IP Pump questions again
#1
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IP Pump questions again
Ok so three weeks ago about 1500 km's I replaced the IP in my 01 24V, and WOT on the highway it would drop to around 11 or 12, well this morning I saw it drop as I left the farm to under 10.
It was cold mind you close to freezing, it was at 2 degrees Celsius or about 35F.
Can the cold make this kind of difference, to fuel pressure, or do I have a brand new IP going out again.
It was cold mind you close to freezing, it was at 2 degrees Celsius or about 35F.
Can the cold make this kind of difference, to fuel pressure, or do I have a brand new IP going out again.
#2
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I think you're referring to your "lift pump" or transfer pump. Your injection pump makes a wee bit more than 12 lbs. If this is your case, I doubt 35 degrees would cause your pressure to lower. I'd keep an eye on it. It's not uncommon to see a new pump quickly fail after installation or even be DOA.
#5
My truck seems to create a vaccume in the tank so when I am on long road trips my pressure will drop from 13 to as low as 9 pounds until I stop and fuel up or at least release the fuel cap. You can hear the vaccume seal when you open the cap.
#6
My LP pressure is 1 to 1.5 psi lower cold until the fuel warms up too. I thought my lift pump was wearing through the winter but as the weather warmed up, my LP pressure returned.
#7
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Originally Posted by 99 cummins
My truck seems to create a vaccume in the tank so when I am on long road trips my pressure will drop from 13 to as low as 9 pounds until I stop and fuel up or at least release the fuel cap. You can hear the vaccume seal when you open the cap.
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#8
I clean this vent opening periodically. I can tell when it's clogged because after I shut the truck off you can hear it whistle for a long time. I crawl under there and stick a nail through it. But even after I do that i still have the vaccume when I release the fuel cap.
#9
That kinda makes me wonder if a bee built a nest in it or not. The vent is supposed to vent your tank. Maybe if you gave it a quick shot of carburetor cleaner w/little red plastic line...use some goggles or a face shield, that stuff goes straight for my eyes every time I use it. It'll even go for my eyes if someone else uses it.
#10
I thought about just making the hole a little bigger, but I'm afraid of what may get into the tank. Keep in mind that this is a farm use truck. With as dry as it's been for a long time now it sees alot of dust and driving through the weeds. I use a pair of panty hose over my air filter as a pre-filter other wise it's due for a cleaning every few months. With this I just brush off the big stuff and truck on.
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