liljukmoves

me and my friend hooked up his vtec controller today and we think its all hooked up right......the controller turns on but cant tell the revs and the car is running in limp mode it wont go above 5000rpms and its kicking a cel code were gonna go use an obd2 scan tool tomorrow but if you have any idea what it could be please help!!

Red_Army

its that you hooked up a vtec controller. take it out.

liljukmoves

what do you mean? whats the problem with it?

ReDHaTcHyGuy

They are junk and worthless on pretty much everything.. What motor etc is he running?

apexi_rsx

would help if u explained a little better and gave us more information in what ecu ur running and what motor. Like he said most vtec controllers are junk. u cant tune anything but move the vtec crossover around. which on a stock motor and cam is set for best its performance from the factory and does not need to be moved unless u have cams then u would need to run a chipped ecu or hondata to tune and change your vtec crossover. as a tuner can fine tune ur vtec crossover,ignition timing and fuel if u decide to get a cam. your best bet would be to remove it and sell it. it seems like u didn't have a problem before installed this vtec controller. are u sure u spliced the right tach signal, vtec,and power wire? check your codes and report back to us. we cant give u any answers from what u described in your post but to remove it.

liljukmoves

its a d16y8 motor stock ecu (1998 honda civic ex m/t coupe) just a couple bolt-ons headers, high flow cat, muffler aftermarket intake manifold, stock plenum, etc.

we used a haynes manual diagram and it said for the ecu the vtec solenoid cable was green and yellow so we bypassed it with the controller checked all the splices they all were good, then it said the engine speed or rpm was black and blue and on connector c so we found that and tapped into it, next we clipped the vtm wire and grounded it like it said to do we hooked it up to the battery with a 5 amp fuse grounded it hooked the accesory wire to the deck power so it would come on when the cars on and i think that was it

apexi_rsx

so this is a vafc your hooking up? A8 is where vtec goes to the ecu. vtec pressure switch (vtm) is C15. C18 is the Vss ( speed sensor). if ur looking for tach hook up u can run it to the negative side of the coil or the light blue wire thats coming outside the distributor is the tach signal wire or A20 at the ecu(ICM module wire). check out this site maybe it will help. check out this web page to determine what is what http://www.ff-squad.com/technet/wiring.obd2a.htm

ReDHaTcHyGuy

your not gonna gain anything on y8 with that.. your better off throwing it in the trash.. a single cam isnt gonna gain anything from changing vtec points

Wrona

But he Can move the vtec! yea vtec controllers are worthless resell it

grumblemarc

iTrader: (4)

Let 'em waster their money. Some people only learn by doing.

liljukmoves

yeah i figured it wouldn't do to much but he wanted to do it so he could get the peak 120+ hp sooner from the high intake cam lobe and when he's racing it every gear change you'd drop off vtec so we tuned it down to 4300 (stock is 5000 i think), i dont have vtec i got a 97 lx d16y7 you guys have any ideas for safe power gains that wont affect my epa? i have a cone filter and larger intake manifold pipe new plugs and wires and an axle back muffler. im thinking exhaust headers and i high flow cat and swapping the intake plenum for a y8 or a performance one for a y8 motor cause the gaskets are the same and maybe a larger tb thanks!