924doorEG

its weird, my car only hits vtec when cold, i was told it has something to do with the head internals when it was rebuilt, but thats besides the fact....anyways when im driving and i hit vtec the car goes way down to cold like as if the car was off....i drive around town and it gets all the way warm, and i mash on it vtec dont engage but the temp stay the same....only when its in between operating temp and cold vtec works and when i hit it it goes all the way to cold....im stumped.....and ideas?

924doorEG

Bump....help please i need to know if theres a prob with it....

stevenson_18

hey,just a guess but check the connections on your sensors first. The other thing it might have to do with could be a bad ground. The last thing I would think it is something in the ecu. Try and find somone that has one you cant try.

924doorEG

Checked all grounds, good, i have 4 p28's 2 chipped and 2 not and it still does it, wires look good bud sensor looks old az hell

stevenson_18

There are three sensors dealing with the coolant, the gauge is the single post that has the black conncter on it, just pulls on and off that would mess your gauge up. The other is the coolant temp switch that turns of your fans, usually by thermostat, and the cooland temp sensor usually by single post gauge sensor. Its pry a mix of a bad coolant temp sensor and bad connector on the gauge. If not that it could be shorted wires. I hope its not that for your sake because thats wha I think im dealing with right now throwing map codes.

924doorEG

ouch man....well i'll check all three and thanks again man...

B serious

iTrader: (1)

The CTS sounds like it's faulty. Go to a junkyard and pull a CTS...IIRC, a D series one should work.

924doorEG

would the cts sensor cause vtec to not work while its warm?

924doorEG

Anyone?

stevenson_18

I had a 96 honda accord with h22a, when cold vtec would not engage, it had to be warmed up in order to work. If your sensors are throwing off your ecu even if your car is warm but sensor says it cold vtec wont engage. Also what your gauge reads and what the cts is telling the ecu could be two different things because they run off different circuts.