Very High MAP sensor reading

[Eric raugust]

Hey guys this is my first post on this forum. I’ve been having some engine issues for the past while. Here is what’s happening.

anytime I try to accelerate whether it’s from a stop or a rolling cruise it feels like the truck bogs down or hesitates for a couple seconds before it shifts and speeds up. Some times it’s longer than others. Also if I have my cruise set at 100km/hr and I go up a hill or a bad head wind it will slow down to 91-92 before it will shift into a lower gear to speed up to the set 100.

I have changed all spark plugs, both exhaust manifold gaskets/bolts, pulled my pcv valve and cleaned it, pulled the map sensor and seems to be perfectly clean.

Now I’ve done a live data read from the OBII and I see that my MAP reading is 78 INHG while cruising at 100 and 1500 rpm which I’ve read is very very high. At idle it’s around 35 INHG.

The 2 codes that I’m seeing is P0007 which apparently doesn’t exist for a gas vehicle, and P0027 but never both at the same time.

Please help I’m all out of options