You can do it your self though. This is only the first time that I put gas on the truck ever since I bought it. Took the Altima for a long drive about 80 miles , and P1491 is. The line that was plugged solid with rust was a hose coming from bypass valve that split off to a hard line that was routed through wheel well looks like a brake line. If you wish to post a reply to this topic you must first If you are not already registered you must first Forum Jump You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum Sponsors Powered by version 7. Find our more about a or get! When is the code detected? The vacuum cut valve is then bypassed to apply intake manifold vacuum to the fuel tank. The vacuum cut valve is then bypassed to apply intake manifold vacuum to the fuel tank.
On my 2002, it is located against a rear wall, opposite the fuel filter. You might check all the vacuum lines to be sure they are all connected. It is in an awkward place and Nissan charges about a 100. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere! You may have to check the top of the tank where the fuel pump gasket is, as well as the vent lines to the front of the car. A valve is located in the head of an engine and is operated by the crank shaft and rockers to let air into he piston during the intake stroke and to vent air out of the piston during the exhaust storke. I'll call the dealer tomorrow morning. I couldn't really see above the ledge, but I noticed two rubber hoses around it that were not connected to anything, so I figured that must be the problem.
The vacuum cut valve bypass valve responds to signals from the. The valves in the veins prevent backflow in these vessels. Is it possible the Saturn dealer we bought it from did not fix the recall? Two similar codes exist for this system: P1490 and P1491. The Intake valve closes at the bottom of the piston stroke then the piston moves up compressing the air and fuel compression stroke. It could be something as simple as a clogged hose.
It's often a guessing game to figure out which part is worn and causing the problem. If you have one adjustment screw, it will control your vertical aim. The line itself looked brand new on the outside but again was plugged solid from rusting inside out. The vacuum cut valve bypass valve is energized opened for diagnostic purposes to bypass the vacuum cut valve to apply the intake manifold vacuum to the fuel tank. If you haven't thrown your old one away I would definitely check it.
If you want to depressurize the fuel system you can remove the fuse from the fuse panel that powers the electric fuel pump and then just run the car until … it stalls. Hydraulic lifters will rattle a little when the engine first starts if the oil has leaked out. I shook it to test for broken charcoal a common issue on these cars , and felt no loose particles. I decided to begin with the canister. After some research, however, I discovered that the vacuum cut valve goes in between the four hoses, and that it was entirely missing from my vehicle.
Typically that doesn't take too long to go away. The vacuum cut valve bypass valve is located on the same metal bracket as the vacuum cut valve. Specifically the testing and replacement of the vacuum cut valve bypass valve. The vacuum cut valve prevents the intake manifold vacuum from being applied to the fuel tank. A worn piston will leave too much clearance at the bottom of the cylinder, allowing the piston to slap back and forth when it's running. The vacuum cut valve bypass valve responds to signals from the Engine Control Module.
A valve is a device that regulates the flow of a fluid gases, liquids, fluidized solids, or slu … rries by opening, closing, or partially obstructing various passageways. Hey Joe, Sorry to hear that it didn't go as smooth as planned and that it didn't solve your code. This verifies the intake manifold vacuum. A lock gate on a canal is a valve, in this case to alter the height. There were two other hose ends dangling nearby, so I naively thought I could just connect these hoses together. If any blockage is found, determine the cause and repair as necessary.
I found a picture on ebay for one of these parts for a Maxima. If your charcoal has broken up, catching it early on may prevent the stuff from getting sucked into the system, clogging your hoses and solenoids. The exaust valve then opens and the piston moves back up forcing out the exhaust exhaust stroke. That is the vacuum cut valve. Valves are technically pipe fittings, but are usually discussed as a separate category.