Ok need a little code advice P0171 & P0174
#21
If you have not touched the airbox prior to throwing the codes, again I would purchase a can of MAF cleaner and start there.
I hear you on the other vehicle.
Your welcome for the write ups. I hope they help. As you see i have been around our S Type once or twice....literally.
Last edited by joycesjag; 12-21-2012 at 11:36 AM.
#23
Good point, is the engine compensating the lean condition with more fuel? and if so is that amount of extra fuel enough to kill the catalyst?
The reason I ask is that I am in the process of replacing the ball joints, tie rods and ends with a new rack and control arms on our extra car. so I am looking at least a few days before I can get the Jaguar sorted out.
Thanks Joycesjag for the great write ups I have them all printed out on my desk!
The reason I ask is that I am in the process of replacing the ball joints, tie rods and ends with a new rack and control arms on our extra car. so I am looking at least a few days before I can get the Jaguar sorted out.
Thanks Joycesjag for the great write ups I have them all printed out on my desk!
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devo357 (12-21-2012)
#24
It doesn't have to be exactly 2500. The point is to have lots more air flow so that any leak is likely then to be a smallish part and you can compare with the idle figure when a leak will make a relatively large impact. If you don't see quite different trims you almost for sure don't have an air leak, or at least not a typical one.
The fancy tool can track trims at various rpms but you can do it by hand.
If you appear to have an air leak, some cautious spraying of propane at idle will make the trims move almost instantly (and you may hear the engine note change).
Last edited by JagV8; 12-21-2012 at 12:25 PM.
#25
The codes flag when the extra fuel it's having to add is rather a lot (over 25%)!
Really it's a good idea to have a look at trims every now and then as even 10% is a real worry.
BTW, misfires often trigger lean codes (think and you should see why).
Last edited by JagV8; 12-21-2012 at 12:31 PM.
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devo357 (12-24-2012)
#26
#27
#28
RICK
LTFT was good wish I would have checked it first! that was really good advice. What a friggin hassle this has been I hate chasing down vac leaks!!!!!!!!!!!!!!! now off to get the truck done need it tomorrow.
Thanks to everyone that chimed in!
Dean
LTFT was good wish I would have checked it first! that was really good advice. What a friggin hassle this has been I hate chasing down vac leaks!!!!!!!!!!!!!!! now off to get the truck done need it tomorrow.
Thanks to everyone that chimed in!
Dean
Last edited by devo357; 12-23-2012 at 10:13 AM.
#29
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