I was driving the other day and i noticed my exhaust sounded a bit different, and i backfired a couple of times which RARELY happends. I thought nothing of it.

Yesterday, my vtec started acting up. My vtec controller was set to kick in at 5000 rpms, but it would engage at 3500. Not only that but the vtec would kick in, then out, in,out,in, out and so on. Until i would punch it until vtec would just stay in.

This was starting to scare me, so i set vtec to kick in at 9000 rpms so it wouldnt come on anymore. and the problems jsut got worse.

Later that day, my car started backfiring like a ****. Everytime i would give it half gas, it would start backfiring rapidly, almost as if a machinegun was coming out of my tailpipe.

I run on higher octane gas, my oil is fine, plugs and wires fine. Im unsure why this is happening. Only thing is my vtec solenoid leaks oil pretty damn bad.... but it has always been doing that, and this problem was not occuring before.

Anyone help is greatly appreciated as to what i should do.

Thanks

 

i dont know much about the vtec contrallers bt i think you might have messed with fuel in it is backfiring. maybe its funning a little rich. that what my buddies car did

 

i havnt done anything with the fuel

 

what vtec controller?
vafc, fields...?

b/c maybe you did mess with the fuel if you have a vafc.

i would reset the ecu, double-check all wiring, and see if you still have the problem.

and maybe you could try it without the vtec controller installed.

 

well from wat i heard from my buddy cause hes a honda pro he has the fastest honda in canada vtec controllers are not worth buy nor installin cause for some reason they tend to work fine but then expletive up the performance of the car best bet get your ecu chipped with a nice tune on the motor

 

ok i removed the vtec controller. (no its not a VAFC)

Its still misfiring like a ****, when i change gears and when i give it more than 1/2 gas. It misfires rapidly.

I checked spark plugs, dizzy, wires... i dont knwo what the hell it could be.

any pointers?

 

Throttle position sensor, timing issue, distributor rotor loose?

Anyone else have suggestions?

 

ok ill check up on those..

anyone elsse got any ideas?

 

you should check everything electrical from plugs to dizzy rotor etc

 

sounds like your cam timing is off....rotate the motor to TDC and check if the cam marks line up...if they have slipped, return them to TDC and do a compression test on the motor as a quick check to make sure you didnt bend any valves...
also pick up a gasket for your solenoid...only costs a couple bucks at honda

 

thanks suck my dx... ill look at that

 

i had a similar problem and it turned out being a corroded battery terminal