I got a 1990 Grand Marquis a couple years ago, so I'm still relatively new to it.
Back in December, it was flashing the Check Engine light on the highway, so I took it in and they replaced the TPS. After I picked it back up, it began to give me hesitation when accelerating from a stop. In the following weeks, that began to get a bit better until one day when I come back I notice a sulfur smell coming from the left rear of the car (probably the catalytic converter's done).
When the catalytic converter started doing that, there was also a rattling coming from the front of the car (kind of like when shifting gears on a bike) when accelerating to highway speeds. It would stop after a few seconds of getting up to speed, but every drive I've taken on, it has gotten worse. Now, it rattles pretty loudly when going from 55-60 mph, and 35-40 mph. It stops after it shifts usually, but now it's happening whenever accelerating up hills or on the highway. Keep in mind that this is only over about 5-8 drives.
The mechanic told me that the transmission might need to be rebuilt, but I'm not sure if the rattling is related to the catalytic converter in any way, since they both started happening at the same time. Back in November when I took it in for another issue, the transmission was in decent shape.
None of these issues were happening until I picked it up from the mechanic after the TPS was replaced.
Extra info: It's consistently below freezing this time of year around here, and last winter I hardly took it out because it wasn't inspected.
Back in December, it was flashing the Check Engine light on the highway, so I took it in and they replaced the TPS. After I picked it back up, it began to give me hesitation when accelerating from a stop. In the following weeks, that began to get a bit better until one day when I come back I notice a sulfur smell coming from the left rear of the car (probably the catalytic converter's done).
When the catalytic converter started doing that, there was also a rattling coming from the front of the car (kind of like when shifting gears on a bike) when accelerating to highway speeds. It would stop after a few seconds of getting up to speed, but every drive I've taken on, it has gotten worse. Now, it rattles pretty loudly when going from 55-60 mph, and 35-40 mph. It stops after it shifts usually, but now it's happening whenever accelerating up hills or on the highway. Keep in mind that this is only over about 5-8 drives.
The mechanic told me that the transmission might need to be rebuilt, but I'm not sure if the rattling is related to the catalytic converter in any way, since they both started happening at the same time. Back in November when I took it in for another issue, the transmission was in decent shape.
None of these issues were happening until I picked it up from the mechanic after the TPS was replaced.
Extra info: It's consistently below freezing this time of year around here, and last winter I hardly took it out because it wasn't inspected.
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