All of a sudden I have no 1st stage and unsually very very weak and loud vtec that engauges 500 rpm later. The car is a gsr head on a b20 block. It just got a new headgasket, plugs, and valve cover gasket. What are the symptoms of a dying vtec solenoid, thats the only thing I could think of...


Modified by motormike40 at 4:43 AM 4/8/2007

 

VTEC either works or doesn't. There is no half VTEC.

If you are down on power, your problems are either fuel or ignition related.

Make sure you set your timing right.

Worst case scenario, you installed your headgasket incorrectly and are pooping out compression.

 

I know its just skips the 1st stage and goes on, Also the rpms are slow to climb after 4500, It just started in mid drive. One time I shut the car down and started it back up and let it idle as I coasted, and it worked that one time.

 

Are you sure you aren't confusing the secondary butterflies on the intake manifold for VTEC?

VTEC only has ONE stage.

Check your oil.

 

I have a vafc, and 1st is set for 4100 and I guess real vtec is 5600. Ill take a look at my oil. Thanks alot man.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by motormike40 &raquo;</TD></TR><TR><TD CLASS="quote">I have a vafc, and 1st is set for 4100 and I guess real vtec is 5600. Ill take a look at my oil. Thanks alot man.</TD></TR></TABLE>

Again, VTEC is either on or off, it does not have 1 or 2 stages. If your VAFC has VTEC set at 4100 rpm, that's when it will engage, regardles of what the ecu was set at (5600 rpm?) because the VAFC overrides the ecu.

Your cam timing could be out, ignition timing, fuel settings and VTEC engagement point could be set at the wrong rpm point causing the lag in power you're describing. Do the simple things first, like checking your oil level, checking your ignition timing and fuel pressure and setting. If they all look good, get your car to a dyno and have it tuned properly, I'm sure you'll quickly find out where the problem is. More than likely it's in the tuning.

 

Oil pressure, and fuel pressure are fine, I do have the advanced timing blip in my exhaust, but thats been there since ive had the car. Its all of a sudden vtec hits very loud and weak. Could it be a bad solenoid? There is also a vss from a y8 Ej6 in it now.


Modified by motormike40 at 1:48 PM 4/8/2007

 

I will reiterate for the last 4 guys who tried to help you out here and you fail to understand.

IT WILL EITHER WORK OR NOT!!!!! There is no solenoid problem, no stage one or stage two.

If it's loud and weak, it means it's crossing over but not going anywhere so start looking elsewhere like timing and fuel as you were told before. The Solenoid and VSS are both working fine if it's crossing over.

 

So why does my car open up at 4400 and opens again at 5600? 4400 is strong and loud vtec, and 5600 is not as loud and about the same in strength.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by motormike40 &raquo;</TD></TR><TR><TD CLASS="quote">So why does my car open up at 4400 and opens again at 5600? 4400 is strong and loud vtec, and 5600 is not as loud and about the same in strength.</TD></TR></TABLE>

You have a GSR P72 head correct? That means you probably have a GSR intake manifold with the two stage runner. VTEC will activate at one point...which on a stock GSR is 4400 RPM's. At 5600 RPM's, the secondary butterflies route the air from the long runners to the short runners in the intake manifold, further boosting power and an obvious change in intake tone. That is not called VTEC.

 

some people just dont get what your trying to say, but the secondary butterfly system is junk i put a skunk2 pro series on mine and it made a world of difference. although it made my car run lean, leaner is meaner...let 'er eat!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackGSRcoupe94 &raquo;</TD></TR><TR><TD CLASS="quote">some people just dont get what your trying to say, but the secondary butterfly system is junk i put a skunk2 pro series on mine and it made a world of difference. although it made my car run lean, leaner is meaner...let 'er eat!!!</TD></TR></TABLE>

yea meaner until the motor eats its self

 

maybe you should try porting your vtec solinoid for better flow

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jeffsciv23 &raquo;</TD></TR><TR><TD CLASS="quote">maybe you should try porting your vtec solinoid for better flow </TD></TR></TABLE>

Why waste time posting something stupid like this? Now you have just helped spread more misinformation around Honda-tech. As stupid it sounds there are actually people out there that will try this and think its possible.

 

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

Why waste time posting something stupid like this? Now you have just helped spread more misinformation around Honda-tech. As stupid it sounds there are actually people out there that will try this and think its possible.</TD></TR></TABLE>

my bad, i figured he would know it was a joke.

 

LOL

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by motormike40 &raquo;</TD></TR><TR><TD CLASS="quote">All of a sudden I have no 1st stage and unsually very very weak and loud vtec that engauges 500 rpm later. The car is a gsr head on a b20 block. It just got a new headgasket, plugs, and valve cover gasket. What are the symptoms of a dying vtec solenoid, thats the only thing I could think of...


Modified by motormike40 at 4:43 AM 4/8/2007</TD></TR></TABLE>
from what you said your vtec isn't activating....its your secondaries

 

you sure your motor isnt a b16?

 

this may sound really stupid but check your catalitic converter. it may be cloged really badly and now restricting air flow. this would not be the first nor even the second time that i've heard of that this was the culprit.

give it a try, its free and easy to check.

 

Ok, cool Im getting the timing reshot tomm, I didnt know that the gsr's had that stock, I've been in plenty k20s and other b series and none of them did that. Yea Im definitly getting rid of that stock gsr IM for the S2 one. Ill def give the cat a test also, i didnt think of that. OH yea and the motor definitly is a b20 block on a ported and polished 5 angled with Ti lifters, and retainers gsr head, close to B16 though, haha. Thanks for all the info. Peace

 

unfortunately you only have vtec...not mad tyte vtec.

 

would that be nice. Well when I got my head gasket replace my mechanic knocked my cam timing out, so it's back with him and he's re-shooting it. Thanks everyone for the info.

 

Well timing is set

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by motormike40 &raquo;</TD></TR><TR><TD CLASS="quote">would that be nice. Well when I got my head gasket replace my mechanic knocked my cam timing out, so it's back with him and he's re-shooting it. Thanks everyone for the info.</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by motormike40 &raquo;</TD></TR><TR><TD CLASS="quote">Well timing is set</TD></TR></TABLE>


Knocking your cam timing out and knocking your ignition timing out are two different things. Make sure both have been checked and set to the proper specs which is done differently and seperately. Either one being out will cause sluggish performance like you described.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by motormike40 &raquo;</TD></TR><TR><TD CLASS="quote">So why does my car open up at 4400 and opens again at 5600? 4400 is strong and loud vtec, and 5600 is not as loud and about the same in strength.</TD></TR></TABLE>


your vtec hits at 4400rpm and your secondary on the intake manifold opens at 5750rpm which in most cases people think its "vtec" but its not.