lotusuzu1991
New member
Hi everyone,
I'm the owner of a 2013 Sonic 1.4 that was bought new. It has been problem free until about 90,000 miles, when the check valve in the intake manifold failed and the coolant hose on the transmission side of the motor started leaking coolant on everything. I replaced the intake manifold with a new one, and the drivability returned to normal. Within 2000 miles I began to experience severe loss of power (I would actually have a little more power with the air conditioning ON), and so I began to go through this forum to find some answers. Fast forward several months, and I have replaced the following with new factory replacements: MAF sensor, MAP sensor, turbo assembly, throttle body, accelerator pedal position sensor, and the boost pressure sensors. I did not blindly replace all of these - I scanned the codes as I went and addressed them accordingly. I have also performed a leak check on the engine, and it is leak free. I am currently at this point: when I turn on the car it idles normally and does not exhibit any codes, although when I go to drive it it has so little power it'll actually stall as I'm letting off the clutch. I decided to film the action of the throttle body with the intercooler hose removed because I suspected the throttle body still was not working properly. When I turn on the ignition (not the engine) and press the accelerator pedal, the throttle body opens maybe 30% of the way, then back to idle position, with no position in between. It's like on/off. I tested the connections in the pigtail connector, and they're fine. I am completely at a loss at this point.
I am close to losing my job because I don't have other transportation and I can't afford to keep taking an Uber 40 miles every day, so I hope to goodness someone here might know what is going on. Please help!
I'm the owner of a 2013 Sonic 1.4 that was bought new. It has been problem free until about 90,000 miles, when the check valve in the intake manifold failed and the coolant hose on the transmission side of the motor started leaking coolant on everything. I replaced the intake manifold with a new one, and the drivability returned to normal. Within 2000 miles I began to experience severe loss of power (I would actually have a little more power with the air conditioning ON), and so I began to go through this forum to find some answers. Fast forward several months, and I have replaced the following with new factory replacements: MAF sensor, MAP sensor, turbo assembly, throttle body, accelerator pedal position sensor, and the boost pressure sensors. I did not blindly replace all of these - I scanned the codes as I went and addressed them accordingly. I have also performed a leak check on the engine, and it is leak free. I am currently at this point: when I turn on the car it idles normally and does not exhibit any codes, although when I go to drive it it has so little power it'll actually stall as I'm letting off the clutch. I decided to film the action of the throttle body with the intercooler hose removed because I suspected the throttle body still was not working properly. When I turn on the ignition (not the engine) and press the accelerator pedal, the throttle body opens maybe 30% of the way, then back to idle position, with no position in between. It's like on/off. I tested the connections in the pigtail connector, and they're fine. I am completely at a loss at this point.
I am close to losing my job because I don't have other transportation and I can't afford to keep taking an Uber 40 miles every day, so I hope to goodness someone here might know what is going on. Please help!
