supposedly this motor is a jdm b16 and it only has 38k on the clock....it is swapped into a crx si and has a few mods.......but anyways, vtec doesn't engage, he said it is the "speed sensor" and it's simple to put in? could that be true? or could it be something else? I didn't see any check lights or anything like that come on......motor sounds legit, doens't tick, knock ect......idles fine and so forth......but other then codes if it has any which I didn't see, could it be a speed sensor? and if it's not that what other symptoms could it be? He's selling the swapped rex for like 1500 which seems like a good deal even it does take some work to get the vtec to engage.....it already has a throttle body, edelbrock manifold, greddy exhaust and a intake........and it seems to run nice.....anyways, is this a good deal? and what all do I need to check for the vtec to engage?

I really appreciate ya'lls reponses, sry for the long post...but i'm trying to do some my research through post and i've been searching.....thanks : )

later

 

its not the speed sensor that wouldnt do anything to vtec... it could be a few things.. vtec solinoide(rarely is that what it is) The wiring for vtec( almost always what it is) or the ecu ( seen it happen a few times) its not a big deal imo if you can just do some research online im sure you can figure it out if you guy the car good luck

 

see, i'm not too honda literate yet, but i'm gettin there.....but he told me that a jdm b16 vtec is operated on speed not rpm.......is that true? I don't have the car sitting in front of me and the only way I could diagnose it more then what he said is if I went up there again and looked at a couple of things....if anything, i'm buying the car for 1500.......if it came down to it could 500.00 or less repair to where it's supposed to be?

and also, it has a edelbrock intake mani on it now, but from what I hear it's only good for boosted applications......should I change that out to a stock mani?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lshatch1.8 &raquo;</TD></TR><TR><TD CLASS="quote">its not the speed sensor that wouldnt do anything to vtec..</TD></TR></TABLE>

I'm sorry,You are incorrect...
from the vtec supplement:

The four factors that control VTEC engagement are:

1.Engine RPM over 5,300 rpm
2.engine load
3.vehicle speed over 30km per hour
4.water temperature. over 60 degrees Celsius

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 88DXCRX &raquo;</TD></TR><TR><TD CLASS="quote">

I'm sorry,You are incorrect...
from the vtec supplement:

The four factors that control VTEC engagement are:

1.Engine RPM over 5,300 rpm
2.engine load
3.vehicle speed over 30km per hour
4.water temperature. over 60 degrees Celsius</TD></TR></TABLE>

You forgot oil pressure

 

How is this true if you have a cable speedometer? I don't have an electric VSS and my VTEC engages...

 

because the spedometer is connected to your ecu, and if your cable is broken/not working then the speedo isnt sending a signal to the ecu that you are over 30km/hr and therefore will not engage

i know from experience

 

thats werid i had mine out in my hatch and it still would hit vtec...... its werid to think it would have anything to do with it but im not an expert and was just trying to help the guy out... If anything go up there with a bit less cash and offer it to him and tell him since you have to fix the vtec youll pay less..

 

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

I just copied what the supplement said...
But oil pressure,Sure,That is pretty much a given...
That is what actuates the system..

But if you don't have oil pressure,
Not having VTEC is the least of your worries..

This is the speed sensor in a cable driven speedo

 

well i'm hoping I do have oil pressure......I let this car run for a good 20 minutes til the temperature gauge was almost sitting in the middle...........I didn't hear any tapping, ticking, or knocking....but for all I know he could've put some thick *** oil in it lol.......I doubt it, but ya kno......how would I be able to tell if the oil pressure is down? other then noise?

 

The only real way is an Oil Pressure gauge, or if your VTEC dosen't engage hahah... j/p

Me and a friend of mine was working on his B18c swapped EG. Sometimes it would hit VTEC when on 4th or 5th or high engine load, but rarely. We took apart the VTEC solenoid and made sure it was in working order, after that we did a complete flush and change with Mobil 1 Synthetic. 3 days later hes hitting "mad vtak yo"

 

hellz yeah mad vtak wOOt!

lol aiight, well if the motor isn't making any noise does it seem like 1500 for a si that has a b16 worth it? or should I try to widdle him down a lil? because of the repairs? plus the interior needs a good bit of work ect...

 

Ok, so here's what you need to go do before you buy that CRX. Take it for a test drive without the owner. Tell him you are going to take it to your mechanic. After you get a couple of blocks down the street, (out of sight) pop the hood. Put the VSS cable in to the tranny, provided there is still a VSS cable still in the engine compartment. It's kinda tricky if you don't know what you are doing. You have to pull back the outer shielding until you have exposed the cable and it's metal housing (looks sorta like a big pen in a way). With the shielding pulled back slide the the tip of the cable back into the "PEN" and slide the cable into the VSS in the transmission. Now pull the shielding back over the "PEN" and you should be set, once again provided therein lies the problem and there is nothing wrong with the cable and that it is plugged into the back of the Cluster in the interior of the vehicle.

