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#31
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Why would the return line cause it to lose fuel when you open the throttle?
If the purpose of the return line is to return unused fuel to the tank, theoretically there is less fuel passing through it as you open the throttle up. Scout "Bart Senior" wrote in message et... It didn't run at all until I changed the filters and bleed the system. I'll bet it's either the fuel pump or else the return line. Either of those fits the circumstances. "Scott Vernon" wrote Did it run OK after you changed filters. Air leak? "Bart Senior" wrote All filters are new. "Scout" wrote check your fuel filter. |
#32
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Scout wrote:
Why would the return line cause it to lose fuel when you open the throttle? If the purpose of the return line is to return unused fuel to the tank, theoretically there is less fuel passing through it as you open the throttle up. Not necessarily. With a Detroit, yes, but other types of injector systems do it differently. With our diesel (Ford Lehman) for example there is almost no return at idle, the return flow seems to be proportional to throttle setting (although it jumps when the load changes). A blocked return line could cause the engine to die but it would be more likely to surge or be unresponsive to throttle first (disclaimer- I am not an expert diesel mechanic and never played one on TV) Your advice about checking the filter again even though its new is right on. Say Bart do you have a vacuum gage on the filter outlet? Fresh Breezes- Doug King |
#33
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Bart Senior wrote:
I don't think I've met a Southerner that was stupid and mean. I have to admit as a group, they rate about the best in the US. Thanks. I am a Southerner and am proud of it. Cultural differences are being erased in this country, partly because of mass media and partly because of everybody moving around so much. There certainly are mean-spirited and/or stupid and/or dishonest Sotherners, just like among any other people... we try to weed them out early though ![]() identified a number of characteristics of Southerners, the main two are generosity and sense of honor. This doesn't necessarily mean that Southerners are more honest or have better families, just that we get PO'd if you insult them! Speaking of which, this guy is a hoot... genuine PhD and Southerner... used to write a column for the local paper until it was bought up by a Yankee franchise... http://xroads.virginia.edu/~DRBR/REED/tears.html DSK |
#34
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Scout wrote:
that's because so many Yankees have migrated South. It certainly explains the traffic problems. And why so many restaurants have given up serving sweet tea. DSK |
#35
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Bart Senior wrote:
Hmm, I was thinking about going to hard lines! There are a couple of benefits: greater flow is one, more compact, more resistance to various kinds of stress, less prone to leakage in places other than fittings... the down side is that they're more difficult to fit, and you can't pull them out of the way to work on something else. Over years, the hard copper pipe will work-harden with vibration and become impossible to keep tight. The copper pipe I put in is mounted so that (hopefully) the vibration will be minimum. I'd like to have a fuel scrubbing system. Me too... it's on the list, along with many other upgrades ... Have you seen these fuel monitoring systems that measure fuel flow and fuel return to track fuel usage. Yep... a lot of control systems we work on have some fancy fuel flow & fuel consumtion/efficiency packages. ... I read about them a few months back and I'd like to find out more about them. In industry, Siemens and ITT are about the best IMHO. For boats the FloScan is popular and seems practical. I know a number of trawler owners with these http://www.floscan.com/html/index.asp ... I don't want to be wondering how much fuel I have. You'd need a flow meter hooked up to a totalizer. Really, that seems like overkill for our boats. A good reliable tank level gage should be fine... most are cheap junk, like the ones in cars... better than nothing though! Fresh Breezes- Doug King |
#36
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![]() "DSK" wrote in message .. . Scout wrote: that's because so many Yankees have migrated South. It certainly explains the traffic problems. And why so many restaurants have given up serving sweet tea. Every truckstop across the country serves sweet tea, hon. SV |
#37
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Scott Vernon wrote:
Every truckstop across the country serves sweet tea, hon. Dunno about truck stops, but most Waffle Houses do! DSK |
#38
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![]() "Bart Senior" wrote ... It didn't run at all until I changed the filters and bleed the system. Because the filters were clogged, or you had air in the system? If the filters were clogged, the new one may have restriction already. Did you inspect the rubber gasket? Do you have 2 fuel filters? SV I'll bet it's either the fuel pump or else the return line. Either of those fits the circumstances. "Scott Vernon" wrote Did it run OK after you changed filters. Air leak? "Bart Senior" wrote All filters are new. "Scout" wrote check your fuel filter. |
#39
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Mmmmmmmm pecan waffles......
"DSK" wrote in message .. . Scott Vernon wrote: Every truckstop across the country serves sweet tea, hon. Dunno about truck stops, but most Waffle Houses do! DSK |
#40
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Good points Doug.
Also, in many of the fuel pumps I've worked with, a severely restricted return line will blow the pump seal. Scout "DSK" wrote in message news ![]() Scout wrote: Why would the return line cause it to lose fuel when you open the throttle? If the purpose of the return line is to return unused fuel to the tank, theoretically there is less fuel passing through it as you open the throttle up. Not necessarily. With a Detroit, yes, but other types of injector systems do it differently. With our diesel (Ford Lehman) for example there is almost no return at idle, the return flow seems to be proportional to throttle setting (although it jumps when the load changes). A blocked return line could cause the engine to die but it would be more likely to surge or be unresponsive to throttle first (disclaimer- I am not an expert diesel mechanic and never played one on TV) Your advice about checking the filter again even though its new is right on. Say Bart do you have a vacuum gage on the filter outlet? Fresh Breezes- Doug King |