Question about 1997 Chevrolet Blazer

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Po300 code/ when is cool in the morning,the suv when a due gas .

In the morning only when a due the gas the suv star to chock. after is hot no more problem.low or hit no problem. after running no more problem. code PO300.

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Sounds like your fuel pressure is leaking gas which is located in your intake platinum with your fuel injector unit (SCFI). When the fuel leaks out over night, it floods the intake with gas causing it to give your the issues you have described.
The other issue that may be happening is that your SCFI system is on it's way out due to excessive carbon build on the fuel poppet nozzle which is causing you to have the issues your having.
With the problem you have described, i would lean towards the faulty fuel pressure regulator leaking since the Blazer is running fine after the extra fuel that leaked in to the intake have burnt off.
Replace the fuel pressure regulator first and clean the upper intake platinum of carbon before reassembly.
Thank you for using fixya and good luck

Posted on Jun 05, 2010


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