Time to check out a new book? On my 2002, it is located against a rear wall, opposite the fuel filter. The vacuum cut valve prevents the intake manifold vacuum from being applied to the fuel tank. I looked this up and found it to be a. After removing the ledge I discovered the vacuum cut valve bypass valve. Eventually I traced the hoses upward to the vacuum cut valve bypass valve. I suggest locating, and purchasing if necessary a repair manual for this truck.
The vacuum cut valve bypass valve is a solenoid type valve and generally remains closed. It is about halfway between the fuel filter and spare tire on a little ledge bolted to the wall. It is the Vacuum Cut Valve Bypass Valve. It could be something as simple as a clogged hose. Other than that everything else seems fine. I thought they sent owners a notice? If you have one adjustment screw, it will control your vertical aim. I was pretty sure the recalls recently were for different years.
I had a 1491 error code drive me crazy. I then replaced the the valve cut bypass valve four hoses going to it with a used one from junkyard. You might check all the vacuum lines to be sure they are all connected. But if it was not doing that before the mechanic worked on it I would take it back to him and say fix it. Please, let me know if you need any further assistance with this matter. Read post about blowing air through hoses and whala. I see the fuel sending unit recall started in May 2004.
The first thing to check when receiving this code is whether any hoses are missing or damaged, so I dropped my spare tire, crawled under the rear of my R50 Pathfinder, and looked around. On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. Search top and bottom, front and back, side to side. . There were two other hose ends dangling nearby, so I naively thought I could just connect these hoses together. You may be able to do this by simply disconnecting the battery for a few hours. Took apart valve cut bypass valve popped the top off with small slotted screw driver and cleaned inside which had debris in it,seemed to be rust or small granules inside.
What is so special about these classroom case studies? Vacuum cut valve bypass valve solenoid above, vacuum cut valve below. It opens only for on board diagnosis. I expect that replacing the cut valve will cure my P1491 code. Stop at the first shut-off click. It opens only for on board diagnosis.
The truck has been in to the dealer for a dx on a problem, I think it's interesting that they don't automatically check or ask you about it. The vacuum cut valve prevents the intake manifold vacuum from being applied to the fuel tank. The vacuum cut valve bypass valve is a solenoid type valve and generally remains closed. However, a lot of newer vehicles have electronically locked radios which require the manual to be able to be re-enabled. The vacuum cut valve is then bypassed to apply intake manifold vacuum to the fuel tank.
Is it possible the Saturn dealer we bought it from did not fix the recall? All vaccum lines start from the engine area, tranny area, and lead to the firewall back and other compenants. As of this moment, I await the cut valve and the successful completion of yet another issue with this somewhat neglected, yet very capable vehicle. I hope this helps others. We'll have it checked out. The vacuum cut valve bypass valve responds to signals from the. The vacuum cut valve is then bypassed to apply intake manifold vacuum to the fuel tank.
I can't find anything online or in the book about this part. I found a picture on ebay for one of these parts for a Maxima. Remove the hose and check. By making the mistake of topping off the tank just once, is it a problem that may get fixed by itself evaporation? After poking around, pulling hoses, removing and unfortunately breaking seized bolts, I got a good sense of how the charcoal canister is connected. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. We also have a 1998 Frontier that has had engine light problems since we bought it used in 2003. This is only the first time that I put gas on the truck ever since I bought it.
Start looking at different compenants that have small rubber hoses and try to trace them as far as you can. Is there a better one that you like? Have to get it scanned again to see what comes up this time! Cordially, carsandcomps, Guru, Premium Expert Fixya. You simply won't get water to the windshield. 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. I'd check out the radio before disconnecting the battery.
The line itself looked brand new on the outside but again was plugged solid from rusting inside out. I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. Any info or experiences with this? Two similar codes exist for this system: P1490 and P1491. Posted on Sep 30, 2009 It sounds like a vacuum leak either at the intake plenum or intake manifold, or egr valve. This could have been an old one? It's been a struggle to get the light off to get an inspection every year! There was a lot of mud caked on the hoses and components, so looking around and removing the canister resulted in a lot of dirt falling in my face. I'll call the dealer tomorrow morning.