From: ericc@Arco.COM (Chang Eric(214)754-3562)
Subject: One idle problem solved, one remains
Organization: ARCO Oil and Gas Company
Distribution: usa
Date: Mon, 16 Nov 1992 14:17:22 GMT

I finally repaired that unpleasant problem that I asked for help on the net
some time ago.  (It was sufficiently complicated such that no one was able to
answer my post.)  Recapping, the engine would not keep running under idle
conditions.  I suspected the idle control motor, but someone at work suggested
that I look at the throttle position sensor first.  His rationale was that the
idle control motor never broke because of its design.  The throttle position
sensor, on the other hand, breaks easily.  If it malfunctions, the engine
control computer can read a full open throttle and open the EGR valve.  If this
occurs at idle, the broken vacuum kills the engine.  Since the throttle
position sensor is simply a potentiometer,t can get a dead spot at the position
of greatest wear, that is, the idle position.  So, I could temporarily repair
the problem by just loosening it with a screwdriver, twisting it a degree or so,
then tightening it.  The dead spot moved to a different location.

Now, however, I have another problem.  I don't know where this problem is
coming from.  The car has a standard shift and sometimes (but only sometimes)
when I coast to a stop from a long fast run, the engine dies.  This sometimes
happens when I get off the freeway, but it does not happen every time.  In fact,
if it happens once, it will usually not happen again in a day.  Thus, it is 
very difficult to diagnose.  In the past 3 weeks, it has happened 4 times.  Not
enough to repeat it, but enough to find it annoying.  No matter how I try, I
cannot duplicate it immediately afterwards.  Could it be the dashpot?  Too
simple?  Thanks.       Eric

Newsgroups: rec.autos.tech
Subject: idle problem solved, new problem
Distribution: usa
Organization: ARCO Oil and Gas Company

I finally repaired that unpleasant problem that I asked for help on the net
some time ago.  (It was sufficiently complicated such that no one was able to
answer my post.)  Recapping, the engine would not keep running under idle
conditions.  I suspected the idle control motor, but someone at work suggested
that I look at the throttle position sensor first.  His rationale was that the
idle control motor never broke because of its design.  The throttle position
sensor, on the other hand, breaks easily.  If it malfunctions, the engine
control computer can read a full open throttle and open the EGR valve.  If this
occurs at idle, the broken vacuum kills the engine.  Since the throttle
position sensor is simply a potentiometer,t can get a dead spot at the position
of greatest wear, that is, the idle position.  So, I could temporarily repair
the problem by just loosening it with a screwdriver, twisting it a degree or so,
then tightening it.  The dead spot moved to a different location.

Now, however, I have another problem.  I don't know where this problem is
coming from.  The car has a standard shift and sometimes (but only sometimes)
when I coast to a stop from a long fast run, the engine dies.  This sometimes
happens when I get off the freeway, but it does not happen every time.  In fact,
if it happens once, it will usually not happen again in a day.  Thus, it is 
very difficult to diagnose.  In the past 3 weeks, it has happened 4 times.  Not
enough to repeat it, but enough to find it annoying.  No matter how I try, I
cannot duplicate it immediately afterwards.  Could it be the dashpot?  Too
simple?  Thanks.       Eric

Newsgroups: rec.autos.tech
Subject: one idle problem solved; one remains
Distribution: usa
Organization: ARCO Oil and Gas Company

I finally repaired that unpleasant problem that I asked for help on the net
some time ago.  (It was sufficiently complicated such that no one was able to
answer my post.)  Recapping, the engine would not keep running under idle
conditions.  I suspected the idle control motor, but someone at work suggested
that I look at the throttle position sensor first.  His rationale was that the
idle control motor never broke because of its design.  The throttle position
sensor, on the other hand, breaks easily.  If it malfunctions, the engine
control computer can read a full open throttle and open the EGR valve.  If this
occurs at idle, the broken vacuum kills the engine.  Since the throttle
position sensor is simply a potentiometer,t can get a dead spot at the position
of greatest wear, that is, the idle position.  So, I could temporarily repair
the problem by just loosening it with a screwdriver, twisting it a degree or so,
then tightening it.  The dead spot moved to a different location.

