ago, I found 2 of the 6 ignition coil assemblies had been replaced and found no history for that in the CarFax report. We have now owned the TB for almost 1 year. Thanks for all input here.
Mooseman
Moderator
If you do replace the crank sensor, be aware that you will need a CASE relearn if your Foxwell is capable of doing it.
The Quality (and corruption) of the Fuel in the Tank cannot be discounted. The Worst Days to "Fill Up The Tank" at any Gas Station are always when one can see the presence of the Giant Tankers arriving to replenish the underground Fuel Tanks at such places. When the Suppliers are pumping in the New Fuel... they often manage to stir up enough turbulence to disturb the Residual Water Condensate, Dirt and Debris that will invariably either form up, collect and settle down within the Large Tanks... and this agitated Junk from the bottom of the Tank(s) may manage to pass through their overworked filtration systems.
This Stuff may wind up inside of the Average Gas Tanks... and bring in problems along with the New Fuel. Coupled with this is the presence of the addition of Ethanol that might accidentally wind up getting pumped into a Regular Gas Tank (See Post #47 Image) ...by an occasional accident of a Bad Choice of Pumps. A thoughtful discussion with "The Lil' Woman" might reveal such an incident if she also adds Fuel in The Tank from time to time... :>)
Most Fuel Stations alert people to expect this with a not so subtle warning posted here and there at the Pumps. Regardless... The Favorite Fuel & Water Emulsifier of Choice...is Chevron Techron. Without going Crazy....an occasional Heavy Dose of this stuff will eliminate occasional *Fuel Stalls* that these events might cause. Used Judiciously...it can lead to having a more responsive Engine as the stuff passes through the EFIs and cleans a bit of the Junk collecting around the Pintles to help make the Engine have a Bit More PEP.
This Stuff may wind up inside of the Average Gas Tanks... and bring in problems along with the New Fuel. Coupled with this is the presence of the addition of Ethanol that might accidentally wind up getting pumped into a Regular Gas Tank (See Post #47 Image) ...by an occasional accident of a Bad Choice of Pumps. A thoughtful discussion with "The Lil' Woman" might reveal such an incident if she also adds Fuel in The Tank from time to time... :>)
Most Fuel Stations alert people to expect this with a not so subtle warning posted here and there at the Pumps. Regardless... The Favorite Fuel & Water Emulsifier of Choice...is Chevron Techron. Without going Crazy....an occasional Heavy Dose of this stuff will eliminate occasional *Fuel Stalls* that these events might cause. Used Judiciously...it can lead to having a more responsive Engine as the stuff passes through the EFIs and cleans a bit of the Junk collecting around the Pintles to help make the Engine have a Bit More PEP.
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She was up in Washington state at the time. I will ask her if she saw a truck at a station she was at. Thanks for the info.
No Problem... incidentally, the comment about the "accidental wrong fuel" was not meant for her in the pejorative sense... but rather meant for The Fuel Companies making such mistakes... as we have proof from what happened down here in Florida:
www.hngn.com
(Photo : CHANDAN KHANNA/AFP via Getty Images)
Florida Diesel Contamination Acknowledged by CITGO—Provides List of Affect Gas Stations
Florida's diesel contamination acknowledged by CITGO. The fuel refiner provided the list of affected gas stations.
www.hngn.com
(Photo : CHANDAN KHANNA/AFP via Getty Images)
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Today my girl was going out to run some errands. Said that about 1/2 mile from home the CEL came on and still ran fine and no dying. She called me as she got home and told me about CEL. I had her pull in under the driveway canopy and found code P0340 related to camshaft position sensor. Was starting and running fine. I cleared the code and took on a road test. No problems and no CEL. Ordered an AC Delco 213-1557 sensor. ACD calls it a Synchronizer. Anyway, with my military discount at AZ the cost is $49. $55.79 at RA plus shipping. $130 at the dealer. AZ had to order in from their warehouse and will get in the morning. If ice storm rolls in, like the weather report says, I will get it when I can. Very simple 5 minute install.
The stall problem this thread was started for, has never happened again BUT maybe a cam sensor fixes that concern.
The stall problem this thread was started for, has never happened again BUT maybe a cam sensor fixes that concern.
