02sierraz71_5.3

iTrader: (2)

Im getting code P0106 (absolute manifold air pressure)I had a buddy at the GM dealership give me the step by stpe paper work to fix the code. Most of it deals with checking the map sensor. Ive sprayed every vaccume connection I can find with brake cleaner and cant find a leak so this leads me to think the map sensor is bad. The steps call for use of tools I dont have.
I tend to think this is the problem as it only occurs in high heat and I get kr which makes no sense and trim levels that will go out of whack for no apparent reason.

Anyone know of an easy way to check and see if the sensor is working properly, it does give a reading with hp tuners.

Adrenaline_Z

Do you have, or can you borrow a voltmeter?

You can do some simple checks with voltage with the key on, and engine
off, as well as idle pressure.

You can verify those values against a scan tool, or hand held vacuum gauge.

02sierraz71_5.3

iTrader: (2)

The only scan tool I have is hp tuners, I could get a volt meter
is there a way to read the direct voltage with hp tuners

Adrenaline_Z

Not sure about HP tuners.

I have Auto-tap which gives the pressure readings.

I'm sure someone on this site could give you calibration data to check
the MAP at your altitude.

Failing that, I'd grab a vacuum gauge for $20.00 and check it against the
scanner reading.

What exactly does that code mean? What is the motor doing that you would
suspect the MAP?

02sierraz71_5.3

iTrader: (2)

po106 manifold absolute air pressure
obviously first thing I thought was a vacuume leak, then when I couldnt find one I went to my buddy who works for GM and he printed off the checklist that they would use to trouble shoot the code. The majority of the checks involve the map sensor and checking voltages then making shore the circuit and pcm circuit is intact. One of the steps actually calls to hook up a hand vaccume pump 1 inch Hg should corespond to 3-4 kpa drop in map sensor pressure. I was just hoping to get at it the easy way before unhooking stuff and trying to get an accurate vacuume pump.

ZLEEPER

iTrader: (24)

this might be a stupid question but do you have ported maf ends? I had that same code show up in my car. Couldn't figure out what was causing it as it would throw it under different conditions. Had been throwing maf code as well, so decided to put the stocker back on. haven't thrownn a code since.??

02sierraz71_5.3

iTrader: (2)

no maf is stock screen and all.

P Mack

iTrader: (6)

Why don't you post up a screen shot from an hptuners log. Map should be 50-60 kpa at idle and around 100 kpa at wot.

02sierraz71_5.3

iTrader: (2)

would if I could I have no way to get the screen shot off my laptop

I replaced the map sensor today 50 bucks for a tiny vacuum sensor(stealership wanted 80 ), 5 minutes after installing it I get the same damn code. So thats not it. Ive noticed I only get the code in very hot weather over 90 degrees ambient temp and very humid could also be related to running the ac. It could also be related to the head cam combo I have, at this point Im at my witts end.

Anyone else run into any problems with running high comp and large cams in a 5.3

P Mack

iTrader: (6)

I don't know if you're saying you don't know how to get a screenshot or you don't have a way to post it. To get a screenshot just press ctrl-alt-PrntScrn and paste it into microsoft paint. If you can't post it just email it to me Or email the log file if you want.

BTW, I should have mentioned that 50-60 kpa is for a medium sized cam at idle at sea level. A stock cam will be down around 40, and altitude will also make that number lower.

02sierraz71_5.3

iTrader: (2)

Dont have a way to post a screen shot
Just found out that they had problems with that code in the 02+ models Ill log the kpa tommorow, I did log the map volts today and at idle it stays over 2v and does rise into the high 4v range under heavy throttle, when I intitally push the accelerator the voltage drops then starts climbing. Seems to be working fine. maybe its just one of those things