

| Subject: | Re: 83.5 Runs for about 4 seconds |
| From: | Daniel L. Katz |
| Date: | Tue, 2 May 2006 00:27:56 -0400 |
jeff: just for kicks, pull the 3/4" hose that goes from the black tower to the intake. plug the intake, and vent the blow-by from the black tower to the atmosphere. if this works to keep her lit, adjust the idle as necessary, and please let the list know the outcome. although i don't operate her this way, our '84 does idle best in this condition, a rock solid 900 rpm +/- a bit @ 12 deg btdc initial timing (as opposed to book 5 deg atdc). dan On Mon, 1 May 2006 03:23:13 EDT, Jeff Oxroad <Oxroad@AOL.COM> wrote: >My Vanagon has been sitting for about 6 months without running for a myriad >of complicated reasons--most having to do with injury, finances, and work >scehdule. It ran fine when I parked it 6 months earlier. > >Finally getting back to the bus I started it and it runs like a bear for >about 5 seconds. (5 Seconds is actually longer than it sounds in the scheme of >things.) It runs good and strong in that time at idle without touching the >accelerator. Then it just dies all together. > >I'm not sure if touching the acclerator will kill it--but I think it will. >It's difficult to check because I can start it and let it run the 5 seconds >about 5 times. Then she doesn't want to start at all. > >I've checked all the vacuum lines and they seem to be in good condition. >Nothing clogging the air filter. The gasoline does not smell of varnish, and I >think if that were the problem it would not start at all. The fuel filter >before the pump is due for a replacement, but I did remove it to check it and can >blow through it with ease--I'm not sure if that proves it's not clogged. I >temporarily reinstalled it. > >I'm suspecting the fuel pump. But I'm not all that savvy with the electric >pump system. > >My theory is the pump can get up enough pressure to start the engine but >can't keep the supply or pressure up to keep her going. > >The pump is making an intermittment noise that can be heard at the pump. It >can;t be heard from the driver's seat. The frequency of the noise is in sync >with a noise from the fuel pump relay. I'm not sure if the two relays in the >private "high voltage" box are both for the fuel pump. But at least one of >them is definately making an audible rapid clicking sound in about one second >intervals (one second on one second off) when the ignition switch is on with >the bus NOT running. The sound from the pump is in the same one second >intervals and sounds like it could be the sound of the pump normally running with a >slight squeak and a slight sucking sound. > >I'm not sure if this pulsing is normal, but I suspect it's not. > >I replaced the fuel lines and fuel regulator about 4 years ago. So I guess >not all that recently. The pump appears to be the original. > >I'm looking for suggestions on what to look for and how to tell if the fuel >supply/pump/relays could be the culpret--or what else I might be looking for. > >And it's worth mentioning again, for those 5 seconds the bus runs it sounds >great. > >Thanks, >Jeff >83.5 Westy >LA,CA
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