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Having an issue with overheating my fuel after prolonged idle. I can drive the car no problems, but twice now (after long periods idling), i notice the fuel pressure start to drop from 40 to 35 to 30 to 25, etc. One time it actually killed the car, the other it just started to lean it out. If I let the car sit for 5 minutes fuel pressure goes right back to normal. I thought it was a dirty pre-filter, and there was a lot of crud in the pre-filter, but cleaning it did not seem to fix the issue.
System is as follows:
8 gallon cell
-12 to 85micron filter
pump
-10 40 micron filter
-10 to -8 y block under hood
-8 to each rail
-8 from each rail to reg
-8 from reg to fuel cell
Now, a couple of issues I see currently (trying to get a grasp on what, if any/all, should be addressed first).
1- small fuel cell, 8 gallons means less fuel volume to dissipate heat, pump moves over 3 gallons per min, thus it is flipping the tank A LOT
2- 40 micron post-pump filter. not sure how this one slid through the cracks, but i looked at my parts sheet and that is what I am using some how. aeromotive calls for a 10 micron. not sure if this could introduce enough restriction though (hell, it's been fine for over a year and 2500 miles). figure it needs to be changed anyway so i'll buy a 10 micron
3- no turbo blanket and lots of under hood heat. not sure if it'd make that much of a difference, but with no turbo blanket + a/c it gets hot under there. figure the fuel is picking up a decent amount of that ambient heat.
4- no pump speed controller, this is by advice given to me as these can fail you at the WRONG time and cost a motor (plus they are expensive).
5- very slight leak in suction line (right at the cell where the -12 bulk head comes through), it is VERY slight, like just enough to attract dirt on the sump of the cell. i have replaced the seal at the bulk head but it still has this very slight leak. could this be constantly aerating the fuel causing cavitation in the pump?
System is as follows:
8 gallon cell
-12 to 85micron filter
pump
-10 40 micron filter
-10 to -8 y block under hood
-8 to each rail
-8 from each rail to reg
-8 from reg to fuel cell
Now, a couple of issues I see currently (trying to get a grasp on what, if any/all, should be addressed first).
1- small fuel cell, 8 gallons means less fuel volume to dissipate heat, pump moves over 3 gallons per min, thus it is flipping the tank A LOT
2- 40 micron post-pump filter. not sure how this one slid through the cracks, but i looked at my parts sheet and that is what I am using some how. aeromotive calls for a 10 micron. not sure if this could introduce enough restriction though (hell, it's been fine for over a year and 2500 miles). figure it needs to be changed anyway so i'll buy a 10 micron
3- no turbo blanket and lots of under hood heat. not sure if it'd make that much of a difference, but with no turbo blanket + a/c it gets hot under there. figure the fuel is picking up a decent amount of that ambient heat.
4- no pump speed controller, this is by advice given to me as these can fail you at the WRONG time and cost a motor (plus they are expensive).
5- very slight leak in suction line (right at the cell where the -12 bulk head comes through), it is VERY slight, like just enough to attract dirt on the sump of the cell. i have replaced the seal at the bulk head but it still has this very slight leak. could this be constantly aerating the fuel causing cavitation in the pump?
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