still battling hard start/cold start - more info
LawyerKG at co.laplata.co.us
Tue Aug 13 17:37:28 EDT 2002
BRIEF REVIEW: my hard start/cold start problem is: after sitting for 4-5
hours or more, my '90 200tq is difficult to start regardless of outside
temp. I must crank, stop, crank, stop, crank, etc... start!!! I will
say that sometimes it idles very poorly for the first 10 seconds or so
NEW INFO: I discovered that if I allow more time - approx 30 seconds -
after the first time cranking it fires right up on the 2nd try. If I
wait only 3-5 seconds between attempts I must try several times, each
time with increased success until it finally starts. What could be
happening during this 30 seconds after the first cranking attempt????
Once running I can kill it and restart easily until it sits for 4-5
MORE NEW INFO: I discovered I can reproduce the problem by pulling the
connector on the ISV and allowing the car to chug and die as a result.
If I then replace the connector, turn the ignition entirely off so as to
"reset" power to the ISV, and try to re-start I'm back to crank, pause,
crank, pause, crank, start.
WHAT'S NEW: ISV temp sensor, coolant temp sensor. Swapped in
different ISV from parts car, cleaned both ISV's w/carb cleaner.
ALSO: tried jumpering the fuel pump for up to 45 seconds in the morning
thinking I was losing fuel pressure. I can hear the pump run and hear
things gurgle/flow up at the motor, but this makes ZERO difference in
the behavior of the hard start problem.
Any help is appreciated, I'm at a loss. I can't seem to find any
problem exactly like this in the archives. The car happily holds 1.4
and does not overboost so I'm ass-uming no vac leaks.
More information about the quattro