Ford Fuel System :: Location Of Check Valve That Maintains Fuel Pressure On The System?
I have a '99 E-350 6.8L. Where is the check valve that maintains fuel pressure on the system?
I have been experiencing a starting issue when the engine is hot. Cold starts are usually fine. I've replaced the in-tank fuel pump (pump only, not the assembly) to no avail. I was out of town and didn't have access to a fuel pressure gauge when the problem started so I couldn't say what I had prior to replacing the pump. But now, with a new pump, when I check pressure, I get about 40 psi when I first cycle the key on, but it drops right back to zero as soon as the pump shuts off. If I cycle the key on a few times, sometimes I can get it to hold pressure at about 32 psi, and it starts fine. When I shut if off, it goes back to zero psi, sometimes gradually, like a bleed down, and sometimes immediately.
My conclusion from this was that the check valve was bad. I was told it was part of the in tank fuel pump assembly. Since I didn't replace the entire assembly, this made sense. So I just dropped the tank back down, but I don't see anything as part of the pump assembly that serves as a check valve. There is a rubber nipple on the end of the return line, but I don't see how that can hold any significant pressure.
So, before I go out and spend another couple hundred bucks on the complete fuel pump assembly, which apparently can't be purchased without the actual pump, I thought I'd ask. Where is the check valve that holds the pressure in the fuel system?
BTW, I also have replaced the fuel rail pressure regulator, but it made no difference (I went there first since that was much easier than dropping the fuel tank a second time).
Ford Fuel System :: Power Valve Check Ball
What a dilemma, somewhat of a novice, about to rebuild Holley 1850 for 2nd time in past 12yrs and dispite a number of backfires over the years does not appear to have damaged the 'power valve'. Purchased the Hly 125-500 check ball kit, although the installation appears fairly simple, taking a drill to my throttle plate I have some reservation. Any members familiar with the upgrade, considering returning the kit and not risk, thru operator error, ending up replacing carburetor.
View 7 RepliesFord F-150 (2004-2008) :: PCV Replacement Without Taking Off The Valve Cover?
5.4L 3v engine: The PCV is located in the drivers side valve cover. Tried to pull it out with no success and came to the conclusion that maybe it's threaded and a nut locks it in from the underside of the valve cover. Can this thing be replaced without taking off the valve cover?
View 4 RepliesCamry :: Valve Cover Gasket Replacement On 2006 V6
So I'll be taking on a project to replace the valve cover gasket on my 2002 Camry V6. There's a bit of leakage through the gasket. And while I'm at it, I'll replace the spark plugs as well. I'm looking for a write up on this project. did a lot of searching but couldn't find anything.
View 14 RepliesSanta FE SM (2001-06) :: Valve Cover Gasket Replacement
How difficult is it to replace the valve cover gasket on a 2001 Santa Fe with a 2.7? Can I just do the 'front' valve cover? Are there any tutorials with plenty of pictures while doing this?
View 4 RepliesInfiniti - G35 :: 2006 - Valve Cover And Gaskets Replacement
I have a 2006 Infiniti G35 base sedan. The dealer noticed oil on the engine and said that I needed to replace both valve covers and gaskets -- My question: Why is it necessary to replace the valve covers and not just the gaskets?
View 6 RepliesAvalon 2005-12 :: Valve Cover Gasket Replacement
A few days ago I noticed some oil leaking from the left (front) valve cover area and I suspect it's the gasket. Fortunately, I didn't see any leaks from the back cover. It seemed like an easy job to replace the gasket, but as I started to disconnect the wiring, e.g., cam sensor, spark plugs, etc., I can't seem to find a way to remove the black plastic wiring harness 'housing' out of the way.
View 1 RepliesFord Super Duty (1999-2016) :: 2002 F250 5.4 - Valve Cover Leaking - Gasket Replacement?
I have a 2002 F250 5.4with Air Conditioning. The valve covers are leaking and the gaskets need to be replaced. I am attempting the valve cover gaskets. I was able to get the drivers side cover off with some difficulty. For the passenger side valve cover. There is very little " no" room to get at the bolts. I read somewhere that I may have to drop the engine on that side. I will do that if I have to.
View 5 RepliesLexus SC430 :: 2002 - Valve Cover Gasket Replacement?
How to replace valve cover gaskets on 2002 430sc???
View 14 RepliesGolf IV / Jetta IV :: Misfiring After Valve Cover Gasket Replacement
I did a valve cover gasket replacement. Changed all spark plugs and coilpacks. The car is still misfiring. I also just did the timing belt and water pump. Why it's still misfiring?? I'm new to this whole forum thing so bear with me lol. I'm wondering if it would be my cat, fuel pump, fuel filter. Or could it be a sensor?
View 2 RepliesGolf V R32 :: Throwing P0174 Code After Valve Cover Replacement
A couple months ago I was hearing a hissing noise under the hood throwing the same code replaced the Valve cover, after there was no issues. Yesterday saw I had CEL and I was throwing P0174 code and there is a similar vacuum leak sound coming from under the hood but the Breather in the valve cover is not sucking in air. The Oil cap comes off but the engine starts to bog, what it could be now?
