I removed my head to replace my Headgasket and put the entire thing back together and now VTEC isn't working? I put it together twice because the first time the headgasket didnt crush properly. The first time I did so, VTEC was working and now its just not. The only thing I can think of that happened different is that that when removing the intake manifold there was a sensor still attached I was not aware of and it pulled the wiring out. As result the car would not start initally, when I reinserted the wiring into the plug, the car started right up so I am assuming that it is working properly. Does anyone have any ideas? I also have an AEM EMS so I can check any settings or info needed. Any ideas on this would be great because I genuinely dont know what to do. Thanks!

 

its a long shot, but ive heard of bits of a gasket getting into blocking the vtec solenoid... if you put the gasket in wrong it may have pinched a chunk off? just my .02 cents worth. But which sensor did you pull out? only a few sensors there

 

I will try to clean my VTEC solenoid When I get home. I also forgot to mention that My timing chain tensioner came out on the first drive. the car DID NOT jump timing, I was sure to check that as soon as I removed the valve cover.

This is the Sensor that I pulled the wires out of from the bottom.

(It is the one circled in red, not the map sensor in the guys hand)

 

Anyone have any ideas other than the solenoid?

 

low engine oil level can stop the computer from letting vtec engage. Also the knock sensor connector on the block could have pulled out of it's socket too causing no vtec. Do u have a CEL?

 

It's pretty easy to lose a VTEC rocker pin when the rockers are removed.

 

I am usually really good about checking those because that's happened to me before, I will pull the valve cover and cams to check that tomorrow if I haven't found another solution. Does anyone know what that sensor is, or if it would affect VTEC? Also, how do you properly clean a VTEC solenoid?

 

Are you sure? I was not aware that there are 2 crank positioning sensors? The only one I am aware of is green, and screws into the side of the block on the driver side?

 

That is the plug that leads down to the crank position sensor.

 

The green one is the knock sensor.