Hello all. It's been a while....(too long perhaps?)
I'm having an issue with a 2007 G5 GT (basically a Cobalt). It has the 2.4 litre Ecotec. I replaced the motor (65K miles) about a month ago. Prior to the engine replacement, the car started without any issues. Since the new motor, I have had issues trying to get the starter to enguage. You can hear the starter spinning, but it wont engauge with the flexplate. I did paint the new motor (it was too nice not to), but I masked off a number of areas, including the area where the starter goes into the engine block and where the grounds all connected to.
I've checked and double checked all the grounds. They are all clean (now exceptionally clean). I've made new ground wires, and have been through this car several times.
I did check the distance from the engine block to the furthest edge of the flex plate. Then coompared this to where starter bendix stopper is,to where the starter mounts to the engine block. The starter bendix will / should be able to come out and engauge the flex plate fully.
I can get the flex plate to turn, using a pry bar.
When you try to start the car, theDriver Info. on the cluster says "Reduced Eng Pwr".
CEL Code are:
- P0122 (Throttle Position Sensor Circuit A low voltage)
- P1223 (throttle Position Sensor Circuit B low input)
Other things I've done:
1). Had the battery checked ...it was O.K.. It did state the battery was in the last 1/4 of life.
I then....
2). Tried hooking up a car jump starter...
--- hooked this up under the hood, using the factory positive post and the (-) ground. --> didn't change anything / starter still wouldn't engauge.
--- then tried hooking the jump starter to the battery posts (batery is in the trunk). ---> didn't change anything / starter still wouldn't engauge
3). Bought a new starter. When I inspected it real close, there was a piece glued back onto the solenoid.
--- I thought this could have led to or caused damage to the solenoid ...still wouldn't engauge.
4). I went throught ALL the ground points, re-cleaned / sanded and used just a little bit of dielectric grease to help with the contacts. ...no change.
5). I made 2 new ground wires. One goes from TCM to a factory ground point.
--- This helped, and now the doors automatically lock when you turn the key ..car still wont start
6). I made a new ground which goes from the head to the firewall. ...car still will not start.
7). I removed the fuse panel coolant resivoir and looked to see if the factory ground under there was clean.
--- It was, but I recleaned, used dielectric grease on the contact points. ...starter still spins / wont engauge.
I can't think of anything else to try. The only thing I can think of now is, because the battery checked out O.K., but is old; I'm probably going to just replace that.
Does ANYONE else have any ideas???
I guess I should also add, though the car is in park, the front wheels spin. I did use a vacuum bleeder to suck some of the fluid out of one of the tubes, when the engine and trans were out of the car.
I'm having an issue with a 2007 G5 GT (basically a Cobalt). It has the 2.4 litre Ecotec. I replaced the motor (65K miles) about a month ago. Prior to the engine replacement, the car started without any issues. Since the new motor, I have had issues trying to get the starter to enguage. You can hear the starter spinning, but it wont engauge with the flexplate. I did paint the new motor (it was too nice not to), but I masked off a number of areas, including the area where the starter goes into the engine block and where the grounds all connected to.
I've checked and double checked all the grounds. They are all clean (now exceptionally clean). I've made new ground wires, and have been through this car several times.
I did check the distance from the engine block to the furthest edge of the flex plate. Then coompared this to where starter bendix stopper is,to where the starter mounts to the engine block. The starter bendix will / should be able to come out and engauge the flex plate fully.
I can get the flex plate to turn, using a pry bar.
When you try to start the car, theDriver Info. on the cluster says "Reduced Eng Pwr".
CEL Code are:
- P0122 (Throttle Position Sensor Circuit A low voltage)
- P1223 (throttle Position Sensor Circuit B low input)
Other things I've done:
1). Had the battery checked ...it was O.K.. It did state the battery was in the last 1/4 of life.
I then....2). Tried hooking up a car jump starter...
--- hooked this up under the hood, using the factory positive post and the (-) ground. --> didn't change anything / starter still wouldn't engauge.
--- then tried hooking the jump starter to the battery posts (batery is in the trunk). ---> didn't change anything / starter still wouldn't engauge
3). Bought a new starter. When I inspected it real close, there was a piece glued back onto the solenoid.
--- I thought this could have led to or caused damage to the solenoid ...still wouldn't engauge.
4). I went throught ALL the ground points, re-cleaned / sanded and used just a little bit of dielectric grease to help with the contacts. ...no change.
5). I made 2 new ground wires. One goes from TCM to a factory ground point.
--- This helped, and now the doors automatically lock when you turn the key ..car still wont start
6). I made a new ground which goes from the head to the firewall. ...car still will not start.
7). I removed the fuse panel coolant resivoir and looked to see if the factory ground under there was clean.
--- It was, but I recleaned, used dielectric grease on the contact points. ...starter still spins / wont engauge.
I can't think of anything else to try. The only thing I can think of now is, because the battery checked out O.K., but is old; I'm probably going to just replace that.
Does ANYONE else have any ideas???
I guess I should also add, though the car is in park, the front wheels spin. I did use a vacuum bleeder to suck some of the fluid out of one of the tubes, when the engine and trans were out of the car.
?‍
