Just last night this happened. Everything was going fine with my gsr then suddenly when I go to speed up while getting on the freeway whenever the VTEC kicks on it bogs down instead of picks up. It seems to have a more throaty sound to it as well where typically they all seem to become higher pitched when they kick on.

Anyone know what the hell might be causing this? I checked fluids and all were ok, my oil was down about a quart so I added some oil but I don't know what would be causing this

 

come on someone has to have an idea whats going on

 

my ls/v did that i took the vtec screen out and clened it... and dose it only bog when u go to hit v?

 

This is as vague as "my car wont crank, whats my problem". Answer that for me and I'll give you an answer to your question.

Do you have a CEL, did you overrev your engine, have you done a compression check, what were you doing previous to this that you "left" out of your post, etc? More info please.

 

I have a CEL but it's for bad knock sensor wiring, always has and still is. No I haven't done a compression check. I'll be doing that next. I'm not asking for anybody to give a solid answer but a possible few answers as why a when a vtec kicks on it bogs down instead of getting the car going faster

 

Check your timing belt, and make sure that your not missing a few teeth, check and see that your cam gears line up. I would check your CEL's again friend....

 

could have dirty air filter, fuel filter, dont over look the easy stuff. Also CHECK BELT.

 

I pulled My cel codes. I got a light for a leak in the ac(ac is takin out), knock sensor(bad wiring), and oxygen sensor( something in the rode and put a hole before the cat so I'm getting horrible air/fuel mixtures for my oxygen sensors).

I checked my timing belt, no missing teeth just wearing out a lot. Replacing it this weekend. Looked up the related problems hear and well a little discription is it's fine till I get to where my VTEC kicks on. It makes a sputter noise and no gain in rpms. Other people with similiar problem cleaned up the vtec solenoid, so this weekend I'm fixing the exhaust leak, new timing belt, fixing knock sensor wiring, and cleaning VTEC solenoid. Should b fun.

Hopefully that fixes it if not. We are running compression tests.

 

i still think its the screen but could also be that wiring for the knock

 

is it chipped/tunned or running stock vtec kick in points? I think your list of maintence should cover it, if it doesn't look at ignition timing, and programming(if applicable). If that doesn't solve it I do have an Idea, don't really want to think about it.

 

check your oil level

 

My oil levels are fine. I already said that was the first thing I checked. It was a quart and half low. Filled her back up, still same problem. Everything is good till I get to when the VTEC kicks on, you hear it go on but sputter and no gain in speed or rpm's.

I lost time to work on it last weekend, but as people have been saying they think it's my VTEC Solenoid screen that's dirty. I'll be cleaning that, then replacing my timing belt since it's getting worn, and fixing up my knock sensor since the wiring is bad.

monster_ls/vtec I'm confident it's the screen to by what I've been reading.

 

dude if you knock isnt work right you vtec isnt going to work propely for you fix ya knock first

 

The screen for my vtec solenoid wasn't really dirty at all after pulling it off. I'm hearing peopl telling me it's my knock sensor well my question is why is it doing this now when it was like that for a few months?

 

Ok update. I finally looked into my knock sensor. The knock sensor is still like new(it's only like 6 months old) the wiring and everything was fine. We tested the connection and it was good. hooked it back up. Cleared all the codes for my CEL

Now after about half an hour of driving the CEL never came back on, the vtec seems work now just not as powerful as it was before. I gain speed and rpm's but it's not the pull it had before this problem happened. Once in a while I get the weird bogging sound when vtec is supposed to kick on and I don't gain speed or rpms. To me it seems like it's sticking or something

Oil levels are fine could this mean my vtec solenoid is going?

 

I had a similar problem with my 92 gsr. check your timing if you haven't. try moving your distributor a lil bit and tighten bolts back up and run your engine. then try reving the motor you should hear the motor soud different then take it for a spin then it should crack VTEC. It might of happen since you probably changed your distributor or your timing belt maybe, but try it. Now I jump in my ride and( LIKE ANY RACER........ STRAIGHT FOR--------------->>VTEC!

 

I know it's old but I'm just gonna state that I fixed the problem. I pretty much did everything people told me to do. Check belts, oil pressure, filters, etc.. But one thing everyone seemed to over look was the fact I was throwing a code for my oxygen sensor because of the hole in my catalytic converter.

I replaced my catalytic converter and resonator due to later inspection it too had a hole. Well due to the holes I was throwing a bad air/fuel mixture. My computer seemed to be thinking I had a lot more oxygen then fuel so what it was doing was dumping fuel into my motor when it didn't need to(so it was literally flooding it) and I was also loosing some backpressure. It's nice that I went through and did everything else cause now I know they are all good and I'm sure will last longer.

But I just want to put it out there the entire problem was caused by a hole in my cat and resonator.

 

Hey guys, i'm new here. (posted this on another thread)
I don't think its much off topic so here goes.

I have a d16y5 engine on an ek sedan which bogs at 5000 rpm. I've changed the fuel pump, filters (air, fuel and oil) new oil, plugs and distributor and yes no CEL codes.

all stock save for SRAM (recently cleaned element) intake and apexi muffler.

Out of frustration, tried to disconnect the vtec solenoid socket and tried it out. Surprisingly, it did reach the red line. (CEL was on)

I reconnected the solenoid, reset the ECU and again no codes.

I'm stumped.

BTW, i also changed: Engine temp sensor (the one below the distributor) and IACV recently. tried the MAP sensor of a friend as well.

In terms of drivability and power (before 5000rpm) its great. its just really irritating for the engine stop revving at 5000 rpm.

Please help!

oh and one more thing. this is my original motor. no swaps at all.

 

try this:
https://honda-tech.com/forums/honda-prelude-4/official-%22why-vtec-doesnt-engage%22-thread-830163/

 

Just for the info of everyone. I solved this issue already.

1. replaced dizzy o-ring
2. resealed vtec solenoid gasket (strainer was clean)
3. Crankshaft pulley to 0BTDC/ camgear to TDC (Honda manual says that drive pulley to TDC in such case would cause crank pulley to move to 18 BTDC
4. adjusted valve lash IN (0.08) EX (0.10)

now running extremely well.

 

check ecu? vtec sel? spark plugs? timing?

 

could the vtec solenoid itself be bad?

 

Doesn't anybody read and pay attention? This thread is 18 months old, OP's original issue was resolved, and the last time the thread was brought back up with an issue, that guy's problem was also resolved. Why keep bringing it back up with more suggestions?