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From : Annonymous

Q: on thu 06 jan 2005 110138 -0700 jim hall jdhall@nospammolaplateng.co wrote i replaced the batterys on my 97 turbo diesel last weekend. they were the original from-the-factory units so i expect after 170000 miles they were due for replacement. the truck wouldnt crank on a couple of cold mornings recently though although after i charged them up - everything seemed to work fine at least for another few weeks until the next time it wouldnt start. so the sears die-hard guy tells me i need an alternator replacement. he gives me this little printout of a test that indicates that the alternator has a bad waveform and needs replacement. his mechanic can do it later in the day with a napa alternator. i passed. from all indications i have the alternator is fine. the voltmeter fluctuates a but when cold - i presume due to the air heat grid - but after the engine warms it stays rock solid at slightly over 14 . just like it has always done. im inclined to think i dont have a problem. comments appreciated. tia. jim hall 520 exc 950 lc8 adventure turning money into noise... have you got a good dvm connect it to the battery with the engine running and the meter set to ac volts. step down to the lowest range - any reading over about 0.2 volts indicates a possible diode or stator problem ac ripple. this would show up as a bad waveform if that is ok connect an analog meter and with the engine idling tap the alternator. any fluctuation indicates worn brushes - which can also cause a bad waveform . 222 296067 vpvst0tvii7d1kovsft15opru7e7fl4umq@4ax.com id look at the gas cap again. i have a 01 ram got the same code at about 15000 miles took it into the dealer and was told that they saw alot of gas caps with bad o ring gaskets on them. you could not seal the system no matter how much you tighten the cap. they put a new one on my truck and have not had that type of problem with my truck since. bk on wed 05 jan 2005 042342 gmt us ourinfo@worldnet.att.net wrote thanks! i just went out and checked the gas cap. i couldnt tell for sure but it might have been loose. ill take it out for a drive tomorrow and see what happens. thanks again doug im out in the california desert for the winter and just got a obdii code of p0441. the site says evaporative emission control system incorrect purge flow. is this something to sweat or is it just from all the rain we have been having. we were hooking up and moving our trailer to get water when it came on. any help will be greatly appreciated. doug .