It has been over a decade since Drew performed this P0340 Diagnostic Step By Step Video...but such things NEVER lose their Value in Sound Automotive Diagnostics and go beyond the typical "How To R&R the CMP (Camshaft Position Sensor)" by using his Tech 2 and a Lab-Scope for the Diagnosis:
Here Again... "The Car Doctor" does EXACTLY the Same Diagnostic Approach using his Snap-On Verus Oscilloscope as the ONLY means of identifying and capturing such a "TRANSIENT FUBAR" by knowing what a KNOWN GOOD CMP Wave Form Looks Like:
...against What Happens when the *ABSOLUTE CAMSHAFT POSITION* SIGNAL Glitches Out:
The CMP (Camshaft Position Sensor) take its Readings as Hall Effect Square Wave Impulses (Three 'Skinny' and Three 'Fat') from the Six Reluctor Wheel Notches in the Outer Orbit of the Camshaft Phaser. This signal is NOT the same action taken by the CPAS, which is strictly meant for adjusting the Exhaust Camshaft in between 0-25 Degrees at varied RPM and Torque Demands using Engine Oil Pressure and also acting like an EGR at near Idle Engine Speed. As mentioned above in Post #49, the ACDelco OEM item shown below is the recommended replacement part:
This CMP Signal is compared inside the PCM with A/C Sine Waves getting picked up at the CKP (Crankshaft Position Sensor) in the Lower Engine Block in order to know precisely when to allow the EFIs to Spray in Fuel and when to allow the COPs (Coil Over Plugs) to Fire Off the Ignition Spark... JUST BTDC (Before Top Dead Center).
comme ça ...
When it comes to Unexplained Engine Stalls, a Problem Timing Chain can also Raise its Ugly Head as being a Possible Cause due to Worn Timing Chain Guides, a Stretched Timing Chain or having a Fully Extended, Unresponsive Timing Chain Tensioner.
Here Again... "The Car Doctor" does EXACTLY the Same Diagnostic Approach using his Snap-On Verus Oscilloscope as the ONLY means of identifying and capturing such a "TRANSIENT FUBAR" by knowing what a KNOWN GOOD CMP Wave Form Looks Like:
...against What Happens when the *ABSOLUTE CAMSHAFT POSITION* SIGNAL Glitches Out:
The CMP (Camshaft Position Sensor) take its Readings as Hall Effect Square Wave Impulses (Three 'Skinny' and Three 'Fat') from the Six Reluctor Wheel Notches in the Outer Orbit of the Camshaft Phaser. This signal is NOT the same action taken by the CPAS, which is strictly meant for adjusting the Exhaust Camshaft in between 0-25 Degrees at varied RPM and Torque Demands using Engine Oil Pressure and also acting like an EGR at near Idle Engine Speed. As mentioned above in Post #49, the ACDelco OEM item shown below is the recommended replacement part:
This CMP Signal is compared inside the PCM with A/C Sine Waves getting picked up at the CKP (Crankshaft Position Sensor) in the Lower Engine Block in order to know precisely when to allow the EFIs to Spray in Fuel and when to allow the COPs (Coil Over Plugs) to Fire Off the Ignition Spark... JUST BTDC (Before Top Dead Center).
comme ça ...
When it comes to Unexplained Engine Stalls, a Problem Timing Chain can also Raise its Ugly Head as being a Possible Cause due to Worn Timing Chain Guides, a Stretched Timing Chain or having a Fully Extended, Unresponsive Timing Chain Tensioner.
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I just want to let members know that I have not forgotten about this cam sensor replacement. I ordered an ACD part, 213-1557, from Auto Zone and then the ice storm came in and the part has not been delivered from their HUB in Portland, Oregon down to Eugene, Oregon. They hope to get a delivery today or tomorrow and then I can install it and take pics and post here.
Ok, so I replaced the cam sensor today. Finally got the AC Delco/Genuine GM part in at AZ. It literally took all of 5 minutes to replace. I did find something interesting though. The attaching/hold down 10mm bolt was loose and backed out a bit and when I found that, I pushed on the cam sensor and it moved closer to head and bottomed out. There was no oil leak because the o-ring was still sealing in the hole/cylinder. So, it must have been floating at times. I wonder if the closeness to cam variance was enough to cause a CEL and the one time dying at idle at a stoplight? Here are the pics:
