Date: Thu, 26 Sep 2002 15:47:37 -0400
Reply-To: Jeff Strickrott <jstric01@CS.FIU.EDU>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Jeff Strickrott <jstric01@CS.FIU.EDU>
Subject: Re: Bad Valve Issues/Question, Opinion sought.
Content-Type: text/plain; charset=us-ascii
I think I have ruled out the leaking injectors, as to whether they pulse is
another matter or have a good spray pattern. I ran all the Bentley test but
pulling the injectors and looking at them. Everything tested ok. The shop
today was going to test the injectors, adjust the CO mixture and hopefully
shed some light on the hot start issue.
When I tested the fuel pressure it was 36 psi when the vacuum hose
disconnected at the regulator (up to spec), and 29 when connected. When I
turned the engine off it stayed rock steady at 29 I believe. Cold start
manually removed and tested.
When I get the car back this evening I will redo all the test, including
compression myself to see if I get the same results. I just don't believe them
that the valves are bad when I don't use any oil, compression seems fine, and
it does not feel like I am running on only two cylinders.
By the way, when your vanagon is on the highway, what is you top speed on flat
ground (no tailwind/headwind)? I would image if I was not running correctly,
that I would notice a major difference.
Regards,
--Jeff
82 Westy
dr wrote:
> I am not sure how they determine that the valves are bad, by just
> disconnecting the plug wires. It could be the injectors in those 2
> cylinders are bad. I just went through this myself, on my 82 air cooled.
>
> I didnt have the hot start problem you have, but I was just checking the
> plugs and injectors. Here is what I did-
>
> I disconnect each plug wire individually and the rpm would drop about
> 500 for each.
>
> I then disconnected each injector plug, and got about the same results.
>
> I then removed each injector pair from the intake a side at a time,
> leaving the wire and fuel hose attached, placed a plastic peanutbutter
> jar (just happened to be a good size) under each injector. Disconnect
> the coil wire. Then ran the starter to watch the injector pattern. I
> found that one injector was barely emitting any fuel at all, and one was
> streaming out with fuel, even after shut off.
>
> My point is that even though I disconnect the plugs and injectors, and
> got an rpm drop; I had, in my opinion, 2 bad injectors. I never would
> have known this unless watching the spray pattern of the injectors.
>
> Your compression is better than mine; I have one cylinder at 98. The
> others around range 105 up to 120. Not real good, but it runs.
>
> For hot start problems, make sure your injectors are not leaking after
> you shut down (including your cold start injector - it shouldnt run at
> all at hot start), check your fuel pressure after you shut down, is it
> bleeding off?
>
> david
>
| 
