Thread: 98 sw2
View Single Post
  #4  
Old 11-08-2010, 04:43 PM
Ruley73's Avatar
Ruley73 Ruley73 is offline
AF Enthusiast
 
Join Date: Apr 2004
Posts: 568
Thanks: 0
Thanked 31 Times in 30 Posts
Re: 98 sw2

Quote:
Originally Posted by xdanx25 View Post
Before I check the temp sensor- I'd like to give a more detailed description of the symptom- and there's only one. Before the temp gauge comes up, the accelerator operates smoothly. As soon as it rises, about 1/5th of the gauge, what happens is, whenever the accelerator pedal is depressed from foot-off-the-pedal to just past the slightest foot pressure, there is a short stall. I can stuff my foot into it, and it will get past that bog and jump forward. I can feather the pedal and make a series of mini-stalls, if I try to hold the pedal in just the exact stall position. This occurs at any speed. Take foot off pedal, the depress it just a bit past slightly, and I get a 'cough'- like a quick buck. It doesn't repeat it, unless I let off the accelerator again, and move it past that sensitive position. If the car is under load, like, I'm headed uphill, at a stop, or if the air is on, then, I MUST press the pedal past this problem position smartly, or else the bog kicks hard enough to stall the engine., from idling.
Now, this only happens when the pedal is pushed down, never when it is released. But what triggers the quick buck, or stall, is the position of the accelerator. I've checked the vacuum, replaced the wires and plugs, cleaned out any carbon build up. I had a scope hooked up, and it threw a code from memory, just said,'stall detected', but no more detail.

If this doesn't change your thoughts about the temp sensor, I'll go right out and change it. Because it seems to be related to the temp, it makes sense, but I wanted to give more specific data, in case this is some oddity you've seen before.
It appears as though you may have a bad throttle position sensor. If it is bucking like that though I'm surprised the SES light isn't on.
__________________
My rides:
2007 Chevy Equinox LT FWD
2018 Chrysler Pacifica Touring L

"If women don't find you handsome, they should at least find you handy!"
- Steve Smith (Red)
Reply With Quote