Benswen
02/09/2005, 02:36 PM
Man, it's been awhile since I posted here, but as soon as I need help I come crawling back... :D
So here's the deal. 94PGT, 98K, MTX, well maintained drivetrain/suspension (lot's of important parts replaced in the last 6k) but I'm having a strange problem. When I've been driving the car for more than 7-8 miles (basically when the car is fully warmed-up) I get an intermittent shaking and loss of power when I give it throttle, and I can hear that the motor is misfiring. The strange thing is that it will sometimes quit for awhile and drive smoothe, no loss of power, and then a short time later (while just cruising down the highway) I can feel it get progressively rougher, to where the interior pieces are rattling from the shaking. This used to happen (for the last several months) very rarely, and I just wrote it off to the Probe gremlins screwing with me, but now it happens all the time after the first few miles.
I'm sure it's not related to the suspension/transmission/driveline, as it's so intermittent. I'm thinking it's the all-too-common ignitor failure, and that's why it doesn't happen when the car is cold, or when there's no real load on the motor (at idle) and it's shaking because I have front and rear RR-Racing motor mount inserts, which transfers the vibration from the motor to the rest of the car. I'm thinking about giving the HEI mod a shot, but as it's irreversible, I want to be sure before I go ahead with it. The car is in need of new plugs/wires/cap/rotor, but that should cause poor performance all around, not just occasionally.
I've searched (PT, P-E and here) but most people report no vibration or shaking with ignitor failure, just a total loss of spark - stalling or not starting. Any input?
So here's the deal. 94PGT, 98K, MTX, well maintained drivetrain/suspension (lot's of important parts replaced in the last 6k) but I'm having a strange problem. When I've been driving the car for more than 7-8 miles (basically when the car is fully warmed-up) I get an intermittent shaking and loss of power when I give it throttle, and I can hear that the motor is misfiring. The strange thing is that it will sometimes quit for awhile and drive smoothe, no loss of power, and then a short time later (while just cruising down the highway) I can feel it get progressively rougher, to where the interior pieces are rattling from the shaking. This used to happen (for the last several months) very rarely, and I just wrote it off to the Probe gremlins screwing with me, but now it happens all the time after the first few miles.
I'm sure it's not related to the suspension/transmission/driveline, as it's so intermittent. I'm thinking it's the all-too-common ignitor failure, and that's why it doesn't happen when the car is cold, or when there's no real load on the motor (at idle) and it's shaking because I have front and rear RR-Racing motor mount inserts, which transfers the vibration from the motor to the rest of the car. I'm thinking about giving the HEI mod a shot, but as it's irreversible, I want to be sure before I go ahead with it. The car is in need of new plugs/wires/cap/rotor, but that should cause poor performance all around, not just occasionally.
I've searched (PT, P-E and here) but most people report no vibration or shaking with ignitor failure, just a total loss of spark - stalling or not starting. Any input?