crxricer66

i recently rebuilt my 94 civic with a 94 gsr motor in it. i did a high compression rebuild and after being broke in i tried vtec and it doesnt work. oil is fine and it is wired the rite way. i have a lite wired to it that shows when vtec engages and the lite comes on but there is no vtec and it redlines at 6000. any help would be much appreciated

claymonthug

bad oil switch or vtec soli? maybe something internal but probably not

crxricer66

i am throwing two codes also 23 and 43. knock sensor and fuel supply system. i was told not to worry about the 23 its been throwing it ever since the swap before

crxricer66

bump i am running a b and m adjustable fuel pressure regulator any ideas on what the pressure should be at? that could be causing vtec problems

Anon51

last time i checked vtec doesn't come on with a knock sensor code set.

crxricer66

i know it did befor because like i said ive had it since the first day of the swap and it was working fine until i rebuilt it. if so then what are some ways to try to clear the knock sensor code?

haas480

theres quite a few threads on vtec.
ur speedo working? faulty vss = no vtec.
you can check your vtec solenoid by unclipping the gray single wire clip from the solenoid, run a wire from the positive of the battery (or any 12v source) and touch it to the solenoid wire which you just unplugged. you'll hear it click if its good. its easy to hear, just touch it on and off n you'll hear the distinct click.
make sure the vtec clips are snapped on, and the wires on lose or anything.

crxricer66

the speedo works fine and i will try the battery test thanks for the help ill keep you posted

haas480

sounds good. make sure you don't have any wire breaks or anything. let us know.

crxricer66

thanks for the help it was some bad wireing. gotta love swaps. i did a compression test and from left to right it was 200 180 180 180 shouldnt it be up around 240? im not real worried because the car has crazy power for n/a.

-__-

im pretty sure no knock sensor will kill VTEC. there ARE ways to bypass it though.

haas480

good to hear ya got it fixed. n yea, thats some pretty low compression for even a stock motor. let alone you making it high compression.