What would cause vtec to not ingauge with out throwing a CEL?

It will cross over at part throtle but not WOT but it also will not throw a code. I have a vtec light and it does come one when the ecu tells it to but say I start in first at wot when I go in to second the light will come on but it wont change over.....??

The only thing I could think of is some thing on the vtec solenoid its self.

 

I just fixed a problem like this on my friends car, the CEL was not on, but i checked anyways because everything else was good (oil level, gauges, ect.), and it came up 7, 43, and another that was the MAP sensor. So i changed it (map sensor) out with one i had laying around and that fixed it.

 

ok but my car is obd1, When I shut the car if the codes go away... How am I to check for codes when there cleared?

anyway it was the map that was the problem?

 

This was obd1 also, a 95 ex. Just leave the car on and check it, thats all you have to do. Yes, the map was the problem.

 

Well i was out driving a little while ago and all of a sudden it ingauged everytime but it popped a cell and being a dumbass I shut the car off before I could get the code, But it did ingauge with the cel light on every time at WOT

lol.. Giving me a headache