I have grounded VTC solenoid this labor day weekend to eliminate the VTC noise. I wonder if anyone has done the same to their SEs. Can you share your experience? Especially the performance before and after.

Immediately after the operation, I started the engine and have noticed the 2nd second after the engine started, the rpm dropped to about 400 but it came right back to fast idle. Of course, the engine shaked a little bit. There is no such problem when starting a warm engine. This didn't happen before the mod.

During the road test, it seems to me there is no such a power difference at first. But when I kick it down, it seems like the engine doesn't want to rev as fast as before. I kind of feel like the overall power is weakened. I don't notice the power surge at 3000 rpm anymore. Definitely, if the VTC is suppose to change the CAM timing at a preset rpm, it will not do that when it is disabled.

I'm thinking about a further modification of this wire. I want to put a switch somewhere along the dash so I can control when to grond the wire or when not to ground it. So when the noise is really loud in front of a red light and the drivers around are wondering who is driving a dissel, I just flip the switch and kill the noise.

-AC

 

this has all been discussed in depth. Do a search. I'd comment, but my ideas and experiences were fresher earlier. I have had sucess with the rewire in the 92 SE. Your switch idea will work, but I believe you need a diode.

 

I just attempted a search on the same thing, but since we only have like the last 3 weeks topics, it wouldn't find anything for me.

I need to know the same stuff, I am scared to do it if that means less performance.

I race

 

get a shift light tach make it light at 3000 rpm. figure out a way to make it activate(sp?) the vtcs with the light. almosts like VTEC

 

you won't need a diode or anything.. just attach one end of the switch to your vtc wire, and the other to ground.. then when the switch is on, the VTCs are grounded. when it's off, it doesnt' connect to anything, and the car runs like "normal"..

As for my experiences with the reqire.. mine is about the same as yours.. the biggest way to see the difference.. run the car about 1/3- 1/2 throttle in 2nd gear.. when it hits about 3800rpm, you'll feel the car surge forward.. I don't notice it under WOT conditions, but the thing just pulls away like a turbo kicking in at part throttle.. it's especially cool cause that's when my CAI starts making a little whistle sound.. I dunno how many Honduh owners have asked me who installed my turbo.

also, mine has a terrible time finding an idle speed. it's wander between about 400 and 1000 rpm every time I touch the gas pedal. disconnect the ground on the VTCs, and the problem goes away.. which is why I'm going to jsut add a switch myself too. just turn the VTCs off when it's cold, then turn 'em back on once the engine reaches temp.. (the thing only ticks the first 1-2-3 minutes after a cold start anyway)

 

Thanks guys for answering.

My VTC noise actually comes when the engine is warmed and idling. Morning start usually will not give me lots of VTC noise since the oil is thick. (Seems like my VTC noise problem is reversed from most other SE owners)

Definitely, I don't feel the surge anymore at 3800 rpm after grounding the VTCs. So I feel like my engine is now downgraded to the GXE (160HP). Idle rpm only hunts betweek 400 and 1k when engine is cold. It sticks at 700 when engine is warm. My car is all stock and I have not modified anything. Usually, my wife drives the Max so when I asked if she feels any difference and the answer is "no" (as usual).

I don't think I need a diode for my switch too. My only concern is to flip the switch when the engine is running (when the wire is "hot").

 

feel your upper and lower hoses for heat and pressure you may notice something, also to correctly check your oil, warm it up first, also make sure its right for your temp zone, synthetic will ushually give you some start up noise when starting, i ushually crank it first once then start. this may help if you over looked this info

 

when i said check your plugs, i meant for oil, most likely this is the problem, just remember the cylender that you found the deposites in

 

It's definitely VTC noise. Because I don't have this noise anymore after I ground it. If this is due to oil, this would make no difference whether I ground the VTC or not. Also, I change my oil every 2500 miles and my temp gauge always sticks in the middle after warming up. I use original NGK double plat plugs too. I think my VTC definitely has weaken because when oil is warm, it's thinner thus less oil pressure up there at the VTC (high point of engine).

One note here. Initially, I found my engine seemed to be running rougher and less power. After driving the car for sometime, it's smooth now. I wonder if the ECU has optimized itself after collecting enough new driving data.

Thanks.

-AC

 

haha, you mean, you TRY to race, right mike?

AC439: i like your signature...i was going for mcse but stopped...need to go back

casey

 

Okay,
I've read many times about this VTC stuff. Can someone explain what it is? Is it the air noise that I hear when inside my hood w/ the engine running or that heavy sound when I hear my wife step on the pedal really hard from a stand still?