Now, however, I have another problem.  I don't know where this problem is
coming from.  The car has a standard shift and sometimes (but only sometimes)
when I coast to a stop from a long fast run, the engine dies.  This sometimes
happens when I get off the freeway, but it does not happen every time.  In fact,
if it happens once, it will usually not happen again in a day.  Thus, it is 
very difficult to diagnose.  In the past 3 weeks, it has happened 4 times.  Not
enough to repeat it, but enough to find it annoying.  No matter how I try, I
cannot duplicate it immediately afterwards.  Could it be the dashpot?  Too
simple?  Thanks.       Eric

Newsgroups: rec.autos.tech
Subject: idle problem solved, new problem
Distribution: usa
Organization: ARCO Oil and Gas Company

I finally repaired that unpleasant problem that I asked for help on the net
some time ago.  (It was sufficiently complicated such that no one was able to
answer my post.)  Recapping, the engine would not keep running under idle
conditions.  I suspected the idle control motor, but someone at work suggested
that I look at the throttle position sensor first.  His rationale was that the
idle control motor never broke because of its design.  The throttle position
sensor, on the other hand, breaks easily.  If it malfunctions, the engine
control computer can read a full open throttle and open the EGR valve.  If this
occurs at idle, the broken vacuum kills the engine.  Since the throttle
position sensor is simply a potentiometer,t can get a dead spot at the position
of greatest wear, that is, the idle position.  So, I could temporarily repair
the problem by just loosening it with a screwdriver, twisting it a degree or so,
then tightening it.  The dead spot moved to a different location.

Now, however, I have another problem.  I don't know where this problem is
coming from.  The car has a standard shift and sometimes (but only sometimes)
when I coast to a stop from a long fast run, the engine dies.  This sometimes
happens when I get off the freeway, but it does not happen every time.  In fact,
if it happens once, it will usually not happen again in a day.  Thus, it is 
very difficult to diagnose.  In the past 3 weeks, it has happened 4 times.  Not
enough to repeat it, but enough to find it annoying.  No matter how I try, I
cannot duplicate it immediately afterwards.  Could it be the dashpot?  Too
simple?  Thanks.       Eric

Newsgroups: rec.autos.tech
Subject: idle problem solved; one remains
Distribution: usa
Organization: ARCO Oil and Gas Company

I finally repaired that unpleasant problem that I asked for help on the net
some time ago.  (It was sufficiently complicated such that no one was able to
answer my post.)  Recapping, the engine would not keep running under idle
conditions.  I suspected the idle control motor, but someone at work suggested
that I look at the throttle position sensor first.  His rationale was that the
idle control motor never broke because of its design.  The throttle position
sensor, on the other hand, breaks easily.  If it malfunctions, the engine
control computer can read a full open throttle and open the EGR valve.  If this
occurs at idle, the broken vacuum kills the engine.  Since the throttle
position sensor is simply a potentiometer,t can get a dead spot at the position
of greatest wear, that is, the idle position.  So, I could temporarily repair
the problem by just loosening it with a screwdriver, twisting it a degree or so,
then tightening it.  The dead spot moved to a different location.

Now, however, I have another problem.  I don't know where this problem is
coming from.  The car has a standard shift and sometimes (but only sometimes)
when I coast to a stop from a long fast run, the engine dies.  This sometimes
happens when I get off the freeway, but it does not happen every time.  In fact,
if it happens once, it will usually not happen again in a day.  Thus, it is 
very difficult to diagnose.  In the past 3 weeks, it has happened 4 times.  Not
enough to repeat it, but enough to find it annoying.  No matter how I try, I
cannot duplicate it immediately afterwards.  Could it be the dashpot?  Too
simple?  Thanks.       Eric

Newsgroups: rec.autos.tech
Subject: idle problem solved, new problem
Distribution: usa
Organization: ARCO Oil and Gas Company

I finally repaired that unpleasant problem that I asked for help on the net
some time ago.  (It was sufficiently complicated such that no one was able to
answer my post.)  Recapping, the engine would not keep running under idle
conditions.  I suspected the idle control motor, but someone at work suggested
that I look at the throttle position sensor first.  His rationale was that the
idle control motor never broke because of its design.  The throttle position
sensor, on the other hand, breaks easily.  If it malfunctions, the engine
control computer can read a full open throttle and open the EGR valve.  If this
occurs at idle, the broken vacuum kills the engine.  Since the throttle
position sensor is simply a potentiometer,t can get a dead spot at the position
of greatest wear, that is, the idle position.  So, I could temporarily repair
the problem by just loosening it with a screwdriver, twisting it a degree or so,
then tightening it.  The dead spot moved to a different location.

