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#1
02-01-2008, 10:54 PM
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81 SD Fuel Problems
I looked at a car tonight that has a greasecar system installed.
It started right up and idled well and when it was up to temp it got switched to the VO and it purred. It seemed pretty decent. We had to come back later to drive it. The problem when driving was that it didn't have enough power to even keep it in 2nd gear. It stalled several times it seemed to have more power (though not real power) going downhill and lost power (I walk faster than we were going) uphill. We had the pedal to the floor and the car would get a bit faster and then lose it all. We went out and bought new filters, both line and spin on, and it helped just a little. Maybe 10%. There was a small fuel leak that I seemed to fix by cranking down the primer pump. I doubt there was any real problem that was caused by the pump. EDIT: The car has been sitting for 6 months and according to the owner drove fine last time her used it to make a round trip from Boulder to DIA (80 miles RT). He seemed genuinely surprised and unhappy that it didn't run correctly. What other fuel problems could there be? Thanks!
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Ginny in Denver-ish  78 300SD, 265K (mine) Last edited by imagesinthewind; 02-01-2008 at 11:03 PM. 
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#3
02-01-2008, 11:39 PM
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Did you try switching the system back to diesel to see if it runs any better?
I'm not familiar with the greasecar system, but assuming it has a aftermarket filter somewhere, that may be plugged- especially after sitting for months. Could be air restriction too- mice like to build nests in air cleaners...
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'83 300D Turrrbo 295K miles  
Last edited by Magoo; 02-01-2008 at 11:47 PM. Reason: add info
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#4
02-01-2008, 11:43 PM
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Maybe water in the fuel?
It's been sitting with just less than half a tank of diesel for 6 months. I told the owner to fill the tank with new fuel, add diesel dry and cetane booster and see if that helped.
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Ginny in Denver-ish 78 300SD, 265K (mine)
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#6
02-01-2008, 11:44 PM
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Quote:
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Ginny in Denver-ish 78 300SD, 265K (mine)
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#7
02-01-2008, 11:58 PM
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Possible answers:
Quote:
You where running on the Diesel tank. * Leaking fuel hose * Primer pump leaking * Algae/Sludge in fuel tanks, if it is in one = treat both. * Leaking pollack valve = the fuel switching valve, this would need to be replaced with a better quality unit. Look at these threads for the pictures......................................... Filters, Fungus, Biocide, etc. http://www.peachparts.com/shopforum/showthread.php?p=823378 Algae Clogged Filter Pic StarTron WORKS ! http://www.peachparts.com/shopforum/showthread.php?t=138728 W123 Fuel Tank Screen Replacement http://www.peachparts.com/shopforum/showthread.php?t=199206 Biobor, what is it, why do I need it??? http://www.peachparts.com/shopforum/showthread.php?p=723857
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