[Vwdiesel] Vwdiesel Digest, Vol 77, Issue 19

[brian gochnauer]

I'd say (since I had a similar issue) with *not* a lot of smoke but no power
when a small hose in the vacuum system came loose.
Check the small vacuum hoses near the center of the firewall, just below the
hood seal, there's a bunch of them.
But really it sounds exactly like the issue I had when I blew a turbo intake
connection near the aftercooler (behind/below the passenger side headlamp)
Very little power and under any load it would just pour black smoke out.

imho,

BrianG



Date: Thu, 25 Mar 2010 14:22:26 -0400
From: Rolf Pechukas <rbp at 4u2bu.org>
Subject: [Vwdiesel] *help! smoking & bucking*
To: vwdiesel at vwfans.com, VW-TDI at yahoogroups.com
Message-ID: <20B1191F-0573-45BE-A2F8-7D41BA0BDF8B at 4u2bu.org>
Content-Type: text/plain; charset=us-ascii

hey all
this is a follow-up to my alternator failure adventure
(2001 VW Golf TDi)

events as they unfolded:

- driving from Boston to Cape Cod, my battery light came on

- battery clearly running down, alternator not charging, I drove most of the
way before the car died
was not running so good just before it died
I attributed that to CPU not getting juice

- had it towed to local garage, who replaced the alternator (OE Bosch
rebuild, 120A)

-  picked it up today, running terribly, no acceleration, black smoke under
any load, bucking
was initially un-driveable, now slightly better, put 30 careful miles on,
hoping CPU would 're-set' itself
not so much
exhaust smelly

- engine light is NOT on

thoughts:

- CPU clearly not driving the fuel pump properly

Q's:

- is it possible driving while running the battery down damaged the fuel
pump CPU??
- or even the fuel pump itself?

- shop charged up the battery before doing the alt
if they had reverse-connected the charger, could it have fried the CPU?

- would the car run at all if the CPU were fried?

- might pump timing need to be re-set? isn't that all CPU-driven?

- what else could explain this behavior?

thanks for any thoughts,

Rolf in MA