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You are watching: 2003 chevy trailblazer mass air flow sensor location


Hello deserve to anyone phone call me where the MAF Sensor is located on a 2002 Chevy Trailblazer? perform they also have a fixed air circulation sensor? If not, what measures the quantity of wait passing through into the engine? due to the fact that I recognize that the PCM provides this information to regulate fuel delivery. Thanks
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It doesn"t have actually a MAF. The PCM "calculates" airflow using it"s entry to recognize air density and also flow.
I can"t think GM was still using speed density in 02!!! I assumed they started using MAF in 94, at the very least that"s when they began using lock in the Camaros.When to be it presented to the mmsanotherstage2019.coms?
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I can"t think GM to be still utilizing speed density in 02!!! I believed they began using MAF in 94, at the very least that"s once they began using castle in the Camaros.When was it presented to the mmsanotherstage2019.coms?
Thanks GuysThanks males for every the help!
Well ns pretty certain the 02-05 I6 to be the only engine to usage SD indigenous GM because the late 90s (except for the I4/I5 Coly engines that are the I6 minus 1 or 2 cylinders). Ns dont see why that is a poor thing, i think the actually better as that is 1 less thing come fail and also GM was still able to extract the power and also mileage they wanted (did the mpg go up in so late 05/06 when the modification I6 was introduced, no). HP/TQ did go up however the MAF has actually nothing to execute with that, its the internal transforms GM do that offer the boost.
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Back againwell men the factor why i asked if there was a MAF is due to the fact that people called me and I review that the MAF controls the wait fuel mixture. View I have actually a problem with my 02 Trailblazer. ITS burn TOO lot FUEL and I CANT figure OUT WHY? ns have readjusted the pan clutch, coolant temperature sensor, fuel pump(because it to be a recall and rusty), oxygen sensors. Ns keep getting the password P0440 Evaporative emission regulate system malfunction. Please can ANYONE help ME? oh and this suv that I have actually dumps fuel by the hour or much less probably on pilgrimage to occupational and back home. I additionally checked because that leaks, none found. Im goin crazy guy . Have anyone knowledgeable this problem?
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yes that does, have actually u make the efforts disconnecting the battery for about 30 mins, and cleaning the accelerator body, and also have u gotten a pcm tune at all? disconnecting the battery mite reset some of its learned paarameters, and if that doesnt job-related i would obtain the pcm reflashed or just tuned. Myabe the fuel curve are completely out that wack some how.
It is feasible that a fracture as little as 0.508 mm (0.020 in) may be found in the fuel tank filler neck, causing a DTC P0440, P0455 and/or P0442 to set. Because of the location over the fluid fuel level, this little fracture will not reason a visible liquid leak.
Some customers may comment about a examine Engine light with a P0440 series DTC indicating that an evaporative emission leak has been detected. After ~ reviewing the vouch data and making dealer callbacks, basic Motors company Operations has uncovered that a an extremely high percent of these DTCs are brought about by the gas cap not being fully tightened ~ a fuel fill.

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I don"t believe that this code will severely effect fuel mileage...What sort of fuel mileage are you obtaining (actual calculations please)?
Well i keep getting P0442 EVAP small Sys Leak and also I believed I fixed what I know I messed up, yet I guess: v I might have this cracked too. Ill acquire under there on Friday and also check.As for changes, basically GM redid the engine internally. Brand-new PCM, upped CR, heads redesigned, MAF added, AIR device changed. There are a pair threads about this, just do a search about it. Thats every I have the right to remember off the top of mine head too, so find for the rest!
Back again
well guys the factor why ns asked if there to be a MAF is because people told me and also I read that the MAF controls the waiting fuel mixture. View I have a trouble with mine 02 Trailblazer. ITS burning TOO lot FUEL and also I CANT figure OUT WHY? i have adjusted the fan clutch, coolant temperature sensor, fuel pump(because it was a recall and also rusty), oxygen sensors. Ns keep acquiring the code P0440 Evaporative emission regulate system malfunction. Please deserve to ANYONE aid ME? oh and this suv that I have actually dumps fuel by the hour or much less probably on pilgrimage to work-related and earlier home. I additionally checked because that leaks, no one found. Im goin crazy male . Have actually anyone skilled this problem?
I have likewise been handling this specific same issue after purchasing my 02 LTZ native the auction, probably I deserve to save you part time & $ by informing you to eliminate your catalytic converters and letting it soak overnight, an excellent cleaning, it’s more than likely constantly the CAT if you’ve gained high miles & no other obviously fuel system issue. Expect this helps!!
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