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Can the vacuum hose just be changed it looks like kinda like a spark plug cover

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If it is only a vacuum hose then you can replace it with same size hose.
Spark Plug Cover?

Posted on Jul 21, 2013

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  • jenn Jul 22, 2013

    Its the vacuum hose thats goes right in the fuel pressure regulator that where the fuel is pouring out

  • jenn Jul 22, 2013

    Right on top of the fuel pressure regulator

  • wadingriver
    wadingriver Jul 24, 2013

    There is usually two hoses to the FPR. One of the hoses to the FPR is pressurized and one is not. If your car is running normal but is leaking at this hose, it is likely the High pressure hose. you need to get a high pressure hose, regular gas line wont hold up.



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When accelerating in 2nd and 3rd gear my Hyundai Santa Fe (2007) shudders. Seems fine in all other gears. The shuddering appears to be coming from the drivers side but this could just be because I am...

Check the ignition system. It may work fine while idling but fail during acceleration. Problem areas to be inspected include the spark plugs, spark plug wires and vacuum hoses. You should look for spark plugs that are covered in oil or sediment or damaged, spark plug wires that have damaged insulation, and vacuum hoses that are unplugged or leaking. The use of a fuel additive that contains both fuel injector cleaner and water remover can fix minor problems due to water in the gas and fuel injector clogs. Check the fuel pressure to test the injection system to assure proper pressure.

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How do i change the spark plugs

this job is not for a newbie. so here we go with instructions. i believe you posted under 2003 nissan maxima section for replacing plugs.
remove engine trim cover that covers manifold and valve cover.
remove ign coils on frt valve cover and remove and install new plugs
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Coil pack 2 is not working

First thing I would do is make sure it is getting a good spark and fuel. Since you already checked compression, the only other engine mechanical problem I can think of is a wiped camlobe. After confirming spark and fuel remove the valve cover and either measure the cam lift or start it up and watch the rocker arms and make sure they are moving as much as the others. To check for spark I would make a test plug. You may also want to make a cylinder balance tester and also you may want to purchase a noid light kit to make sure the injector is getting a signal.

Test Plug
You can make a test plug with a new spark plug and some wire, a mini hose clamp and an alligator clip. First open the spark plug gap to around 0.075" and strip both ends of a 16 gauge wire about 4 foot in length. Attach the mini hose clamp around the threads of the spark plug cause that is a ground and secure it with the mini hose clamp with the bare wire end in between to make a good connection. Next, take the other end of wire and secure to an alligator clip.

Now, you have a test plug. Remove any spark plug boot you want and insert your test plug onto the spark plug wire end you just pulled off and ground the alligator clip. Lay the spark plug in some shade somewhere under that hood and then crank the engine and look for spark. It should crackle with sound and should be blue but red is ok, orange is a little weak. If it can jump that 0.075" gap you should have no problem igniting an engine.

You can also use that to check coils on some vehicles.

Cylinder Balance Test
First of all you will need a 12-volt test light and about 8-12 inches of neoprene vacuum hose. The vacuum hose will conduct electricity cause it is carbon based, use an ohmmeter if you aren't sure and see if the vacuum hose you have will conduct.

Now, cut off the same # XXXXX cylinders you have in small equal lengths of the vacuum hose. 2-3 inches will do fine. The small diameter kind like to carburetors, etc will work as long as they fit over the distributor cap tower connection.

Now, mark all your spark plug wires at the cap or coil pack and remove them all. Put those short pieces of vacuum hose on the distributor cap or coil pack connections and shove the other end of the vacuum hose into the spark plug wire boot until it makes a good connection.

Now connect your 12 volt test ground clip to a ground and start the vehicle. With the engine running touch the 12 volt test light to each of the vacuum hose 1 at a time and listen for the cylinder to short out and die and drop in r.p.m. They should all be about equal. If 1 or a few don't drop or do anything than you have your dead cylinder there.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

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My blower control stays in defrost mode even while turned to dash or leg vent. I recently changed my plugs but I don,t see any loose wires or vacuum hoses that might effect this. Could I have done...

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