S14 Sr20det vvt problem

[mystacarlo]

Anyone knows how to check the vvti solinoid to make sure its working?

[Monooxide]

It's in the FSM. This should also shows everyone who doesn't know that VTC is for low-end torque and emissions.

http://img12.imageshack.us/img12/1565/vtcks1.jpg

http://img264.imageshack.us/img264/9918/vtc2fh5.jpg

http://img15.imageshack.us/img15/6338/vtc3td4.jpg

[mystacarlo]

thank you soooo much my good man

[sil180sx]

i was wondering......... i did check the soleniod and i changed out the sprocket ,..... i was wondering if there is a certain wire thats supposed to go connected (vtc) cuz i still have the knocking or slapping or whatever its called... i changed otu the sprocket three times already and still same noise... someone mentioned about the saftey switch or something but im not sure what they are talking about... if someone can help me id greatly appreciate it!! ive been working on this for about 7 months already and cant find any conclusion on what it is... polease help me

[Z U L8R]

ya basically make sure the brown wire of the vvt plug is getting ignition 12 volts, it also ties into the blue/white striped wire and the light blue wire that power up other various sensors in the harness.

the other wire on the vvt plug goes to the ecu, that the ecu gives a ground in order to activate the solenoid.

with nistune or if you're using an rb20 or z32 ecu to run your rb25, you can get an adjustable digital rpm window switch that MSD makes, that are super easy to use and wire in. i recommend them on all the nitrous kits i install.

i don't have a part number, but they look like this, you can get em from summit
http://www.byunspeed.com/images/MSD8969.jpg

you can use those for other things also, like 2 step or launch control. basically you have an on rpm setting and an off rpm setting which it will either give a ground or take away a ground depending on how you wire it in to a relay etc to do different things.

oh, if nothing else you can use it as a digital tach becaue it will display your realtime rpm as well :) you can set it up in less than 30 seconds for a 4,6, or 8 cylinder.

i believe they're around $120-170 depending on where you get it. you can just google it to find a deal.

best of luck,
Dave

[sil180sx]

ok another question... i took it to a electrical shop and they tested it.... they said on idle... its gets power but no ground,..... when i start reving up the rpms... the ground comes in and quiets down everything..... another thing i wanted to ask was.... when the car is idling.... it makes the loud clacking noise... if i take off the plug and i put power and ground to the solenoid... everything goes away..... does this mean im supposed to just put a power and a ground wire to the solenoid or what???? this is on a s14 sr... like i said i switched the sprocket out twice already and the solenoid also but still the noise is there..... please help me... might there be something wrond with the harness? am i supposed to connect the safety switch from the transmission to the ecu for any of the vtc reasons?? idk please help me... this is my only car and i start school on monday... please help me

[Z U L8R]

your ecu is controlling it properly. it sounds like you have a mechanical problem. with all the times you swapped the cam gear...can you please double check that your chain timing isn't off even half a link (1 dowel)....an sr is an interference engine and perhaps when your vvt is engaged it is mechanically retarding your intake cam half a link's worth of timing because your timing chain on your intake cam is advanced half a link...or something's off by 1 or 2 dowel pins...

when your motor's at tdc, your cam lobes on cylinder's 1 will both point away from each other at a 9 and 3 o clock position. then if you lower your gaze and look flush with the top of the head you should have 8 dowels showing on the left of the dot on the intake cam gear, 5 dowels showing on the right of the dot on your exhaust cam gear. the timing pin on your oil pump will point at the second notch to the right on the crank pulley starting from the far left, because the far left notch = -5 degrees so the next mark over, which is yellow = 0 aka TDC.

then your camshafts will have the dots on them. those dots will be in the center of a chain link on both cam's. if you count the links starting with the one resting on the dot of the intake cam, you end up at the exhaust cam and counted 11 links. if you count the dowel's in between the dots you end up with 20 dowel's....

that's the only thing that makes sense, and is probable since the chain has been off a couple times....

when you're testing this and giving the vvt power/ground you're electrically modifying the timing mechanically and your noise goes away....that with the combination of the chain's been off a couple times would be the reason this is the first thing i'd double check.....

if you check the timing and it is how i describe.....then eliminate the vvt altogether by putting an s13 intake cam gear on it. if your noise goes away....great. if not then you know the gear's not your problem so you should dig deeper.

please pull your valve cover off and check, then report back with what you find....better yet. set it on tdc and post 2 or 3 pics plz.

and no your pnp switch has nothing to do with this.....

gl,

Dave

[sil180sx]

i believe it is off half a dowel i am pretty sure... but even then would that cause the loud knocking and slapping sound tho? the timing itself is never steady which im pretty sure is because of the timing links but just to double check with your opinion.... can you asure me??? also ... if i adjust the timing chain the right way,,, will that make the noise go away??

