2001 Pontiac SSEI with code P0102

I have a 2001 Pontiac Bonneville SSEI. Just one day the car started acting up and would stop cold going down the road. My wife drove the car and it quit on her and she finally got it going a few more times and made it back home. Long story short. I first checked the fuel filter, fuel pressure and Mass Air and MAP sensor, they all were ok. I purchased a low cost scanner, the code that came up and the only code was P0102. I called Auto Zone and they said that it could be a few things, Vacuum hose leak, vacuum leak around the throttle body, not likely but a chance of the MAP sensor or the intake manifold gasket. About 2 years ago I had to replace the intake gasket as the original gasket like most others from GM went bad. No problems for two years and now this?

So far,

Checked fuel pressure, OK
Fuel Filter, OK
MAP Sensor , OK
Mass Air, cleaned , OK
New Vacuum line, OK

I thought of changing the cam sensor, but that did not make any sence to me at all and I also thought of changing the MAP sensor, but that checked out ok. Next is the intake again and the Supercharger gasket?

Am I missing anything?

Just one additional bit of info. While talking to a person yesterday he mentioned one other item to test. The person said to verify when the PVC valve is removed, ( engine running ) that the gasses coming from the valve cover should be extruding gasses out of the hole, if there is a vacuum then the intake manifold gasket is bad for sure. I am not sure on this method, just one more piece of the puzzle I guess. I just hate to tare this apart again with out being 100% sure of the cause. Of Course this is he 3800 Series II motor Supercharged.


Regards


Trump

Dont know about that..you can block off the pcv valve and the hole in the valve cover then take the dipstick out and if there is vacuum being pulled in the dipstick tube then the gaskets could be leaking from underneath. If you cant find a leak externally. The code is for the Mass air flow not the map sensor. Just because you cleaned the air flow meter does not mean its good. I would change it.

Doing the check on the PCV is worth while, I can do that before I launch into anything else. I know the new Mass Air is not cheap, that is not the issue at all, I just would like to get it fixed. maybe a better scanner would be better in the diagnostic testing as I just got a cheap one. I guess I will need to dig a little deeper and maybe even do some testing on the Mass Air unit. So far it is parked in the pole barn where it is out of the weather, just waiting to make sure which way to turn.


Trump

There is NO hole in the valve cover, you must not be thinking that this is a Supercharged Motor. Unfortunately doing some trouble shooting on models that are Supercharged is NOT the same as other natural aspirated motors. The PCV check valve is NOT in the same place as a natural aspirated 3800 motor and thus you are NOT able to test the system the same. I think a lot of people feel that everything is the same, but only in different locations. The 3800 Supercharged 2001 Bonneville has the PCV check valve with NO vacuum hose to it or any electrical connections, it is below a black plate on top of the supercharger and it has two # 10 bolts holding the cover on with a spring inside holding the PCV valve in place. The PCV valve goes in a hole down through the Supercharged into the manifold, plenum. When I blocked off the top of the PCV valve and put the plate back on the top, ( which eliminated the transfer of the PVC air from the plenum ( intake manifold ) to the Supercharged the engine ran fine. I checked the dip stick for vacuum or pressure and it seemed to have ZERO nothing coming out, but the motor ran real good. What did this test prove? To me I felt like it told me that the lower intake manifold was not leaking, but now here again what is going on with the Supercharger manifold gasket? I may check on replacing the Mass Air sensor, but for $150.00 and a pure guess I am not sure it is worth the risk at this time. I did use a good high impedance ohm meter and I do get a good reading on the terminals + and - on the Mass Air unit, but I know that his not the whole issue. It may be better to contact a speed shop who may know specifically more about this area.