very strange behaviour - 993 accelerator
very strange behaviour - 993 accelerator
Author
Discussion

tertius

Original Poster:

6,914 posts

259 months

Thursday 1st December 2005
quotequote all
Whilst driving my 993 (standard C2) yesterday I experienced some very peculiar throttle/accelerator pedal bahviour.

Its pretty hard to describe but it was as if the accelerator pedal was pulsing under my foot, rather like a brake pedal when ABS has kicked in, except it was much less regular and not at all predictable.

It happened a few times and each time lasted for a few seconds (say 1-3 secs).

The only difference I can think of that is throttle/fuel related is that I filled up with Tesco 99 RON for the first time yesterdsay (91.1p!), the previous tank was Optimax.

Anyone got any ideas?

thanks

Dan

verysideways

10,268 posts

301 months

Thursday 1st December 2005
quotequote all
D'oh!!!
Dan, not sure what would have any effect on the throttle pedal apart from a traction control system (not applicable in your 993) or cruise control (which if you don't have is also not applicable at all).
Have you tried squirting some WD40 or GT85 down the cable sleeve? Could the throttle cable be sticking in the sleeve and hence being jerky when you try and change pedal position?

tertius

Original Poster:

6,914 posts

259 months

Thursday 1st December 2005
quotequote all
Cheers VS.

No, I haven't tried anything yet. It was dark when I got home ... aah. So I just put her away and relied on the PH massive to provide the answer.

It was most odd. To be honest if felt more "active" than the cable sticking. Hey ho.

Dan

BliarOut

72,863 posts

268 months

Thursday 1st December 2005
quotequote all
Tip or manual?

tertius

Original Poster:

6,914 posts

259 months

Thursday 1st December 2005
quotequote all
Manual.

nel

4,830 posts

270 months

Thursday 1st December 2005
quotequote all
Yep - agree with VS. As the throttle system on a 993 is just a simple cable opening a butterfly unlike the modern fly by wire jobbies, logically the only thing that could give an "active" feeling to the pedal would be the actuator of the cruise control. Is your car equipped with this system?

tertius

Original Poster:

6,914 posts

259 months

Thursday 1st December 2005
quotequote all
nel said:
Yep - agree with VS. As the throttle system on a 993 is just a simple cable opening a butterfly unlike the modern fly by wire jobbies, logically the only thing that could give an "active" feeling to the pedal would be the actuator of the cruise control. Is your car equipped with this system?


Not unless its very well hidden.

nel

4,830 posts

270 months

Thursday 1st December 2005
quotequote all
tertius said:
nel said:
Yep - agree with VS. As the throttle system on a 993 is just a simple cable opening a butterfly unlike the modern fly by wire jobbies, logically the only thing that could give an "active" feeling to the pedal would be the actuator of the cruise control. Is your car equipped with this system?


Not unless its very well hidden.


Then at a loss completely!! Are you sure that your boxer shorts aren't too tight and thus causing nervous spasms in your right leg?

Kananga

1,171 posts

185 months

Wednesday 17th August 2016
quotequote all
I realise this is a bit of a thread resurrection, but wondering if anyone has any thoughts on this issue ?

My car does have cruise and the accelerator has begun the pulsing when cruise is activated. Any thoughts ? Faulty actuator ?