Date: Wed, 19 Oct 2005 21:40:55 -0500
Reply-To: Tim Marciniak <tmarciniak@WI.RR.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Tim Marciniak <tmarciniak@WI.RR.COM>
Subject: Re: Hard Starting Cold and Hot
In-Reply-To: <4356F3EC.1070400@verizon.net>
Content-Type: text/plain; charset=US-ASCII; format=flowed
Mike,
I have thought about this to, when my passat was acting like this it
was the fuel pressure regulator to. It was very difficult to diagnose
at the time since it passed the residual pressure tests and the spec
pressure when it was running was ok. I cant remember what made me just
go ahead and change it but i did and it worked. The van seems to be
acting like it is flooded when its hot--my having to put the pedal to
the floor to start it.
Thanks,
Tim
On Oct 19, 2005, at 8:33 PM, Mike Collum wrote:
> Tim,
>
> As far as the restarting ok when warm ... if it's within a few minutes
> of shutdown ... but hard starting after sitting (after being run) ...
> I've had these symptoms on 2 different wasserboxers. Both times the
> cure was replacement of the fuel pressure regulator.
>
> It seems that the fuel pressure regulator was maintaining too much
> pressure (though it tested within specs while the engine was running)
> and overwhelming the injectors causing them to weep thereby flooding
> the engine over time. If it sat for many hours then the pressure
> would finally bleed off ... the injectors would stop leaking (flooding
> the engine) and it would start normally.
>
> Of course, I don't know if this is your problem ... but it sure was
> mine ... twice.
>
> Please let me know what your "Fix" is.
>
> Mike
> '84 GL 7 pass
> '85 GL Westy
>
>
> Tim Marciniak wrote:
>> I have a 90 Vanagon 2.1L with Automatic, 95k, that I am having hard
>> starting problems with when the engine is cold and when it is hot.
>> When cold it starts readily but the idle is fairly lumpy and if I
>> press
>> on the accelerator there is a major lack of power and it seems just
>> like a spark plug miss. After about 1-2 minutes the idle evens out
>> and
>> it runs ok.
>> When the engine is hot if I turn it off and try to start it about 1-5
>> minutes later it starts fine. If I try to start it about 15-30
>> minutes
>> after it was completely warmed up it is very difficult to start. The
>> starter spins the motor fine but it does not start. In order to start
>> i have to press the accelerator pedal to the floor and the crank the
>> key like you do with a flooded carbuerated engine---in a few seconds
>> it
>> then starts and the idle evens out and it runs fine.
>> What I've done so far:
>> -cleaned up ALL grounds
>> -added two additional ground wires, one from the tranny to the body
>> and
>> another from the starter housing to the neg on the battery
>> -new o2 sensor about 5k ago
>> -cleaned idle stabilization valve and it hums
>> -new spark plugs, new spark plug wires, rotor and distrib cap are ok
>> -checked engine vacuum--no leaks
>> -checked intake system--no false air
>> -checked throttle switch--ok
>> -replaced coolant temp sensor
>> -checked air flow sensor--ok
>> -checked fuel pressure--ok--residual pressure ok
>> -checked ignition timing--ok
>> things i have not done:
>> --pulled and check the fuel injectors, I cant see why it would be this
>> when it runs fine otherwise
>> --not sure how to check the idle stabilizer control unit
>> I am close to giving up on this problem and take it to my local
>> mechanic. It has been a long time since I had to take the van in
>> since
>> I have been able to fix most everything that has gone wrong with this
>> van.
>> I would appreciate any suggestions from the list. I would sure like
>> to
>> fix this problem on my own.
>> Tim
>> 90 Multivan (hard starter)
>> 95 Passat GLX
>> 03 New Beetle Turbo S
>> 89 Jetta GL
>> 99 Jetta
>
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