BIODIESEL & SVO DISCUSSION FORUMS






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6.5 engine problems
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ok so i have a 96 gmc with the 6.5 turbo and every once and a while it will just shut off while driving... have no idea why it does that.... throw it in neutral and it starts right back up..

any idea's as to why it's doing this????


1986 Ford F250 6.9L
1996 Gmc Suburban 6.5L
Home Brewed B100
Diesel Mechanic
 
Location: Chicago,Ill | Registered: March 14, 2010Reply With QuoteReport This Post
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that sounds like the problem I had, after spending 800 bucks it turned out to be a faulty fuel cap!!!!!. loosen the cap and see if the problem goes away. Do you hear a hissing sound when you open the cap after driving for awhile? (cap vent stuck closed causing a vacuum in the tank which the lift pump/IP can't overcome) Tom


" I don't know what I don't know until I know"
1994 GMC 6.5 Tubo 2005 Dodge ram 3500, 3 VW's 2000, 2002, 2005.
 
Location: Manitoba Canada | Registered: March 24, 2009Reply With QuoteReport This Post
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Kinda sounds like your PMD is going out on you,does it shut off like you turned the key off or like it is running out of fuel.Try this forum and search for PMD, http://www.dieselplace.com/for...orumdisplay.php?f=21
 
Registered: September 16, 2005Reply With QuoteReport This Post
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i was thinking pmd also... might have to move it off the injector pump


1986 Ford F250 6.9L
1996 Gmc Suburban 6.5L
Home Brewed B100
Diesel Mechanic
 
Location: Chicago,Ill | Registered: March 14, 2010Reply With QuoteReport This Post
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I too immediately thought PMD. Classic issue.

As for the fuel cap, the proper cap is supposed to be vented. Gasoline caps are not.
Granted the fuel tank should also be vented, so this should eliminate any cap issues.

Anyone think I am wrong on this at all?


________________________________________________________
Has anyone converted a W210 Mercedes to use SVO?
http://biodiesel.infopop.cc/ev...=857104535#857104535
 
Location: Arlington, Va.  | Registered: October 14, 2009Reply With QuoteReport This Post
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quote:
Originally posted by Renntag:
I too immediately thought PMD. Classic issue.

As for the fuel cap, the proper cap is supposed to be vented. Gasoline caps are not.
Granted the fuel tank should also be vented, so this should eliminate any cap issues.

Anyone think I am wrong on this at all?


If the fuel sender unit is properly installed, than the only open vent in the system is through the cap.

As for the problem indicated in this thread, this is a classic PMD issue. Its not a question of if, it will fail.

Get either the new grey stanadyne or the DTech and don't let it even get close to the IP. Get one of the long extensions and mount it on a heatsink behind the front bumper (there are two air ducts in the lower bumper) and don't forget to swap around the resistor from your old PMD. Keep it out of the engine compartment altogether and your PMD (and IP) will be happier. I always carried a spare PMD in the dash.

Bill


91 Buick Roadmaster wagon, GM 6.2 diesel conversion (gone but not forgotten
89 GMC 6.2 (Just got rid of the last pieces)
84 Mercedes 300D (gone to the great autobahn in the sky)
94 Cadillac Fleetwood (Sold before I could convert it)
 
Location: Manotick, Ontario Canada | Registered: July 02, 2002Reply With QuoteReport This Post



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posted Hide Post
quote:
Originally posted by Renntag:
I too immediately thought PMD. Classic issue.

As for the fuel cap, the proper cap is supposed to be vented. Gasoline caps are not.
Granted the fuel tank should also be vented, so this should eliminate any cap issues.

Anyone think I am wrong on this at all?


I think you are wrong,hah
 
Registered: March 31, 2012Reply With QuoteReport This Post
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