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I have had this p0440 code on my 2000 eldorado esc for a while , amd i know i need to fix it . I have no pressure when i remove the gas cap . What are the possible problems , amd possible fixes for this code ?I can smell gas faintly towards the rear of the car and have been getting low mileage as well. Any ideas .?how can i figure out what needs to be fixed to make this code go away?
Recently someone backed into me and pushed my front bumper cover back a few inches and down one inch. I,have noticed that the cornering lights no longer sit flush and i want to take the bumper off and readjust it . I havent done this before and i have been trying to find a tutorial online . Does anyone know how i can achieve this so i can bend back the the mounts that hold my bumper cover . I just want to remove it so i can see what has been bent and hopefully once that has been readjusted the cornering lights will sit flush,and will no longer have a gap. Thanks
Ok, I have a theory. I have noticed on a few Northstars' now that there is more wear on the furthest lifters from the oil pump, I notice for instance that there is more lifter wear on the lifters on #6 and #8 cylinders. As we know, at idle the oil pressure can drop to below 10 psi, before the low oil pressure light comes on (around 6 psi). This pressure may be adequate for a Northstar when all clearances are within tolerance but as the engine ages, the clearances in the rod bearings, main bearings, cam bearings, lifter bore and oil pump can widen effectively lowering the oil pressure below the 10 psi. A search of the board here for the term "flickering oil light" will turn up a bunch of members complaining of "oil light flicker" at idle, including me in my 96 Deville. Heavier oils like Rotella 15W40 in the warmer months can help manage it. A thicker oil will increase the oil pressure as it will not flow through the widened clearances throughout the engine so easily, thereby increasing the oil pressure slightly to stop the light. But I can not help but feel that my oil pressure is hovering just above the oil light ON, threshold at idle when I solve the light that way. But, what is actually happening when the oil pressure is low to the point of the light coming on? I believe that points furthest from the oil pump will starve for oil first. I think the reason why I see wear in #6 and #8 is because its the last place the oil gets to on start ups especially when clearances are at or beyond their limit throughout the engine. I would like to increase the oil pressure throughout the engine. Is there a way to increase the oil pressure by increasing the tension on the pressure relief valve in the oil pump? I would like to increase the oil pressure throughout the engine by 5 to 10 psi. Shim? Stronger spring? Any ideas? Also, please post your experience with regard to observations of lifter wear. Do a comparison of the lifters in cylinders #1 and #3 verses the lifters in #5 and #7 and also do the same in #2 and #4 verses #6 and #8. See if you see increased wear between those two samples as I have been seeing and post your findings here. Thanks for your ideas.