Recently my car has started acting odd. I hooked the aem up to my laptop when it started this and it said engine load was at 9 while ilding. I wiggled the map sensor and cranked it back up and the engine load settled at 2... The sensor worked fine for about a month and now it has gotten worse.

In case your curious, its an AEM standalone running my boosted h22...

Now, the car will not crank and due to engine load reading 27 while the car is in the ACC position... I can ponder as to why this is such a way. The duty cycle on the injectors is about 13% vs the .13% it should be.. Thus, it floods out on the first rotation... I thought it was a bad map sensor. Ordered the updated version of the gm 3 bar as the one I have is no longer made and it did not change a thing. Both sensors are essentially the same... So, I found a pinout and voltage graph readout online and checked my stats. I got the multimeter out and proceeded to check it all out at the sensor.. Power reads 5.2V.. Signal power was at 1.65V( I think, I remember going looking at the graph and confirming it was 100% on at 0 boost and 0 vaccuum.. So, that one was accurate) Ground reads .13 V... Its passing power through ground NO?

I dont know what pinouts the sensor is going into the stand alone to check there or just use the standalones V readout thingy for the sensors as I cannot find info on that yet... Can anyone help/guide me in the right direction?

Nothing was changed to alter the LOAD readout on the map sensor at all...

PS. I tested both sensors on it and got identical results... Both being perfect at the sensor... I am so confused and unable to crank the car, much less drive it.....

 

Make sure the sensor is picked right in the software. Use the sensor map sensor wizard.

 

i have heard there are numerous types of "GM 3 Bar" sensors out there, all having different readings. you may want to look into that. and do as he said>>>>>>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rtype16 &raquo;</TD></TR><TR><TD CLASS="quote">Make sure the sensor is picked right in the software. Use the sensor map sensor wizard.</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rtype16 &raquo;</TD></TR><TR><TD CLASS="quote">Make sure the sensor is picked right in the software. Use the sensor map sensor wizard.</TD></TR></TABLE>

Yeah do what this guy says ^^

 

Also, check the readings near the ECU to rule out wiring.

 

If you've recently upgrade to v 1.19 there were some issues where the map sensor would become "unselected" and you would need to reselect it, and rescale a few maps.