X2Originally Posted by nfpgasmask
Also might give any associated fuses a look.
Super VXer
X2
Also might give any associated fuses a look.
Billy Oliver
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Super VXer
Check the fuel pump fuse first. When it's very quiet, put your head right up near the gas tank (and hope it doesn't explode) while someone turns the key to 'on'. You should hear the pump run for two seconds. If you can't hear it run or are not sure, as per above, you can remove the pump relay and jump the terminals to make it run constant. If the pump only runs with the jumper wire, the relay may be bad. If you can't get the pump to run at all, the pump may be shot or there is some other wiring problem to the pump.
Pull the #1 spark plug closest to the battery. Carefully ground it while someone cranks the engine to check for spark and for fuel coming out the plug hole.
You're now checking the FACTS-
Fuel
Air
Compression
Timing
Spark
If you have spark and fuel, assume you have air and compression, so how 'bout timing? Did the timing belt or tensioner break? It could also be the crank position sensor or a bunch of other stuff.
I checked my Isuzu archives and I have an Isuzu tech video for a hard start/no start condition. I covers a whole lotta stuff you won't wanna check yourself, but you may pick up a few things to check on your own.
31.1 MB, 17:24, Real Movie file only-
http://www.drivehq.com/file/df.aspx/publish/mgpa/vids/hardstart.rm
I guess you need a Real Player to see it? I tried to convert it to a wmv or mpg, but I don't have a program to convert rm movies to other formats.
Mark Griffin
Last edited by deermagnet : 12/23/2010 at 08:45 PM
Super VXer
Not bad ideas, if I turn my key to the run position, I can hear my fuel pump come on and run to pressurize the fuel rail. You may not need a two person fuel pump party!!
Apparently we don't have a fuel pump shut off switch? I thought all newer cars had them. Oh well.
As for replacing the fuel pump, some of the guys on the planet save a ton of time but cutting a hole in the floor above the assembly, make a sheet metal cover to fit the hole. This way you can easily change the fuel pump without dropping the tank. Its all covered by carpet, so at an aesthetic level has no impact. Pick up some RTV or door gasket to make a good seal if you so desire and makes it easy to do on the road/trail or whatever. They had some problems with aftermarket fuel pumps. One guy went through three of em in just a few hundred miles. Luckily he had the hole which makes it easy to change on the go.
This is on my list of things to do this spring. I have a brand new OEM fuel pump assembly I scored on Ebay for 50 bucks shipped a few months ago! OEM is 300+ bucks IIRC.
I hope its something simple like the relay or a fuse!!
I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them.
Thomas Jefferson
Super VXer
if i remember correctly the VX may of had an access under the carpet anyhow....
anyone who has removed the carpet and taken pictures can check for me??
granted it could of been in any of the 1000's of other cars i ripped carpet out of in the last 6 years, but i seem to remember seeing something....
"Do Not Seek Praise. Seek Criticism."
"If You Can't Solve A Problem, It's Because You're Playing By The Rules."
"The Perosn Who Doesn't Make Mistakes Is Unlikely To Make Anything."
-Paul Arden
Super VXer
Ummm, nope
(its not that shiny once it dries...)
Super VXer
Also you should be able depress the schrader valve on your fuel rail with your VX off. Fuel should spray out for a moment before it loses pressure (if working correctly) then turn the ignition on for a few seconds and check the schrader valve again. If the pump is broken, there won't be any pressure behind the valve to spray fuel out.
Good luck
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