2.0L LSJ Performance Tech 205hp Supercharged SS tuner version. 200 lb-ft of torque.

Cobalt ss starts and then shuts off

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Old Jan 14, 2020 | 09:17 PM
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vanno242's Avatar
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From: florida
Cobalt ss starts and then shuts off

Engine cranks and starts then dies!
So, i have an '05 cobalt ss/sc. My issue is that when I turn the key in the ignition the car cranks and then starts but then it idles roughly before dying. Even when I press the gas pedal it doesn't/barely responds to it. I've change the purge solenoid, zzp performance coil packs, cleaned the throttle body, changed the fuel lines (they were leaking), got a new maf sensor, new map sensor for the supercharger, I also got a new coolant temp sensor and map sensor that screws in right beneath the fuel rail off to the side.
*Sidenote*: The engine flutters like its struggling for air or fuel before it dies and I'd hear a popping sound from the muffler as it's trying to start. My next thought was to change the fuel filter. It's a brand new fuel pump assembly also.
Any suggestions??!
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Old Jan 15, 2020 | 08:32 AM
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jdbaugh1's Avatar
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From: Kansas
Originally Posted by vanno242
Engine cranks and starts then dies!
So, i have an '05 cobalt ss/sc. My issue is that when I turn the key in the ignition the car cranks and then starts but then it idles roughly before dying. Even when I press the gas pedal it doesn't/barely responds to it. I've change the purge solenoid, zzp performance coil packs, cleaned the throttle body, changed the fuel lines (they were leaking), got a new maf sensor, new map sensor for the supercharger, I also got a new coolant temp sensor and map sensor that screws in right beneath the fuel rail off to the side.
*Sidenote*: The engine flutters like its struggling for air or fuel before it dies and I'd hear a popping sound from the muffler as it's trying to start. My next thought was to change the fuel filter. It's a brand new fuel pump assembly also.
Any suggestions??!
Is your check engine light on and did the car run long enough to set any codes? I know you said you replaced MAF and MAP sensor but the symptoms you describe sound a lot like what happens when you unplug the MAF sensor. There's a possibility one of the new electrical components you put on was bad out the box and is giving you trouble or something happened during installation.
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