Dude, easy on the caps lock.

The pressure regulator is located atop the fuel pump assy, which is in the fuel tank. It is a tight fit, but the regulator can be removed without dropping the tank or yanking the bed. There is a pinch clamp that holds the fuel line to it inside of the fuel pump assy.

 

Roger that! Sorry we have to type in that fashion here at the Practice on our laptops . Would it be better to change the entire assembly or start with just the regulator? also when replacing the fuel pump assy does the regulator come with it?

 

well mcss, i've had the same problem but had to move the coil wire away from the fuel injectors. Back-feed thru the wires to the computer, which inturn lied like a drunken sailor that everything was wrong but the computer.

 

The fuel regulator acts like a secondary fuel filter and can be purchased separately. It would not hurt to replace it.

 

When's the last time you changed the PCV valve?

Sometimes a bad PCV can cause lots of strangeengine gremlins. Not sure if it a PCV fits with the full tank theory, that could be do to a faulty fuel pump or maybe a bad check valve as with a full tank of gas pressing down, the pump doesn't have to work as hard to pressurize the fuel rail.

Also, a bad cam position sensor can cause rough running problems.

 

That was one of the suggestions sent to me along with rerouting the #5 wire away from #7 so I'll give it a try. As it stands the coil wire is in the stock location running along side the outside of the vavlve cover. Thanks!

 

Roger That I'll put it on my parts list and keep you posted.

 

I change the PCV at every oil change so this one is good. Where is the check valve located? Cam position sensor location?

 

Cam sensor is connected to distributor. There is a check valve in the fuel line going from the tank up to the engine, it keeps the gas from draining back down after the engine is turned off.

At this point though, you've thrown a lot of new parts at the thing and haven't gotten the results you're looking for. It might help to take it to a pro at this point.

 

You need to find an auto repair shop in your area
that has a
SnapOn Vantage meter with the high voltage module
to analyze your miss-fire in cylinder #5

http://diagnostics.snapon.com/

by looking at the high voltage readout in each cylinder
a well-trainned tech can hunt down your miss-fire
no matter whether
it is ignition related,
or fuel injector related
or low compression ratio related
...the vantage readout can spot all those things

if you are on a budget
a meter like this does not come close to being as fast as the expensive Vantage
but it will greatly help in a lower $ DIY hunt

http://www.etoolcart.com/index.asp?P...mp;ProdID=5073

if really short for money
sell it on eBay or Craigslist after getting the miss-fire fixed