Need a little help. My mom has an 07 cobalt that will start and then stall immediately after. the other day I decided to blow 50 PSI into the fuel rail and the car started immediately, but once it was shut off again, then the start and stall began again until I introduced the air into the fuel rail again. Does anyone know what this means? Fuel pressure regulator maybe?
07 Cobalt starts then stalls after 1 second
- Thread starter psmith
- Start date
There is no fuel pressure regulator as the cobalt uses a returnless fuel rail, meaning that fuel pressure is controlled by the fuel pump. Guessing you aren't getting full pressure at the rail caused by either a bad pump or something clogging the fuel line.
So in your position I would first ensure the pump is working, turn the key from OFF to ON and you should hear a whine/pump noise coming from the fuel tank for about 3-4 seconds.
Second I would replace the fuel filter, just follow this: http://www.chevycobaltforum.com/forum/f24/how-fuel-filter-change-95/
If that doesn't fix it you could try reverse pressurizing the fuel line with the fuel filter disconnected to blow whatever may be stuck in the line out.
Give that a try and let us know how it turns out.
So in your position I would first ensure the pump is working, turn the key from OFF to ON and you should hear a whine/pump noise coming from the fuel tank for about 3-4 seconds.
Second I would replace the fuel filter, just follow this: http://www.chevycobaltforum.com/forum/f24/how-fuel-filter-change-95/
If that doesn't fix it you could try reverse pressurizing the fuel line with the fuel filter disconnected to blow whatever may be stuck in the line out.
Give that a try and let us know how it turns out.
Why then
Why then does it list one when you do a search for a fuel pressure regulator at a parts store and shows a picture of it. ANd after it starts, it runs perfectly unitl I shut it off again. I drove it Saturday about 50 miles and it ran great. By the way, I've already replaced the fuel filter and removed the tank and blew the lines out while I had the filter off.
Why then does it list one when you do a search for a fuel pressure regulator at a parts store and shows a picture of it. ANd after it starts, it runs perfectly unitl I shut it off again. I drove it Saturday about 50 miles and it ran great. By the way, I've already replaced the fuel filter and removed the tank and blew the lines out while I had the filter off.
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The ones that are listed at O'Reilly's are all universal. There isn't one, trust me.
I did all that you recommended Yelloeye and still no good. But, I did notice that when it would run, it was getting terrible fuel mileage, so I ordered a MAF sensor and that corrected the problem. Running good now. Thanks for the help Yelloeye!
