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Re.: RPM Fluctuating Up and Down???

Francois DesCotes
*

forum user since 2008-01-05

 

Edited on 2012-01-01 0:21:24

Hello!

I have a 2004 XJ8 and the RPM keeps going up and down, with a noticeable pull when it is up. It is as if I were to constantly push and pull back on the gas pedal.

I chaged the throttle body, knowing that it is a know problem with this model, but it is still doing it.

Anybody have that happen before?

Thank you greatly for your help!


Ben Savard
2004 XJ8
"I'd rather have a bottle in front of me than a frontal lobotomy."

RPM Fluctuating Up and Down???

Steven Petry
Jaguar Association of Greater Indiana *

forum user since 2007-02-03

 

Did you disconnect the battery after the throttle body replacement?? That has to be done so the system can initialize itself. That also has to be done following a throttle bore cleaning, etc. since that changes the base air around the throttle butterfly.

Cheers,

S Petry
'95 XJR
'97 XK8 Conv.

RPM Fluctuating Up and Down???

Ben Savard
*

forum user since 2008-01-05

 

I did not know that! I will try it.

I will report back with the result.

Thanks!

Ben Savard
2004 XJ8
"I'd rather have a bottle in front of me than a frontal lobotomy."

RPM Fluctuating Up and Down???

Steven Petry
Jaguar Association of Greater Indiana *

forum user since 2007-02-03

 

Gee, I didn't notice at first, but you have one of my motto's in your signature.......

I've known it as "I'd rather have a bottle in front of me; instead of a frontal lobotomy!

Absolutely words to live by!!


Cheers,

S Petry
'95 XJR
'97 XK8 Conv.

RPM Fluctuating Up and Down???

Ben Savard
*

forum user since 2008-01-05

 

Gents,

The dang beast is still doing the same thing. Disconnected the battery for a few hours, replaced the throttle body.

Could it possibly be the gas pedal? I saw a YouTube with a gentleman who had to replace the gas pedal when he thought it was the throttle body all along.

How does the gas pedal work? I didn't see a cable, so I am assuming that this is fly-by-wire.

Does that make any sense?

Thanks for your help!

Ben Savard
2004 XJ8
"I'd rather have a bottle in front of me than a frontal lobotomy."

RPM Fluctuating Up and Down???

Ben Savard
*

forum user since 2008-01-05

 

Crickets... :-)

Ben Savard
2004 XJ8
"I'd rather have a bottle in front of me than a frontal lobotomy."