Date: Fri, 5 Jan 1996 11:50:06 PDT
Sender: Vanagon Mailing List <vanagon@vanagon.com>
From: "Shawn Wright, SMUS Network Analyst" <swright@smus.bc.ca>
Subject: re: Bosch CIS problems
> Hi All,
> I need some input. I have a 82 Westy Diesel that I converted to gas
> using a 83 Rabbit GTI motor. I used the stock CIS fuel injection. All has
> been well until it started getting cold.
>
> My problem: 1st, It started skipping. Not ignition related. checked
> everything, cap,rotor,wires plugs,halls unit and control unit, everythings
> OK and most of it is new.. It would skip worse when I gave it more thottle.
> Then as suddenly as it started skipping it stopped. Ran great, for a
> while. When it started again I decided to check FI parts. Everything I
> could check with a test light and multimeter, except Fuel pump seemed to
> check out. Finally I borrowed a fuel gauge and the pressure seemed fine,
> about 68psi. Now the book said pressure was ok but the cold pressure
> seemed high. Lets put it this way the pressure never dropped below 50 from
> start-up til operating temp. When the car was off the pressure dropped to
> 28psi and stayed there for the time allowed when checking for leaks.
> However fuel pump output was less than 16oz for 30sec operation. Book said
> at least 32oz. I replaced the fuel pump. Output great over 32oz of 30sec
> operation. The engine didn't run anybetter right away. Then suddenly bam
> runs great. And has seemed to run good ever since. Although a couple of
> times I felt it skip under acceleration. Problem #2 Now it doesn't like to
> stay running cold. I have to start the van between 8 and twelve times
> before it will stay running. It driving me crazy. I hooked a gauge to it
> today. It never dropped below 70psi right from the start. I've been told
> its the warm up or control pressure regulator. I guy at the GM shop I work
> at said its the injectors. (He's an old Saab tech and said Saab and VW used
> same injection system, he also said injectors where Saabs big problem when
> they were cold and ran crappy.) I'm at my wits end. HELP. I can't afford
> to buy more parts just to have them not completely cure them problem. At
> first I thought this problem was because of something I did during the
> refitfrom the rabbit. I have checked and triple checked everything
> associated with fitting the FI from the rabbit and it checks out OK.
> Please help me. Thanks for your help. I think in the future when money
> allows I'm going Digijet(?) Injection from an 88 or newer Golf or Jetta.
> Looks like alot less parts and wires. Probably cost twice as much to fix.=)
> E-mail me or post a reponce to the list. Thanks. By the way the
> convertion from diesel was fairly easy, if anyone want to know E-mail me.
>
> Keep on Busin' -Jim D
Jim,
I've got an 82 Scirocco w/ CIS - it showed similar symptoms, and the
PO had already replaced the warmup reg., so I tried the injector
O-rings - it's been running great ever since! Cheapest fix ever -
about $3 !
The injectors are hard to get out - I clamped carefully with pliers &
pried *straight* out. The O rings become brittle from the heat after
a while & no longer seal well.
PS: I'd be very interested in some info on your conversion also.
Shawn
*--------------------------------*
| Shawn Wright, Network Analyst |
| St. Michaels University School |
| 3400 Richmond Rd, Victoria, BC |
| Canada V8P 4P5 |
| (604) 592-2411 Fax: 592-2812 |
| swright@smus.bc.ca |
*--------------------------------*
I haven't lost my mind; I'm sure it's backed up on tape somewhere!
| 
