

| Subject: | Re: Digifant question...fuel pump effect? |
| From: | SDF ( Scott Daniel Foss ) |
| Date: | Mon, 28 Apr 2014 20:33:58 -1000 |
For your needs and desires Don.. an inexpensive reliabe inline VW four is perfect. and your fuel injection system works well enough , and performance/economy is acceptible .. and emissions are not an issue. what's not to like ! ! ! ? ? Treating the fuel now and then is a very smart move. I would not consider 'never' treating the fuel itself .. reminds me ..a new-to-me modest work truck is due. Stabil is fine stuff, the one I really swear by though is SeaFoam. that stuff is magic. On 4/28/2014 4:13 PM, Don Hanson wrote: > Thanks Scott, very good explanation for me. Neil, no dirt or rust in my > fuel tank or pump. I've been dilligent about running some fuel system > cleaner through often and also I use Stabil as a fuel system cleaner after > finding it worked marvelously in my dirt bike tanks and carbs. > > I tend to be 'results orientated' when it comes to modifications...Like > even thinking about changing to a more "modern" engine management > system...If someone could show me a motor just like mine that was > significantly more effective with a different injection system, and the > improvement was significant enough to make the changeover expense and > labor worthwhile, then I might have cause to work towards those 'resulting > changes'.. I also tend to follow the "if it ain't broke, don't fix it" > philosophy and also 'leave well enough alone'...I learned early on that > modifying something doesn't necessarily always make it work better. > Chassis dynamometers are the great truth tellers....I had friends in the > racecar world spending thousands of bucks on the latest and greatest mods > only to find they'd actually lost performance or gained maybe 1 or 2 hp for > each thousand they'd spent.....They would have got more for their money > spending that money racing and getting faster driving....enjoying the > vehicle all the while rather than having it apart in the shop and spending > wads of money on it.. > > I've had Motronic P-cars...They were more powerful than my VW digifant.. > But certainly no more reliable..... I consider my Vanagon to be a rather > simple vehicle....I like it like that, because there are fewer things to go > wrong....Manual windows, no 'climate control' no OBD nuthin'....it works > just fine for me...I don't see guys with Motronic motors leaving me in the > dust, I more often see them posting on the boards about false Codes, broken > sensors, how to 'fool' the computer, etc etc...while I am off camping > somewhere in my digifant van...blissfully un-aware of how crude it is to > not have individual sequential injector firing... > > Thanks guys...I must be imagining that my motor is working better, mainly > because I no longer hear that pump that sounded like a jet engine spooling > up.... > > > On Mon, Apr 28, 2014 at 5:07 PM, Neil N <musomuso@gmail.com> wrote: > >> Don. >> >> Do you suspect there's any amount of dirt in the fuel tank? Did you >> find any dirt in the noisy pump internal screen? >> >> (no. Don't ask why I ask. ;) >> >> Neil. >> >> >> >> On 4/27/14, Don Hanson <dhanson928@gmail.com> wrote: >> >>> My fuel pump has been really noisy for about 1500 miles now and I just >>> replaced it with a new one...A quiet one... >>> >>> Now, with the noisy one, the van ran OK....no glaring issues with >> it's >>> digifant inline four motor....I did 'sense' a slight hesitation as I >>> accelerated from coasting...I think....and sometimes as I went from no >>> throttle to throttle, like at the bottom of a gully, there was a big >>> hesitation, like the motor was OFF for a second or two, then pretty >> normal >>> again... >>> I think this slightly "off" behavior has all gone away with the new >> pump >>> installed..I could be imagining it but the motor seems to run better now. >>> >>> ..... But is >>> it possible the noisy pump was making the engine run less perfect? >>> I should know, but how does the digifant fueling system actually work? >>> Could the old noisy pump be supplying inadequate fuel pressure and >> volume, >>> just by a little? It seemed to not matter how much throttle I was >>> using...the van ran fine, but just whining and noisy... >> -- >> Neil n >> >> Blog: tubaneil.blogspot.ca >> >> '88 Westy http://tinyurl.com/c8rlw6p >> >> '81 VanaJetta 2.0 "Jaco" http://tubaneil.googlepages.com/ >> >> Vanagon VAG *Gas* inline-VR Engine Swap Group: >> >> http://tinyurl.com/d7gd5ej >>
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