Recent content by vertical99

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    Code p0172 and p0175

    Well I broke down and took it to a local mechanic that a guy from work knew and he said it was the ignition timing. He said with an older truck with high miles the timing chain gets stretched out and the computer has to relearn the timing so He hooked up his computer and ten minutes later it was...
  2. V

    Code p0172 and p0175

    I am going to do a pressure test this weekend. The guy I bought it from said he changed the fuel pump but that doesnt mean it couldn't go. Also my fuel gauge is messed up. It went way pass full and is at the bottom. Thank you for all the help.
  3. V

    Code p0172 and p0175

    Ok here is the obd data at idle. Also the p0172 and p0175 came back along with p0300. Also if you think it is the fuel injector what make do you think I should put in and since i am replacing stuff should i also replace the fuel regulator. Motor has a 157000 on it. Thanks
  4. V

    Code p0172 and p0175

    I will take a pic of the fuel trim data. Yes it started with p172 and p0175 but once I change the plugs and wires those codes went away and I got the p0300 code which is multiple random misfire. I did look at the fuel trim the short fuel trim was hovering around 0 and the long fuel trim was...
  5. V

    Code p0172 and p0175

    Also made sure all the new wires were on correct.
  6. V

    Code p0172 and p0175

    Sorry to bother you but I am lost. Ok I changed the plugs and wires and now I changed all the coils. The p0300 still comes up. The motor idles fine and runs with no hesitation. One thing is now my fuel gauge is not working right. It has gone past full and is down at the bottom. I will be...
  7. V

    Code p0172 and p0175

    I put ac delco wires and NGK iridium plugs
  8. V

    Code p0172 and p0175

    So I changed the spark plugs and wires. Now the p0172 and p0175 are gone. The new code is p0300 random misfire. The plugs and wires that were on the truck had to be the original ones they looked really bad. Do you think one of the coils are bad . Thanks.
  9. V

    Code p0172 and p0175

    Do you think it could be the wire harness and the connector to the Maf sensor. I will be changing the plugs and wires this weekend
  10. V

    Code p0172 and p0175

    Just bought the truck a week ago. running 87 octane have not done the plugs and wires yet. i did change the air filter. what about when i unplug the MAf shouldn't it stall the motor. when i unplug this one the motor keeps running.
  11. V

    Code p0172 and p0175

    I have a 2003 tahoe z71 with a 5.3l motor not flex. I got these 2 codes (p0172 and p0175) so i figured it was the MAF sensor. I read a article that said if you unplug the sensor and the truck stalls the MAF sensor is ok, if the truck keeps running then your MAF sensor is bad. So i unplugged the...
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