01-05-2014, 03:41 AM
My "new" '97 Sport is a real beauty with 101k. Interior shows no signs of wear, exterior has a little bit of hanger rash. Came with new tires, battery, brakes.
I'm looking at some issues, the first of which is the throttle.
#1, after sitting over night (at 50 - 60 degrees air temp) it takes quite a bit of force to press the pedal past some obstruction. Once it "snaps" past the problem, it's fine all day. I've eliminated the pedal mechanism and the cables. I looked at the butterfly and don't see any gunk making it stick. I've lubed the cam with lithium grease and sprayed the external spring and shaft with WD-40.
I don't know if they're related, but #2 is a hesitation in throttle response. It seems to mostly happen when I decelerate to a stop or near stop, then immediately get back on the throttle. If I stop for a full second or so then go, it usually doesn't hesitate.
It also is slow to respond to load at idle. When the A/C cycles or it is shifted into gear from neutral or park, the idle first drops to a rough idle then recovers in a second or so most of the time. Sometimes it will stay down longer.
Since I don't know what's been done to the engine, I'm going to replace the upstream O2 sensor and clean the EGR so I know where they stand. The stat is good with IR gun reading 170 - 180 on the housing.
I'm looking at some issues, the first of which is the throttle.
#1, after sitting over night (at 50 - 60 degrees air temp) it takes quite a bit of force to press the pedal past some obstruction. Once it "snaps" past the problem, it's fine all day. I've eliminated the pedal mechanism and the cables. I looked at the butterfly and don't see any gunk making it stick. I've lubed the cam with lithium grease and sprayed the external spring and shaft with WD-40.
I don't know if they're related, but #2 is a hesitation in throttle response. It seems to mostly happen when I decelerate to a stop or near stop, then immediately get back on the throttle. If I stop for a full second or so then go, it usually doesn't hesitate.
It also is slow to respond to load at idle. When the A/C cycles or it is shifted into gear from neutral or park, the idle first drops to a rough idle then recovers in a second or so most of the time. Sometimes it will stay down longer.
Since I don't know what's been done to the engine, I'm going to replace the upstream O2 sensor and clean the EGR so I know where they stand. The stat is good with IR gun reading 170 - 180 on the housing.