Moderator: volvite
both of my R51s had the same symptoms when the OEM battery needed replacementsmj999smj wrote:It's not typical of a battery or loose/corroded cables if it has plenty of cranking power. I would have it checked for trouble codes, first. If there is over 105,000 miles on her and she has the original spark plugs, now would be the time to replace them. Make sure you stick with NGK plugs, preferably the Laser Platinums or OE Laser Iridiums. I have heard of similar problems due to one or more bad cam position sensors or crank position sensor. Ideally, one would need to duplicate the no-start and check for spark and proper fuel pressure.
adaco wrote:(I originally posted this under the wrong (R52) category)
From time to time, my 2008 LE, won't start. It turns over fine, lots of cranking power, but won't start. After 4 or 5 attempts, it fires up fine. The problem may not occur for several weeks, then out of the blue, it occurs again. No fault codes have shown up. After it first occurred, I installed a new, battery (although turnover cranking was not an issue). The problem remains.
In all other respects, the vehicle starts, idles and runs perfectly. The problem is that I never know when this "non-start" will appear, or, whether the next time, it will simply not start st all.
This is really frustrating because I can't use the vehicle for out of town travel, fishing trips, etc. for fear that it will pop up and leave ne stranded. And, of course, it has never occurred when the vehicle is with my mechsnic for its regular maintenance service.
If anyone has experienced this or has any suggestions as to areas to look at, iI would very much appreciate it. Not knowing just when it might occur again is a constant frustration.
Thanks
Barrie
Hi Barrie,adaco wrote:(I originally posted this under the wrong (R52) category)
From time to time, my 2008 LE, won't start. It turns over fine, lots of cranking power, but won't start. After 4 or 5 attempts, it fires up fine. The problem may not occur for several weeks, then out of the blue, it occurs again. No fault codes have shown up. After it first occurred, I installed a new, battery (although turnover cranking was not an issue). The problem remains.
In all other respects, the vehicle starts, idles and runs perfectly. The problem is that I never know when this "non-start" will appear, or, whether the next time, it will simply not start st all.
This is really frustrating because I can't use the vehicle for out of town travel, fishing trips, etc. for fear that it will pop up and leave ne stranded. And, of course, it has never occurred when the vehicle is with my mechsnic for its regular maintenance service.
If anyone has experienced this or has any suggestions as to areas to look at, iI would very much appreciate it. Not knowing just when it might occur again is a constant frustration.
Thanks
Barrie
In order to explain a problem, it has to be properly diagnosed and the problem isolated to the exact cause of the problem. Since I did not work on the vehicles and did not diagnose them, I cannot offer a better explanation. Theories are what they are in that they are just an educated guess. Replacing something and having it rectify a problem a problem doesn't mean the problem was found or diagnosed, just that the problem no longer exists...perhaps permanently or perhaps temporarily. Without going through the diagnostic steps to isolate the cause of the problem, one never really knows if the problem has been "fixed," we just hope that it is and the problem doesn't return.eieio wrote:can you offer a better explanation?smj999smj wrote:Well, I don't necessarily agree with the "theory," because if you have enough power to crank an engine, then you should have plenty to operate coil packs.
yep, and sometimes we overthink thingssmj999smj wrote:In order to explain a problem, it has to be properly diagnosed and the problem isolated to the exact cause of the problem. Since I did not work on the vehicles and did not diagnose them, I cannot offer a better explanation. Theories are what they are in that they are just an educated guess. Replacing something and having it rectify a problem a problem doesn't mean the problem was found or diagnosed, just that the problem no longer exists...perhaps permanently or perhaps temporarily. Without going through the diagnostic steps to isolate the cause of the problem, one never really knows if the problem has been "fixed," we just hope that it is and the problem doesn't return.eieio wrote:can you offer a better explanation?smj999smj wrote:Well, I don't necessarily agree with the "theory," because if you have enough power to crank an engine, then you should have plenty to operate coil packs.
smj999smj wrote:"Fuel pump"
Try this... Turn key to ACC. Let system prime (usually u can hear the fuel pump running). Turn off then back to ACC mode (where all dash lights illuminate) for 5 sec. Turn off do again. Total 5 times, (used this to test your 4-5 attempts) on the 6th try and start the engine.
I am betting it's your fuel pump if you have no trouble codes and you have cranking power.
Also make sure u have quality fuel in the tank ... More then a quarter tank.