I replaced the pigtail for the map connector and just changed out the sensor with an acdelco one and I'm still getting a CEL code 33. Is it because of the cam im running? I also noticed that my driverside exhaust seems really cool compared to the passenger side..

 

Well, is your vacuum low? Got any real time scan data of your MAP readings?


DTC 33 sets when MAP is greater than 80 kPa (or 90 kPA with a/c on), RPM greater than 500 and DTCs 21 and 22 not set.

 

What about my driverside exhaust being really cool compared to the passenger side? What could that be besides cylinders not firing?

 

No, that's about it....

Pull a plug on the cool side and tell us what you see.

 

Pulled a plug on the driver side



I changed them out before I fixed a bad o2 and an exhaust leak , They are covered in soot from running rich. Will they need to be replaced again?

 

That looks pretty normal from what I can see. The gap is a little big..what are you running? .035" will smooth out the idle.

I expected to see a wet fuel covered plug becuase I thought it wasn't firing on that side. I didn't expect to see a dry plug with the normal tan color....

 

I don't think they look normal . Gapped at 0.50

 

It's tough to see. In the first set, one of the plugs looked tan...not black so I assumed correct heat range and no issues.

That second pic is fouled. Try cleaning them and gapping them to .035" That center electrode looks pretty rounded off but it could be the pic....

 

the #2 plug looked the same and the # 4 plug is different ..

 

and here is the back plug on the pass. side

 

Pulled all plugs and re-gapped them at 0.35 , it does run a little smoother but I'm still stumped at why I'm getting a High Map code with a new pigtail and sensor.

 

Did you measure the vacuum, as Shoebox suggested (or read the MAP, since vacuum = barometer - MAP)? You got a code for low MAP... and this is not necessarily caused by a faulty sensor or a faulty pigtail. It can be caused by low vacuum/high MAP. If you've never checked the vacuum, to see why the code is setting, you're wasting your time and money.

 

How do I go about checking it?

 

As suggested in post #2-real time scan data. Or you can use a vacuum gauge. You seemed to completely ignore the post and go off in another direction.

 

Well I dont have anyway of getting real time data and I will have to buy a vacuum gauge. Just a thought , Wouldn't a decent amount of carbon buildup in the intake manifold cause map codes?