Yet Another Throttle Potentiometer Thread!
#1
Yet Another Throttle Potentiometer Thread!
Ok, so I've been experiencing some unusual power loss, an occasional stall out and some noticeable engine shudder at 55mph.
I hooked the car up to my laptop and I started graphing (a) coolant temperature, (b) MAF air temperature, (c) throttle position and I forget, something else.
I was basically trying to determine whether or not the TPS, or the CTS, or the MAF sensor was flaking out on me. When I drove in to work, of course everything seemed fine. I ran an errand midday and of course, everything was still fine. But on the way home from work is when the magic started.
The graph on the throttle position started to flake out. I would be keeping a steady gas pedal but i started seeing peaks and valleys. The other three screens were all smooth.
It must be the TPS, right? Is there anything else worth checking? Anything else that can be causing this?
I do want to add that I removed the throttle body and gave it a thorough cleaning, on both sides of the butterfly, so I know that is clean.
Thanks!
I hooked the car up to my laptop and I started graphing (a) coolant temperature, (b) MAF air temperature, (c) throttle position and I forget, something else.
I was basically trying to determine whether or not the TPS, or the CTS, or the MAF sensor was flaking out on me. When I drove in to work, of course everything seemed fine. I ran an errand midday and of course, everything was still fine. But on the way home from work is when the magic started.
The graph on the throttle position started to flake out. I would be keeping a steady gas pedal but i started seeing peaks and valleys. The other three screens were all smooth.
It must be the TPS, right? Is there anything else worth checking? Anything else that can be causing this?
I do want to add that I removed the throttle body and gave it a thorough cleaning, on both sides of the butterfly, so I know that is clean.
Thanks!
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Have a CAREFUL look at the actual camcover itself.
Pay particular attention to the spigots that form the spark plug tubes. There has been reports of that section being porous, and no amount of seals etc will stop the ingress of oil into the wells.
Have a read/search on the X300 section, as that is where I reckon I read it.
The consensus seems to pount at teh Magnesium in teh casting reacting with the ignition coils "field" or something.
My X300 is very rough inside those tubes, but not porous at all.
Pay particular attention to the spigots that form the spark plug tubes. There has been reports of that section being porous, and no amount of seals etc will stop the ingress of oil into the wells.
Have a read/search on the X300 section, as that is where I reckon I read it.
The consensus seems to pount at teh Magnesium in teh casting reacting with the ignition coils "field" or something.
My X300 is very rough inside those tubes, but not porous at all.
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