Hi David.

Going on a somewhat sketchy memory, but the OEM Luxembourg was within
tolerance, but the used and new FLAPS, weren't in spec at mid temps.
<searches his gmail>  Ironically, the warm start issue still happens.
I suspect an intermittent fault at the purge valve. But now I'm
OT.....

Here's what I posted a while back:

"Hi all.

On my Vanagon w/Jetta 2.0, I was having intermittent warm start
problems that would cause engine to take 5+ cranking sessions to
start. When started, it was sometimes rough, but would always feel
"flooded" when trying to start it. Recently, it would also "hunt" at
idle when restarted in hotter ambient temps. Being a DIY conversion,
was concerned problem might be due to an intermittent wiring flaw or
?. Seems not.

The suspect temp sensor bench tested out of spec mid range. This
coincided with what I saw at coolant temp gauge when hard to start
warm. In hindsight, this made total sense. The sensor was very likely
telling the ECU to make the mix too fuel rich (Thanks Scott for the
tip on that)

Currently a used VW branded temp sensor is installed. No warm start
problems so far, and no more error codes found in the OBD.

Posting this as the ECU portion of sensor is basically the same as the
ones used in the WBX engines. Also posting as I tested a new FLAPS
"Standard" made in China sensor. Bought this as VW wanted $54 Cnd.,
had to order it, and to my mind couldn't guarantee it would be OEM.
Besides. Figured I'd test something I'd likely stand a better chance
of finding out in the middle of nowhere.

Results below. Seems the new sensor is close to out of spec mid-upper
range. This might be due to my test methods though.

Neil.

    No Name             VW                           FLAPS "Standard" brand

21C  2900  Ohms       2300 Ohms             2500
27     2440                  1920                          2000
32     1940                  1550                          1600
38     1656                  1300                          1200
43     1360                  1070                            970
49     1130                    890                            780
54       932                    750                            620
60       780                    640                            510
66       666                    530                            420
71       555                    450                            350
77       470                    380                            290
82       400                    325                            247
88       337                    278                            222
93       286                    240                            215
100     217                    194                            204

"

On Tue, Jul 6, 2010 at 11:21 PM, David Beierl <dbeierl@attglobal.net> wrote:
> At 02:19 AM 7/7/2010 Wednesday, neil n wrote:
>>
>> and a new FLAPS brand sensor. They all gave slightly different
>> readings at various temps. The Luxembourg being closest to the graph
>> in the A3 Bentley This is for my Jetta swap, but IIRC, graph is the
>> same for the WBX.
>
> Were they within the specified tolerance on the graph?
>
> Yrs,
> d
>

--
Neil Nicholson '81 VanaJetta 2.0 "Jaco"

http://tubaneil.googlepages.com/

http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines