So I keep getting this p0236 code, I have been deleting it with my scanner but it keeps coming back. In getting fluttering noises after I get off the gas, and a/f ratio is all over the place.. Anyone know what the root cause is and how do I fix this? My car is backfiring sometimes when I shift out of 1st also...

 

i would check you map sensors, both of them. make sure they dont have oil all over them. that would be my first guess

 

I've checked the MAF sensor and cleaned it, but I have not checked the map sensors where are they at in the engine bay lol?

 

Anyone know where the map sensor is at and what do I clean it with? Is the CRC spray ok??

 

Bump

 

Lower MAPis next to your A/C compressor, also known as the TMAP sensor because it monitors temperature as well as air pressure. The MAP sensor is on your intake manifold, right next to the EVAP solenoid. It looks just like the TMAP sensor.



MAP is circled in red.

 

Great thanks

 

is it ok to clean the map sensors with the CRC spray

 

Yeah should be fine

 

(T)MAP sensors covered in oil, wrong o-ring (should be blue), or you have a leak.

 

what part of the sensor should be blue

 

I had major P0236 issues for a while due to damaged wires on the connector coming from the lower TMAP sensor. I bought a new pigtail connector and redid the connections and the problem entirely went away. If you didn't get the 'plug and play' connectors with your GMS1 there is a good possibility the problem is in the wiring.

 

This is generally what we have seen for the past year with P0236.

Been there done that.

Check the lower charge pipe TMAP for frayed wires, loose connection, sensor disconnect or anything else abnormal. Could be rubbing on the AC line and you not know it.

 

There is also the problem with condensation from the A/C line getting into the GMS1 sensor connections and causing issues. That makes it a bitch because it only happens every once in a while.

In my pic, you'll see that I used the new crate engine depot adapters to install my 3 bar sensors. Best money I ever spent. No issues at all.

 

ok thanks guys, I'll check the lower tmap, and would it be ok to tape it up with electrical tape so the condensation from a/c line does not drip on the sensor? I think it's the plug and play they are the same as the ones in the post above with the pictures

 

If it has the adapters, then it's not a wiring issue. It's the sensor or the o-ring being the wrong one.

If you pull your TMAP sensor out and it has a green o-ring, instead of blue, you need to get the blue o-ring on the crate engine depot site.

 

is there a boost control solenoid on the lnf? cause it could be that.

 

There are two solenoids. One controlling the BPV, which is on top of the intake manifold, and one that controls the wastegate, which is bolted to the turbo.

 

would you happen to know the part number for the blue o-ring, I'll think I will go ahead and buy new map sensors along with the o-ring

 

O-RING 3 Bar Map Sensor 12626998

 

reviving this thread lol. im currently having problems as well. turbo flutter and low boost. already swapped out MAF sensor and the boost control solenoid on the intake manifold. Any idea where to locate a new solenoid thats bolted to the turbo? cant find it anywhere. also, wheres it located on the turbo itself? lol

 

You need to check your MAP sensors and wiring. If you have GM Stage 1 it's likely the wiring on the lower MAP. As said above, check the MAP O-rings as well

 

The solenoid on the im does not control boost. It controls the bpv. Its basically useless unless u still have a vac tank

 

Why are people concerned about flutter at low boost let off, the lnf does this , get used to it. I tried everything I could think of to get rid of it, even a bov. Nothing worked. On my setup now I don't get any at all , Idk if it's cause of the big turbo or because I drilled out the port on the im , tapped for 1/8 npt and used bigger an4 line to feed my bov . could try that with a bigger line and see if that works for u

 

I'm going to guess it has to do with your drilling out your IM and going to AN4 line