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Subject Z is bucking hard on interstate
     
Posted by TReedsZ on October 16, 2011 at 7:10 AM
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Message Hey Guys,

I took my Z out for a drive on 95. Was running Great. I was about 10 miles into the drive when I pushed on the gas to get around a slower car. When I let off the gas to slow down, the car started to buck. It scared the crap out of me. I slowed down and it was acting like it wanted to shut off, so I pulled over. It would run, but the idle was up and down. After a few min of sitting, it went away. I thought it might be bad gas, bc it was at 1/4 tank. Drove to the gas station and filled up with 93. No problems until I got back on 95. I made a hard pull in 4th and again when I let off and got back on the gas, the same thing happened. I stopped again and checked for vac leaks.
It's like there is a power problem, but I check all coil and inj connections. ALL plugged in. After a few min again, started to idle fine. The rest of the way home, I kept the car under 3k rpm and took it easy. No more hard bucking. WHen I got home I turned the car off and ran in the garage to grab a flash light to look under the car for any wires or leaks. I started the car back up and the belt started to squeal and the car was again running crappy. A min later it started to run fine again.
Things I've checked and replaced -
New fuel filter
New NGK plugs
Alternator
Belts

Any ideas? I don't know what it could be.
Thanks



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