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-   -   Fuel line check valve (http://www.defendersource.com/forum/f6/fuel-line-check-valve-25778.html)

peachyracer May 27th, 2010 01:20 PM

Fuel line check valve
 
I'm having some starting issues, and have narrowed it down to fuel leaking back past a valve in the fuel pump and thereby lowering fuel pressure to the point where it takes some time cranking the starter to build back up before it's high enough to start the engine. Rather than dropping the fuel tank and spending $329 at Rovers North for a new pump/sending unit/check valve assembly, I thought I'd just try to put an external check valve on the fuel line. Anybody try this and know where to get a suitable check valve?
Thanks!

evilfij May 27th, 2010 01:22 PM

Why do you think it is not a leaking fuel injector?

peachyracer May 27th, 2010 02:49 PM

Quote:

Originally Posted by evilfij (Post 223543)
Why do you think it is not a leaking fuel injector?

Hmmm. Well, it started okay, and then then had to replace the fuel pump because the sending unit was bad. After that, the starting issues slowly got worse. I'll take a look at the plugs for sure and see if the injectors are suspect. Thanks for the suggestion!

Hans May 27th, 2010 04:50 PM

could also be the regulator up on the manifold.

peachyracer May 27th, 2010 05:19 PM

Update:
Dammit, Ron :) , I took all the plugs out, put 'em back in, and now it doesn't start AT ALL! So what does THAT tell us? the current plugs (with about 3000 miles) looked very good I thought, i.e., blackish/grayish with a hint of tan. Plug wires say "7mm standard triple silicone" on them. (I was told by a Rover mechanic in Memphis (Livingston at Euro-Imports) to change to 8mm. However, I doubt if THAT would be the immediate problem....)
Hans, can you test the regulator or is it just a replacement part?

Hans May 27th, 2010 06:06 PM

Sure can. Clamp a vice-grip over the return line, and see if the problem goes away. Just don't leave it there when you're driving around.

-Hans

peachyracer May 28th, 2010 10:46 AM

Quote:

Originally Posted by Hans (Post 223596)
Sure can. Clamp a vice-grip over the return line, and see if the problem goes away. Just don't leave it there when you're driving around.

-Hans

Tried that, no dice. Cranks, but doesn't fire...not even a little. When I clamped the return line, I heard a bit of a thunking noise, but figured it was because the fuel was being restricted from returning to the tank. Took off the clamp, and the noise stopped. Seems to me that says there's fuel pressure, and spark is my problem (ask my wife...no don't). Now what?
Thanks for your help, guys. I'm trying to get this thing going today so I can take my daughter to Indy tomorrow for the 500.
Pete

------ Follow up post added May 28th, 2010 11:04 AM ------

Well, she fired! At the coil, there was a loose white wire coming out of the loom and an open connector that was piggy backed on a black wire connector that went to a capacitor. I saw it there but didn't think the two went together because the wire didn't reach and the connector didn't look like anything was ever connected to it. I was also loath to connect it because I didn't want to fry the whole electrical system. I called a buddy with two Defenders in his garage, and one of the coil looked like mine. I stretched just enough slack in the wire, gave it a try, and away she went. Whew!

So now, I still have to deal with the fuel pressure problem...


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