Now, however, I have another problem.  I don't know where this problem is
coming from.  The car has a standard shift and sometimes (but only sometimes)
when I coast to a stop from a long fast run, the engine dies.  This sometimes
happens when I get off the freeway, but it does not happen every time.  In fact,
if it happens once, it will usually not happen again in a day.  Thus, it is 
very difficult to diagnose.  In the past 3 weeks, it has happened 4 times.  Not
enough to repeat it, but enough to find it annoying.  No matter how I try, I
cannot duplicate it immediately afterwards.  Could it be the dashpot?  Too
simple?  Thanks.       Eric

Newsgroups: rec.autos.tech
Subject: one idle problem solved; one remains
Distribution: usa
Organization: ARCO Oil and Gas Company

I finally repaired that unpleasant problem that I asked for help on the net
some time ago.  (It was sufficiently complicated such that no one was able to
answer my post.)  Recapping, the engine would not keep running under idle
conditions.  I suspected the idle control motor, but someone at work suggested
that I look at the throttle position sensor first.  His rationale was that the
idle control motor never broke because of its design.  The throttle position
sensor, on the other hand, breaks easily.  If it malfunctions, the engine
control computer can read a full open throttle and open the EGR valve.  If this
occurs at idle, the broken vacuum kills the engine.  Since the throttle
position sensor is simply a potentiometer,t can get a dead spot at the position
of greatest wear, that is, the idle position.  So, I could temporarily repair
the problem by just loosening it with a screwdriver, twisting it a degree or so,
then tightening it.  The dead spot moved to a different location.

Now, however, I have another problem.  I don't know where this problem is
coming from.  The car has a standard shift and sometimes (but only sometimes)
when I coast to a stop from a long fast run, the engine dies.  This sometimes
happens when I get off the freeway, but it does not happen every time.  In fact,
if it happens once, it will usually not happen again in a day.  Thus, it is 
very difficult to diagnose.  In the past 3 weeks, it has happened 4 times.  Not
enough to repeat it, but enough to find it annoying.  No matter how I try, I
cannot duplicate it immediately afterwards.  Could it be the dashpot?  Too
simple?  Thanks.       Eric

Newsgroups: rec.autos.tech
Subject: idle problem solved, new problem
Distribution: usa
Organization: ARCO Oil and Gas Company

I finally repaired that unpleasant problem that I asked for help on the net
some time ago.  (It was sufficiently complicated such that no one was able to
answer my post.)  Recapping, the engine would not keep running under idle
conditions.  I suspected the idle control motor, but someone at work suggested
that I look at the throttle position sensor first.  His rationale was that the
idle control motor never broke because of its design.  The throttle position
sensor, on the other hand, breaks easily.  If it malfunctions, the engine
control computer can read a full open throttle and open the EGR valve.  If this
occurs at idle, the broken vacuum kills the engine.  Since the throttle
position sensor is simply a potentiometer,t can get a dead spot at the position
of greatest wear, that is, the idle position.  So, I could temporarily repair
the problem by just loosening it with a screwdriver, twisting it a degree or so,
then tightening it.  The dead spot moved to a different location.

Now, however, I have another problem.  I don't know where this problem is
coming from.  The car has a standard shift and sometimes (but only sometimes)
when I coast to a stop from a long fast run, the engine dies.  This sometimes
happens when I get off the freeway, but it does not happen every time.  In fact,
if it happens once, it will usually not happen again in a day.  Thus, it is 
very difficult to diagnose.  In the past 3 weeks, it has happened 4 times.  Not
enough to repeat it, but enough to find it annoying.  No matter how I try, I
cannot duplicate it immediately afterwards.  Could it be the dashpot?  Too
simple?  Thanks.       Eric