BlackBourbon
1/2 ton status
'87 TBI350-started having a seriously crappy idle one day last week. Stumbling and dying if I didn't hold a little throttle.
I started with the plugs/wires. My rear two plugwires on the pass side were burnt through at the boots so I ordered a brand new set of Taylor wires and swapped in some new plugs. Runs smoother now than it did but didn't cure the problem Once warm and idle kicks down it stumbles and will die.
It drives fine on the highway but at idle it has a pfft-pfft sound right around the pass side exhaust mani. It may be a cracked manifold but can't tell cuz the heat shield all around it. It doesn't backfire or anything. I also don't think an exhaust leak would cause it to have a stumbled idle.
Noise is def coming from that side only. The cap terminals looked fine when I swapped plugwires. If the coil/cap was crappin out it would probably misfire on different cylinders and drive way worse.
It may be a combo of things. Maybe a vac leak for the idle and exhaust leak for the sound? I pulled the line off that goes from the intake to a tee and then to cruise control stuff and it kicked the idle up but didn't help it run any better.
It just seems to be running on 1 less cylinder to me at idle? Any ideas?
I started with the plugs/wires. My rear two plugwires on the pass side were burnt through at the boots so I ordered a brand new set of Taylor wires and swapped in some new plugs. Runs smoother now than it did but didn't cure the problem Once warm and idle kicks down it stumbles and will die.
It drives fine on the highway but at idle it has a pfft-pfft sound right around the pass side exhaust mani. It may be a cracked manifold but can't tell cuz the heat shield all around it. It doesn't backfire or anything. I also don't think an exhaust leak would cause it to have a stumbled idle.
Noise is def coming from that side only. The cap terminals looked fine when I swapped plugwires. If the coil/cap was crappin out it would probably misfire on different cylinders and drive way worse.
It may be a combo of things. Maybe a vac leak for the idle and exhaust leak for the sound? I pulled the line off that goes from the intake to a tee and then to cruise control stuff and it kicked the idle up but didn't help it run any better.
It just seems to be running on 1 less cylinder to me at idle? Any ideas?
