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Showing results for tags 'running rich'.
I have a 2003 Silverado 1500 with the 5.3 in it. For the past couple months the trucks been getting the p0172 and p0175 bank 1 and 2 running rich. I have clean the maf sensor and put a new air filter and spark plugs in and cleaned the pcv valve, throttlebody and map sensor too checked for leaks around the intake manifold and around the throttle body and found no leaks also put in new o2 sensors and the codes still come back up every time. Wondering if anyone else has had this problem or know what could be causing the codes? I’ll post a picture of the freeze frame data from the codes too.
Hey all, I drive a 97 k2500 p/u w/ 5.7L. I'm trying to diagnose all the problems listed above, but don't have a lot of experience (or money for that matter). As far as the no start problem, it will sit and crank forever, but the only way I can get it to start is by applying the gas pedal and even then it still struggles. In addition to all that, it struggles and stutters and just generally has no balls. I thought it might be the fuel pressure regulator so I got a fuel pressure gauge and attached it to the schrader valve. When I turned it to accessory and let the fuel pump run, it shot up to 60 psi and then down to between 15 and 20 psi after a couple of seconds. When cranking it, it's at 60 psi as well. Does anybody have any advice or idea what it could be or where I should look next? I'm kind of new to troubleshooting vehicles so any help would be great.