Date: Sun, 24 Dec 2006 15:22:21 -0500
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: 85gl acceleration Flat spot until warmed up
Content-Type: text/plain; format=flowed
Yes,
This is Dennis using a different e-mail address. Trying Hot mail for
traveling.
The injector is nothing more than a coil, like a solenoid valve. All of the
injectors are ultimately connected in parallel. When the fuel pump is on,
+12v is connected to all of them. The ECU operates them by switching the
return or ground. I have never seen one of the coils short out. It is
possible that a bad connection in the socket caused one to arc and burn up.
THe contacts in the socket do weaken, corrode, etc. There are a number of
options for repairing the sockets. I like to get the new style sockets and
pre crimped pigtail connectors as these make future repairs or testing
easier. I like the larger releases to get the connectors off.
Merry Christmas
Dennis
>From: TC <trclark@SHAW.CA>
>Reply-To: TC <trclark@SHAW.CA>
>To: vanagon@GERRY.VANAGON.COM
>Subject: Re: 85gl acceleration Flat spot untill warmed up
>Date: Sun, 24 Dec 2006 06:50:30 -0800
>
>FYI -So this was a werid one
>I spent sat morning testing the afm, tps that all looked within spec no
>traces showing the resitor board right resistance
>but I did see that 1 of the pins of the 4 pin afm connector did not seem to
>fit as well as the other 3 so I adjused that
>sam on the ecu built but no reral smoking gun
>then had a look for corroded wires found some in that high voltage box on
>the left side of the fire wall
>engine was warm by this time so I could test if any ot the tweeks fixed any
>thing
>So I took it out for run it seem to be ruuning ok then few miles down the
>road flat spot when warm
>then some hestitation the dead but no dash light come on ... but I am DOA
>and there is a distinct electrical burning smell I pull over & shut it
>off
>
>pop the engine hatch & heavy plastic burning smell
>Then I see it the left rear driver side fuel injector has melted down the
>harness was fused to the injector and the heat
>from the short ran up a few inched past the rubber boot
>after i get the harness off it looks like the short started inside the
>injector one of the coppper spades does exist
>and the side is charred black ....
>These injectors were cleaned at cruzperformance back in Feb 06 so I pretty
>sure the there was no corrosion on the electrical spade connectors on the
>injectors but I cant rule that out maybe the boot has been allowing water
>in
>
>and maybe when I fixed the corrostion on the big 10G voltage lines in the
>high voltage box this allowed proper
>current to flow in this circuit dunno I am grasping at straws
>
>has anybody ever seen an internal short on a fuel injectors I assume there
>is circuitry inside the injector?
>
>
>
>
>----- Original Message -----
>From: "TC" <trclark@SHAW.CA>
>To: <vanagon@GERRY.VANAGON.COM>
>Sent: Wednesday, December 20, 2006 3:57 PM
>Subject: 85gl acceleration Flat spot untill warmed up
>
>
> > err so I have this flat spot in acceleration until the wbx is warmed up
> > I put the lead down & nothing happens wait 2-5 sec then it accelerates
> > once the temp gage it mid point all it good
> > if i dont lead it but try to find the sweet spots it will not hesitate
>when
> > cold
> > but the right gas pedal pressure is tricky to find ...
> >
> > so things does ast 12 mths
> > new dist
> > new fuel reg
> > new plugs
> > new o2
> > new cap/rotor
> > cleaned fuel injectors
> > fuel/air filters
> >
> > last 24
> > temp 2
> >
> > last 48
> > python injection afm
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