No crank no start help?
Asked by GuruGSWSF Aug 26, 2020 at 03:23 PM about the 2009 Chevrolet Cobalt LS Coupe FWD
Question type: Maintenance & Repair
I have an 09 cobalt was leaving work turned key no
crank no start all lights work and radio works tried
to jump it and nothing happened had a mechanic
come and replace starter still no crank no start had
ignition switch changed still nothing had battery
changed still nothing changed the relay still nothing
had a diagnostic run no codes came up I never had
the check engine light come on or battery light and
at this point I’m at a loss for ideas someone please
help
7 Answers
Well the starting system on this car is pretty conplicated... the bcm provides power to the ignition switch which is watchin for a crank signal. Then bcm then tells the pcm and it checks the status of the transmission range switch and power side switches the crank relay.. u cld try removing the crank relay and jumping the load side terminals together and see of itll turn over
Issues can vary pretty far from missing power feeds to the modules involved, communication line problems between modules, breaks/cut wires
Bcm? Wires and ground cables were checked
I have a 2007 chevy colbalt that I let sit for 2 days and it was still is my daily driver if I can figure it out but its been a week and I'm still sitting here with no crank no start I checked the cpp sensor even tried to bypass it well putting a jumper wire in the plug nothing notta happened so put it back together went to the fuse box under the hood tried to bypass the crank relay you number 30 and 87 I believe with a jumper wire and still wont turn over but we could jump the solenoid on the starter its self with a screwdriver it would turn over then but damn security light came on but it's off now anyways starter tested good at o'Reilly auto battery has 13 something volts good so I replaced the ground cable ends the ones on the bolt that go to tranny housing then the others on back of the head come back started testing my fuses again now only half of my fuse box works and I'm stuck like wth I'm totally mind blown I just need a stick of dynamite or something
Buddyboydog answered 4 months ago
I have a 09 chevy cobalt 2.2 no crank replaced timing chain fuel pump throttle body fusebox ecm programed to my vin cam and crank sensors did compression test 2 cylinders have 180 other 2 have 200 did a fuel pressure test its between 45 50 I'm getting fuel to the rail but not out the injectors I can jump the crank relay it turns over but no crank if I spray starting fluid it starts for a few when I jump relay everything in car works as it should need help
