Flucuating rpms and flucuating fuel pressure from airdog
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Flucuating rpms and flucuating fuel pressure from airdog
Question #1- When I first start my truck Ive noticed that the rpms have been flucuating between 750 and 850 is this normal for these trucks to do, but after the truck has been driven they seem to hold steady at around 850 or so I think. And they seem to do when the truck is in cool down mode is this something to be concern with or just normal. Question #2- Here lately Ive noticed that my fuel pressure has been bounceing around from 17 to 13 psi. Is this normal for the airdog to have flucuating fuel pressure or is it being caused from the impluses from the vp44
Thanks for any help and advice guys
Andrew
Thanks for any help and advice guys
Andrew
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It does fluctuate while the grid heaters are cycling but it also does when they arent cycling. Like last night when I was going to work I stop at the store on the way and the truck was up to operating temp but the rpm needle was "bobing" up and down. I had the attitude monitor set to show the rpms and they were fluctuating from about 820 to somewhere around 850. It just puzzles me about this cause u would think the rpms and the needle would hold steady and they do at times but theres other times they dont.
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mine used to "bob" also. it would do it when cold. after a good highway drive it wasn't noticeable. NOT THE HEATERS. i hit 160k and decide to do valve lash. i think i had 3 valves out of spec and another 6 that barely met the spec. afterward it stopped. only time the rpms move is if the ac compressor kicks or the grid heaters cycle
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blkjack (12-04-2009)
#7
mine used to "bob" also. it would do it when cold. after a good highway drive it wasn't noticeable. NOT THE HEATERS. i hit 160k and decide to do valve lash. i think i had 3 valves out of spec and another 6 that barely met the spec. afterward it stopped. only time the rpms move is if the ac compressor kicks or the grid heaters cycle
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