Draggining noise at start up
Thread Starter
Racer
Joined: Jul 2011
Posts: 265
Likes: 77
From: chicagoland il
Draggining noise at start up update
Whenever I start the car up, I hear what appears to be the rear brakes dragging. After driving a mile or so, the noise disappears. I read that at start up the abs brakes go thru their routine...Also get a one note high pitch whistling sound from the engine compartment at times.
Within the last 12k miles, had new rear brakes, both rear hubs, new dual mass clutch, oil pan gasket, timing chain, intake manifold, new alternator. Coolant flushed, oil changed with the pan gasket service, I assume trans service with the clutch. Only fluid not changed is the differntial. There is some grease build up on the differential, but no leaks; prior owner may have changed.
Just today the check engine lite popped on. First cold day of the year and maybe my shift was not smooth. Will see if lites turn off in a few days.
Within the last 12k miles, had new rear brakes, both rear hubs, new dual mass clutch, oil pan gasket, timing chain, intake manifold, new alternator. Coolant flushed, oil changed with the pan gasket service, I assume trans service with the clutch. Only fluid not changed is the differntial. There is some grease build up on the differential, but no leaks; prior owner may have changed.
Just today the check engine lite popped on. First cold day of the year and maybe my shift was not smooth. Will see if lites turn off in a few days.
Last edited by rosros; Nov 29, 2011 at 10:59 PM. Reason: fixed problem
Thread Starter
Racer
Joined: Jul 2011
Posts: 265
Likes: 77
From: chicagoland il
Took the car to Auto Tech...good bunch and really honest.
The dragging noise was the brakes. Film build up quickly on these rotors. The rear differential is fine, but the fill plug was seeping, but no drips. . Had them change the fluid and they resealed the threads.
The 'service engine' light showed two codes...misfire and map sensor circuit. Shop found prior repair job on the wiring to the Manifold absolute pressure sensor. Zip ties holding the repair together. The wires were shorting intermittently, but redundant circuitry masked the problem until the recent cold spell hit. Sensor was weak with dropping voltage. They replaced the sensor and put in GM pigtail. Codes cleared and car running fine.
The dragging noise was the brakes. Film build up quickly on these rotors. The rear differential is fine, but the fill plug was seeping, but no drips. . Had them change the fluid and they resealed the threads.
The 'service engine' light showed two codes...misfire and map sensor circuit. Shop found prior repair job on the wiring to the Manifold absolute pressure sensor. Zip ties holding the repair together. The wires were shorting intermittently, but redundant circuitry masked the problem until the recent cold spell hit. Sensor was weak with dropping voltage. They replaced the sensor and put in GM pigtail. Codes cleared and car running fine.