Here's a picture of the VSS plugged in the transmission:



EDIT: Thanks to 88DXCRX








Modified by crxtreme89h at 9:53 PM 1/19/2006


Modified by crxtreme89h at 9:54 PM 1/19/2006

Pictures taken from this link:

https://honda-tech.com/zerothread?id=1325930


Modified by crxtreme89h at 9:55 PM 1/19/2006

 

There are some good pictures
of the speedo cable connection located
at the bottom of this thread:
D series but it is the same principal..
https://honda-tech.com/zerothread?id=1325930

 

double check the wiring

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crxtreme89h &raquo;</TD></TR><TR><TD CLASS="quote">Ok, so here's what you need to go do before you buy that CRX. Take it for a test drive without the owner. Tell him you are going to take it to your mechanic. After you get a couple of blocks down the street, (out of sight) pop the hood. Put the VSS cable in to the tranny, provided there is still a VSS cable still in the engine compartment. It's kinda tricky if you don't know what you are doing. You have to pull back the outer shielding until you have exposed the cable and it's metal housing (looks sorta like a big pen in a way). With the shielding pulled back slide the the tip of the cable back into the "PEN" and slide the cable into the VSS in the transmission. Now pull the shielding back over the "PEN" and you should be set, once again provided therein lies the problem and there is nothing wrong with the cable and that it is plugged into the back of the Cluster in the interior of the vehicle.

Here's a picture of the VSS plugged in the transmission:

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

Why tell him to do all of this? If the car is reading how fast he is going, then he doesn't have to pull the speedo cable. Most likely it is just wired wrong. Just get the wireing diagram from this site and see if it is correct.
What ECU is in the car? If you don't know, then pull back the carpet on the passenger side and read whats on the side of the ECU. Once you have that, let us know.

 

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

Why tell him to do all of this? If the car is reading how fast he is going, then he doesn't have to pull the speedo cable. Most likely it is just wired wrong. Just get the wireing diagram from this site and see if it is correct.
What ECU is in the car? If you don't know, then pull back the carpet on the passenger side and read whats on the side of the ECU. Once you have that, let us know.</TD></TR></TABLE>

He never said that the car was reading how fast he was going.

I ran into this very problem 2 weeks ago when I accidentally unplugged the VSS cable it from my transmission. LO AND BEHOLD the VTEC did not kick in until I put it back into the transmission correctly.

I never said that this was the only reason why VTEC was not kicking in. I listed this as an easy fix option.

Your RPM's will still work, but your Speedometer will not. I believe at a certain operating temperature combined with your RPM's at or around 5200 VTEC will kick in provided everything is in working order including, but limited to the VSS cable plugged into the VSS in the transmission.

 

man, you all are a great help. this guy lives about a hour from me........I wouldn't be able to take this thing for a test drive until a axle is put in.....I drove it around his lil parking lot but then the axle popped out lol.......it has the wrong axle in it to begin w/.

well, I just got off the phone w/the guy, and he isn't trying to put in the axle or anymore "time" in it......so it comes off kind of shady...but ya never know....if he does put the axle in, i'd be alot more at ease because I would get to drive it around and get a good feel for it : )

but anyways, i'll let you all know what's going on....thanks for the help fellas : )

 

Let us know if the Speedometer is workin. If it is, then you can rule the Speed Sensor out for VTEC not kicking in. What axle is he using and who put the motor in?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 88DXCRX &raquo;</TD></TR><TR><TD CLASS="quote">
2.engine load</TD></TR></TABLE>

I've never heard of engine load being something that hinders vtec.

 

Look in the VTEC supplement under page 5-10..
Engine&gt;construction and function&gt;VTEC system

If you don't have the supplement,one of these links should..
Look here: http://www.google.com/search?h...earch

 

i'm in morgantown, get it up here and i will get vtec working, or at least diagnose the prob. if its wiring i can fix it as well. my buddy has a b16 and extra parts laying around as well, ecu, solenoid, etc. pm me if interested

 

i'd love to come up there, but this guy isn't trying to put in this axle so I can drive it around or w/e..........and I work all day so it's really hard for me to get up there and try to put an axle in the dark/cold.......grrrr this guy is stubborn

 

well eityer way the offer stands

 

Rev the motor a tad and put 12v to the vtec selenoid. It should kick in. and a quick way to test everything engine wise. Then its wiring / speed issue.