[Z U L8R]

it wouldn't matter if i gave you a million dollars to set your timing correctly, IT NEEDS TO BE SET CORRECTLY before you can go any further with diagnosing other problems.

can i assure you it will make your noise go away? can i assure you your hair dryer will blow hot once you plug it in the wall? no, first thing you need to do is plug it in, then if it doesn't blow hot we'll find out why.

i can assure you that i haven't asked for you to send me any money paypal, and i can assure you that if i was the technician working on your car that i would start by making sure the timing chain was on properly. and if it wasn't on properly i can assure you that i'd warn you that once the mechanical timing was set correctly that i would perform a compression and leakdown test on all the cylinders to make sure the motor hasn't been damaged internally. i can assure you that i sincerely would like you to get your car running correctly but if you're gonna ask for guarantees from me that i will make you ship the car to georgia and pay me to fix it properly....which i would give you a 12,000 mile 12 month warranty on :P

but anyways, enough with being sarcastic cause i'm not a malicious asshole unless provoked :P

whenever you diagnose a car, you always start with what you KNOW is wrong. if your problem is that you're bleeding and i'm trying to cure that, i'm not gonna pay no attention to the bullet wound that i KNOW is in your shoulder to spend time isolating any other blood from a scraped elbow.....i would take care of the bullet wound and THEN check for any other bleeding. it's the same thing with cars.

real mechanics test, not guess. if you KNOW your timing is off a link...why are you gonna waste any more time and energy guessing whether the problem is this or that when you have A problem staring you in the face. it just isn't logical.

fix your timing, then continue if a problem still exists.

i can assure you that you'll be in a better position to diagnose the car if/when your timing chain is set correctly....and hopefully no internal engine damage resulted from it being off....

best of luck,
Dave

[sil180sx]

ok so i set the timing on right finally and the noise is still there:( is there any other explanation to this?

[Z U L8R]

can you see any scarring from where the chain's been slapping?

is the plastic on the timing chain guide's good?

is there any casting flaws in the head that the chain's hitting?

is the chain tensioner good?

can you take a picture of your cams with the valve cover off and can you take a pic of the harmonic balancer on tdc please?

Dave

[sil180sx]

there are no marks on the valve cover from the chain slapping also the guides are still in good condition and the chain tensioner is brand new maybe like 400 miles old but how can i know if the chain isnt good anymore??? ill post pics up tomorrow but thanks lmk!

[Z U L8R]

really i just wanna see with my own eyes that the timing chain is on correctly now.

so was it off a link or something? what'd you have to do to fix it?

more pics the better

Dave

[jdm213]

Anyone knows how to check the vvti solinoid to make sure its working?

isnt vvti for toyotas:duh:

[sil180sx]

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this is exactly exactly how my car sounds... i read that this guy chaged the sprocket and it fixed his problem... the thing is i changed my sprocket with two different other ones and the sound is still there ?? i dont get it???? if i were to keep driving it would the sound go away?!?

[sil180sx]

YouTube - s14 SR20DET with VCT rattle (http://www.youtube.com/watch?v=95qdoK44zQg)


this is exactly exactly how my car sounds... i read that this guy chaged the sprocket and it fixed his problem... the thing is i changed my sprocket with two different other ones and the sound is still there ?? i dont get it???? if i were to keep driving it would the sound go away?!?

[S14DB]

If you changed the cam sprocket then it's the actuator.

[sil180sx]

If you changed the cam sprocket then it's the actuator.


but the actuator clicks when i put power and ground to it??? doesnt that mean its good? also when the car is on and i put power and ground the noise goes away

[S14Serge]

I would change out the VCT sprocket if you would like to keep the VCT...

If not get an s13 cam gear and call it a day...