The GTV6 has a Thermo Time Switch (TTS) in the cold start system. The
function of the TTS is to limit the duration of the Cold Start Injector
(CSI) to a few seconds under cold conditions. And to not allow the CSI to
squirt when it is not cold. Thus a faulty TTS could be allowing the CSI to
squirt when it is not needed (i.e. warm engine).
There is also a Throttle Position Switch (TPS) [not Throttle Position
Sensor]. Depending on model year the TPS is either a two position or three
position switch. The earlier models have the two position switch - it
signals the computer when the throttle is nearly wide open at which point it
tells the injectors to squirt lots of fuel and ignore the O2 sensor. The
later models have a three position switch - it tells the computer if the
throttle is at idle, not at idle or wide open. If yours has the later switch
but it is misadjusted the computer will not know the throttle is at idle and
will try to adjust the fuel injection instead of following its
pre-programmed idle map.
Info about the GTV6 L-jet system here:
http://www.hiperformancestore.com/Ljetronic.htm
And the Spider's L-jet system here:
http://www.hiperformancestore.com/Ljetspider.htm
Eric Russell
Mebane, NC
----- Original Message -----
Date: Mon, 2 Apr 2012 15:33:17 -0400 (EDT)
From: [email protected]
Subject: >
OK, I know this is weird, but for several years I've had this problem. So
far I have been able to get under way each time.
For example, this afternoon, the GTV-6 had not been driven in 24 hours.
The
car was sitting in the bright sun, and the outside temperature was in the
mid 70s. The inside of the car is hot, but I don't know the temp under
the
hood. I turned on the ignition switch, and the engine started immediately
as it usually does when cold. But then it immediately died as if I had
turned off the switch. This happens within the first second or so -
rrruumm then
it dies unless I am ready to pump the gas pedal.
If I catch it before it completely dies, it runs but stumbles like it was
running on five or four cylinders. This rough running disappears after
driving a block or less. If I don't catch it when it dies, it grinds and
stumbles until it catches. Then runs roughly as previously mentioned.
This does not happen when it is cold and has not been sitting in the sun.
It also doesn't matter if the temperature is in the 80s or 90s. This
problem
also occurs if I drive somewhere and leave the car for maybe a couple of
hours. I haven't actually timed it. If I make a short stop, then start
it,
there is no problem. But, if I leave it for an extended time, it fires up
then dies as above.
It acts as if the cold start valve shoots in gasoline, but some other part
of the system doesn't tell the computer to operate the fuel function.
Any ideas?
Thanks,
Bruce Sharer
Raleigh, NC
Annoying GTV-6 problem
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