Weird Fuel Pressure Readings
#1
Weird Fuel Pressure Readings
Last week I had the time to reinstall the Walbro fuel pump. I'm still using the stock injectors btw. With the stock Vortech fmu still in place my pressure read 32psi @ idle which is the same as stock. I then switched out the recalibration disk and now my pressure is at 40psi @ idle. When I'm doing normal driving I'd see it go to 42psi. After a hwy drive I noticed that the pressure dropped down to 38psi @ idle and then later on back down to 32psi. What's up with that? Starting up first thing in the morning I'd see 40psi.
Now when I reinstalled the Walbro I just reused the original hose clamp instead of the screwdriver/band clamp. Would that be the cause of the problem?
Now when I reinstalled the Walbro I just reused the original hose clamp instead of the screwdriver/band clamp. Would that be the cause of the problem?
#3
Originally Posted by C MAX
where are you taking readings, before or after the fmu.
#4
Originally Posted by BlackCat
Good question. I can't remember how I positioned the pressure sensor so I'll have to take a look and come back here later.
#6
Ok, thanks! I do plan to take out the Vortech fmu as soon as a free weekend comes up anyways so I'll put up with the weird gauge readings a little while longer. The pressure sensor will be mounted on the Aeromotive fpr.
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aminus21
4th Generation Classifieds (1995-1999)
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09-12-2015 04:53 PM