My MX5 usually idles at about 700 to 800 RPM. Whilst driving and pulling to a
stop the RPM drops to about 1500 and then over a few seconds slowly drops to
700- 800 rpm. (AC is off) Has anyone any idea why the slow return to idling
speed when stopped ?
TIA
[...]
RPM
RPM
On Wed, 14 Apr 2004 20:19:51 +1200, you wrote:
Thanks Stu. I'll try that.Col
I have had a similar problem with my work van. Found it to be a combination
of a dirty Accelerator cable and throttle body assembly where accelerator
cable attaches.Clean them an it should return to normal. I found CRC silicon
spray works well.
Stu
RPM
On Wed, 14 Apr 2004 20:19:51 +1200, you wrote:
Symptom
On stopping the RPM counter drops to 1200- 1500 RPM for 6 or 7 seconds then
slowly drops to 750-800 (my normal idle speed ).
Any comments ?
[...]
Looked at that . The 1800 motor is controlled electronically.Col
I have had a similar problem with my work van. Found it to be a combination
of a dirty Accelerator cable and throttle body assembly where accelerator
cable attaches.Clean them an it should return to normal. I found CRC silicon
spray works well.
Stu
Symptom
On stopping the RPM counter drops to 1200- 1500 RPM for 6 or 7 seconds then
slowly drops to 750-800 (my normal idle speed ).
Any comments ?
[...]
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- Keep calm, Forum Moderator here.
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RPM
There are two possible causes.
1) your throttle damping valve is incorrectly
adjusted.(it looks like a gold diaphram assembly with
a rod that touches the accelerator linkage. its sort
of a shock absorber that softens the transition to the
closed position..If its adjusted so it comes in to
early then you accelerator wiil be slow to re seat
back to idle position. operate your throttle body
linkage by hand to rev the engine and watch what happens when you let it go.
The other possible cause is that your idle control
valve may have carbon deposits in it and needs
cleaning out. youll need to take off your ntake pipe
just before the throttke body, and spray it with
cleaner. Also clean around the main throttle body
butterfly with a CLEAN rag while your there.
1) your throttle damping valve is incorrectly
adjusted.(it looks like a gold diaphram assembly with
a rod that touches the accelerator linkage. its sort
of a shock absorber that softens the transition to the
closed position..If its adjusted so it comes in to
early then you accelerator wiil be slow to re seat
back to idle position. operate your throttle body
linkage by hand to rev the engine and watch what happens when you let it go.
The other possible cause is that your idle control
valve may have carbon deposits in it and needs
cleaning out. youll need to take off your ntake pipe
just before the throttke body, and spray it with
cleaner. Also clean around the main throttle body
butterfly with a CLEAN rag while your there.
RED '90 TURBO.
SCARING PRIUS DRIVERS SINCE 2002
SCARING PRIUS DRIVERS SINCE 2002
RPM
On Thu, 15 Apr 2004 05:56:28 +0100 (BST), you wrote:
[...]
Thanks Glenn . I will look at those .There are two possible causes.
1) your throttle damping valve is incorrectly
adjusted.(it looks like a gold diaphram assembly with
a rod that touches the accelerator linkage. its sort
of a shock absorber that softens the transition to the
closed position..If its adjusted so it comes in to
early then you accelerator wiil be slow to re seat
back to idle position. operate your throttle body
linkage by hand to rev the engine and watch what
happens when you let it go.
The other possible cause is that your idle control
valve may have carbon deposits in it and needs
cleaning out. youll need to take off your ntake pipe
just before the throttke body, and spray it with
cleaner. Also clean around the main throttle body
butterfly with a CLEAN rag while your there.
[...]
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