Mass air misfire
#1
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Mass air misfire
Hey what's up guys I have a problem I can't seem to solve I have a 99 z28 with a 2002 6.0 lq4 and I have a p0300 code I have replaced plugs and wires and replaced my o2 sensors and even swapped coils from another car and it didn't fix it. But heres the wierd part I unplug the mass air the misfire goes away and the idle smooths out, so I ordered the slp mass air and put it on hoping it would it fix it but it didn't the code came back on. Does anyone have any idea what my problem could be? I hope someone can help me thanks
#2
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I have the same problem with my car. I've been through the stock maf, a SLP maf, and now on to a Delco Z06 maf. Still getting the same P0300 code as b4 also. I also changed all the plugs and wires and both O2 sensors! Its been driving me crazy!!! Interested in seeing what someone has to say about this.
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Mines just a stock lq4 out of a silverado with just headers and throttle body but you can feel my misfire with a rough idle if I unplug the maf the idle smooths out and the p0300 goes away but of course I have a maf code
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I fixed my problem, when I did the 6.0 swap I left the 6.0 sensor in like the can and crank sensor well I was doin some research last night on google and the search came up about how the crank sensor can cause a misfire so I was thinking that I didn't relearn the sensor so I brought it in today and relearned the crank sensor and checked the misfire data and it all went away and drove it on lunch and just drive it around it never came back and runs better