i tried a search but i wasnt sure waht keywords to look under!
OK i have a del sol vtec with a b16a3 stock motor in it. My old setup was Spark racing mani with sc34 turbine 38mm wastegate. not sure what info you need on why its doing this.
About 3 weeks ago the spark racing mani cracked and i ordered a inline pro mani. since then the only other thing i have changed in my enitre car was the spark plug wires. But now my VTEC does not engage or is just barely engaging. i used to be albe to hear the crossover loud as hell when the wastegate was open even by just half throtle i could hear the crossover. But now with the new mani its wither not kicking in or its very WEAK! The car doesnt have the pull it used to have in the higher RPM.
A few ?s i have.
I was tuned on hondata with my old setup. I havent retuned since the new mani. does that matter? would that affect anything?
Also when i noticed it wasnt crossing over i checked my oil and i was overfull by about 3/4 of a quart!!! could that of done anything to it. i drainded it down to normal level but it stilll didnt help.
Oh yea i have no CELs either so im not sure. anyone else expierience this?
TIA
Ty

 

I had a similar problem like this. All I did was pulled the VTEC solenoid and cleaned it out. I got a Q-tip, used dry, didnt soak it with anything, and cleaned that mother out. After re-install, let her come to regular operation temp, took her for a spin, and WAH LAH, problem fixed.

Give this a try. I was doubtful but I figured what the heck, everything else I tried didnt work.

Jon

 

were you throwing a code?

 

i cleaned it out and it still doesnt kick. still no code either. WTF

 

vtec solenoid working fine?

 

replace the gasket that goes in between the head and solenoid just an idea

 

make sure you are still getting a 12 v at time of vtec also deppending on your computer if the knock sensor is out the check engine wont lite at start up try checking thies two things

 

how do you know its not engaging??? just cause you cant hear it???

Landon

 

yea. i cant hear it or feal it! dont think i dont know what vtec sounds like. i just changed manifolds so vtec should not have changed so much!

 

are you sure the tone change that you think is vtec, isnt the secondaries???

Landon

 

how long has it been since you put new oil in it? I know sometimes old oil will cause the solenoid not to function properly.

 

i am going to buy a new battery and get my oil changed today. hopefully that makes a difference!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BLACKEG2 &raquo;</TD></TR><TR><TD CLASS="quote">i am going to buy a new battery and get my oil changed today. hopefully that makes a difference!</TD></TR></TABLE>

i hate to burst o your bubble but that wont help. your vtec is probably working fine, your just not hearing it. if it wasnt working then you would get a cel.

Landon

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boosted_dc2 &raquo;</TD></TR><TR><TD CLASS="quote">are you sure the tone change that you think is vtec, isnt the secondaries???

Landon</TD></TR></TABLE>

Bingo.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boosted_dc2 &raquo;</TD></TR><TR><TD CLASS="quote">

i hate to burst o your bubble but that wont help. your vtec is probably working fine, your just not hearing it. if it wasnt working then you would get a cel.

Landon</TD></TR></TABLE>
So by changing my manifold will make the vtec sound go away completly. I am telling you my vtec was real loud. i have no dumptube. since i put on the new mani you cant hear ****. and when vtec should engage my car bogs! I dont know why im not getting a CEL. I just dont know what else it is!
Thanks

 

I wasnt throwing a CEL. But I knew it wasnt coming on because I couldnt hear it at all. This is when I was NA and had a short ram intake. That **** was loud when VTEC would crossover.

But what I mentioned earlier fixed my problem.

Have you tried replacing the VTEC Solenoid? Maybe your not getting enough oil pressure. Check the oil level and change the oil to

Jon

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boosted_dc2 &raquo;</TD></TR><TR><TD CLASS="quote">are you sure the tone change that you think is vtec, isnt the secondaries???

Landon</TD></TR></TABLE>

secondaries huh?? maybe we should check those, oh wait its a b16a, lol

we put straight 12v to the solenoid and it clicks, so now i think we are gonna try the oil pressure switch

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Timmay &raquo;</TD></TR><TR><TD CLASS="quote">

secondaries huh?? maybe we should check those, oh wait its a b16a, lol

we put straight 12v to the solenoid and it clicks, so now i think we are gonna try the oil pressure switch</TD></TR></TABLE>

sorry im not a mind reader, im trying to learn how but its hard to do. plus allot of people think the secondaries is vtec.

Landon

 

He did say b16a3 in the first post, but whatever. For any future problems that you may have with VTEC, I recommend installing a vtec light, this helps to tell you if the ECU is sending the signal for VTEC or not. Some people say they are annoying, but I love mine, and I won't get rid of it. And, whenever I get a CEL or some problem (one that effects VTEC, the light won't kick on at 4400rpm's, then I deffinately know there is a problem)

 

Did you accidently unplug the speedo sensor or something? Doing that will cause VTEC not to engage, not to mention your speedo and mileage wont work either.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by m R g S r &raquo;</TD></TR><TR><TD CLASS="quote">He did say b16a3 in the first post, but whatever. </TD></TR></TABLE>

oh, my bad. i must not have seen it it was late.

Landon

 

we can unplug the vtec solenoid and the car feels the same. you can tell when vtec doesnt kick

 

Speedo still works so it couldnt be unplugged. god i know it will be an easy fix i just want to know whats going on. we are going to try a whole other solenoid tomorrow and see what comes of that.
Keep throwing me ideas on what it can be.
Thanks

 

You said you cleaned the vtec solenoid but did you clean the filter that comes before it as well? Just checking.