Fuel system day
Posted: Wed Jan 04, 2006 8:23 pm
Well I spent the afternoon working on the fuel system.
First thing I did was swap out the fuel sender that was on the 92 turbo pump assembly to the one that was on the 90 n/a pump assembly. The contacts are bigger, and I think measure more accurately. The turbo one would fluctuate up and down a bit mre then I was used to, especially when the tank was low.
I noticed some particles on the sock when I pulled the pump out. I don't think the inside of my tank is that clean.
Next, I tested fuel system pressure. I got 30 psig at idle with the vacuum hose connected to the regulator. I got 40 psig at idle with the vacuum hose disconnected from the regulator.
After running the car for a few minutes and going back to the fuel pump connector, I noticed it was warm. I know there's been discussion about the connector and replacing it. I did some testing on the ground lead, and found it was showing about 47 ohms between it, and a good ground. Sometimes it would show 0 ohms. So I think the wire had degraded over time. I wired up a new ground wire and rewired the power and ground pins to separate connectors. I left the level sender wiring alone.
If I hadn't had disconnected the fuel pressure gauge, I would've tested the pressures again to see if they changed, but I didn't feel like hooking everything up again.
As for any change....I didn't notice anything, but I feel better knowing the pump has a better ground.
I also changed the fuel filter, but that's not a biggy.
here's pics
http://www.main.experiencetherave.com:8 ... s/fuelsys/
First thing I did was swap out the fuel sender that was on the 92 turbo pump assembly to the one that was on the 90 n/a pump assembly. The contacts are bigger, and I think measure more accurately. The turbo one would fluctuate up and down a bit mre then I was used to, especially when the tank was low.
I noticed some particles on the sock when I pulled the pump out. I don't think the inside of my tank is that clean.
Next, I tested fuel system pressure. I got 30 psig at idle with the vacuum hose connected to the regulator. I got 40 psig at idle with the vacuum hose disconnected from the regulator.
After running the car for a few minutes and going back to the fuel pump connector, I noticed it was warm. I know there's been discussion about the connector and replacing it. I did some testing on the ground lead, and found it was showing about 47 ohms between it, and a good ground. Sometimes it would show 0 ohms. So I think the wire had degraded over time. I wired up a new ground wire and rewired the power and ground pins to separate connectors. I left the level sender wiring alone.
If I hadn't had disconnected the fuel pressure gauge, I would've tested the pressures again to see if they changed, but I didn't feel like hooking everything up again.
As for any change....I didn't notice anything, but I feel better knowing the pump has a better ground.
I also changed the fuel filter, but that's not a biggy.
here's pics
http://www.main.experiencetherave.com:8 ... s/fuelsys/