Date: Wed, 17 Jun 2015 23:15:44 -1000
Reply-To: "SDF ( aka ;jim lahey' - Scott )" <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: "SDF ( aka ;jim lahey' - Scott )" <scottdaniel@TURBOVANS.COM>
Organization: Cosmic Reminders
Subject: Re: Engine hesitates upon take off
In-Reply-To: <CAEwp_cSe-T1=E2HmM4G8eJ+Yy9pq8C3jROxfmTbwkcsVA1h0HA@mail.gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed
the spray pattern of the injectos is exceptionally easy to test right on
the engine.
See Bentley.
I have rarely seen a genuinely bad-spary pattern waterboxer injector.
...a few , but not many realy.
the ecu fires all for injectors at once ..
like one 4-part injector. So doesn't matter which connector is on which
injector.
which is kinda sloppy actually .......not very precise for sure.
given that every cylinder is on a different stroke at a given instant ..
it all works out ..just not very precise.
There's an oppossed 4 cylinder engine that some people install very
successfuly in Vanagons with a much more modern engine management system
those have Sequential Fuel Injection ..
the ECU knows precisely where each cylinder is and the individual
injection for each cylinder if fired at exactly the correct tim for that
cylinder - nice.
Anyway, not a big surprise to me that the new injectors did not make a
big difference.
there's an old Rule from carburetor days ..
still applies ...
first you check *everything* about the engine mechanically
...compression .....vacuum leaks ...unrstricted exhaust system ...air
intake system ....rocker arm adjustments etc...everything that is
'mechanical'.
next check the ignition system very very carefully ....make sure that
it is all right ..strong spark, correct timing etc.
I've seen spark plug wires be 'it' a few times ...when it didn't seem
like it should be ..but it really was.
Watch the engine run in total darkness and look at the plug wires.
then get into the fuel injection.
there are numerous pretty easy checks in Bentley .
doing those ..if nothing else you learn a lot and might discover
something in the process or even fix it.
if there is the temptation to think it's One Thing..
resist that temptation.
I have seen countless cases of poor running or hesitation or running
issues where it was 5 half things, or more.
good luck !
On 6/17/2015 2:20 PM, Marc Perdue wrote:
> Hi all,
>
> Well, today was overcast and in the low 80s, so I took off the
> afternoon from work and installed my new fuel injectors. One of the
> screws on the old injectors was so rusted I had to drill it out to get
> the injector off without breaking the manifold. Because that took way
> more time than it should have, I didn't get a chance to drive the van
> today. It did, however, start up pretty quickly after I got everything
> back together. At this point, I was just looking to see if there were
> any leaks and if the van would start. No leaks! Yay!!
>
> One thing I realized as I was putting everything back together,
> though, is that the connectors for the injectors aren't marked at all.
> Does it matter which connector is connected to which injector? I tried
> swapping the ones on the driver's side and it didn't seem to make any
> difference.
>
> I'll let you all know the outcome after I've had a chance to drive it.
> My gut feeling at this point is that there doesn't seem to be an
> appreciable difference in the way the engine runs. We'll see . . .
>
> Marc Perdue, in central VA.
>
> On Mon, Jun 15, 2015 at 10:25 AM, Rick Cooper <rickdcooper@gmail.com> wrote:
>> I've noticed that when accelerating from an intersection, after sitting at
>> a red light, my 2.1 WBX will sometimes hesitate for 5 to 15 seconds. I'll
>> start moving, but the engine has no power and giving it more gas does
>> nothing. After those few seconds, the engine will start to pick up power
>> and soon everything will be running fine.
>>
>> This has just start happening and is still sporadic, but it is becoming
>> more frequent. Seems to only happen after a full stop, like at a red
>> light. Would this be a clogged fuel filter or what?
>>
>> Thanks for any ideas. FWIW, the fuel tank and the ECU were replaced a few
>> years ago.
>>
>> Rick
