surging fuel pressure
#1
surging fuel pressure
my 2000 24 valve has an air dog 150 on it with the 1/2 in fuel line kit, it has always surged between 11 and 20 psi. it doesn't surge as much when I am pulling a heavy load. I was just wondering if this is normal or do I have something wrong ? the lift pump went bad in aug of this year and they replaced it and the original inj pump went out before the lift and I replaced it . all of this made no difference in the way the fuel pressure surges.
thanks for any help
thanks for any help
#4
Could be the regulator in the AirDog, but there is also a regulator in the return line of the VP44. Likely not the issue, but doesn't hurt to pull it out and have a look to see if there is something out of place with it. They are in the ball park of $30, and doesn't hurt to change them every couple years. I think it should be part of routine maintenance rather than fix as fail.
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rrimpa (10-21-2013)
#7
see post number 2 I posted my pressures for idle/cruise/WOT already.
any input pressure over 14psi will keep the vp44 return valve open.
16 is the lowest pressure my truck ever sees unless my fuel filters are starting to get clogged then it might drop 1psi or so across the scale which tells me it is time to change the filters, so then I order up some more fleetguard filters off of amazon and replace them
any input pressure over 14psi will keep the vp44 return valve open.
16 is the lowest pressure my truck ever sees unless my fuel filters are starting to get clogged then it might drop 1psi or so across the scale which tells me it is time to change the filters, so then I order up some more fleetguard filters off of amazon and replace them
The following users liked this post:
rrimpa (10-24-2013)
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