View 2 RepliesAccent LC (2000-05) :: 2002 - Valve Cover Gasket Replacement
Replaced this gasket that seems to be leaking oil. Looks simple enough, is there anything i should do or know before taking on this job? It's a 2002 Accent GS 1.5L ....
View 8 RepliesMercury - Sable :: 2008 - Cutting Off After Valve Cover Replacement
I have an 2008 Mercury Sable Premiere with a 148 miles on it. Just got the Valve Cover gasket replaced and new water pump put on. The car is running very smooth as it always done,but now when coming to a stop,it either acts like it wants to cut off or sometimes it just shuts off. When it cuts off I immediately crank it back up and it starts, but why or what could be the problem? It also starts up a little slower than before and I know its not the battery because that's brand new.
View 6 RepliesPassat (B5) :: Oil Loss After Cam Tensioner And Valve Cover Gasket Replacement
I noticed the oil smell that can be associated with a leaking Cam Tensioner Adjustor Seal from my 2003 1.8T Passat a few months ago. The dealer confirmed that it was leaking and that it was covered by my extended warranty since my car was 5 years old and at 70K miles. I had the work done and after I picked up the car I noticed that the oil level was at the top of the hashes not at the top bend like it was when I took it in.
I don't know what caused it to drop to the hashes but I do know that the level has dropped to 3 visible hashes in the little over 1K that has been put on the car since then. I am concerned because in it's first 70K miles the car did not visibly lose a drop of oil.
Any logical cause for this annoying trend, the only thing that changed was that the Cam Tensioner and Valve Cover Gaskets were replaced. Is it possible something else was messed up during the repair?
Golf IV / Jetta IV :: For Valve Cover Replacement Spark Plug Should Be Taken Off?
In order to replace the valve cover do the spark plugs have to be taken off ?
View 12 RepliesFord Fuel System :: 1994 F150 Won't Start - No Fuel Comes Out Of The Valve
1994 150 300 6. parked truck after lunch finished work and it wont start no fuel comes out of the valve. Can't get the pump to work even when jumping the 6 pin. heard the relay click still nothing. Checked the inertia switch it wasn't popped. Took the pump out jumped it straight from the battery pump works . I know there has to be something i am missing...
View 7 RepliesFord 7.3L Power Stroke (1999-2003) :: Fuel Filter Bowl Drain Valve Replaced - Emission System Warning Light
I just changed the drain valve on the fuel filter bowl. All went well and no more leak, but now I am getting an "emission system" warning light.
After I replaced the valve, I filled the fuel bowl with diesel fuel. Was there any other priming that needed to be done (if any)? What the emission system warning light may mean?
2002 F250 7.3L 4x4.
Mazda :: 2004 - Idle Bounce While Coasting After Valve Cover Gasket Replacement
I've got a 2004 Mazda 6 with the 3.0L V6 & a 5-speed, with about 128k miles.
The car runs fine, but was leaking oil onto the exhaust manifold and so I recently had the valve cover gaskets replaced. the mechanic could not get replacement gaskets from Mazda, and so changed the valve covers themselves also, and consequently needed to replace a couple of hoses that connect to the valve covers.
Since the repair, the car drives fine - acceleration seems normal, I don't notice any performance issues. The CEL is NOT lit.
1) When the car is in neutral, but rolling, the idle consistently bounces back and forth precisely between 1250 & 1500 rpm. This occurs always, and happens whether the gearshift is in neutral or the clutch is depressed. With the radio off I can hear the engine surging when this is going on. As soon as the car comes to a complete stop, the idle immediately drops to the a rock-steady position just below 1000 rpm, as it always has.
2) I assume related to the above, but since the repair my gas mileage has dropped from its usual 18-19mpg to 15.7-15.9mpg as recorded at two fill-ups, and my current tankful is looking to return equally low mileage.
I brought the car back to the shop and the mechanic took the car out for a drive with me, with his computer hooked up while we drove. He found nothing wrong, nothing out of whack, and saw no evidence of any air leaks.
1) Seems strange to me that the valve cover gasket couldn't be obtained, and new valve covers were needed. I want to believe the garage is being straight with me. Is this really plausible?
2) What could cause the idle to behave this way? I understand what a valve cover does (in my earlier years I changed the cylinder head on my old Saturn) and can't figure out how or why changing the valve covers would have an effect like this.
That leads me to conclude this is more likely caused by the new, slightly different hoses attached to the valve cover, but I don't know exactly what those hoses do or why they connect to the valve covers, so I'm stuck here.
Ford 6.0L Power Stroke Diesel :: CCV Breather / Filter On LH Valve Cover
As far as I can tell, the rectangular breather is full of some type of stainless mesh. I cannot separate the halves. I may have pulled a bonehead move and left it tin the solvent tank and didn't realize it was still on....ofcourse it was full of solvent. Just cleaned it real well. I drained it and am going to let it dry out before install next week.
View 4 Replies