In some serious trouble, it broke...
 

Well as life goes its you know what on me...It 10days before I get my car tuned and just started having a major issue last night, was driving along and the car developed a harsh, I mean harsh vibration most pronounced at 2k rpms, its like a bent wheel but worse, I am thinking it is internal in the engine, which would suck, and I would probably part the car, fix it and move on with life, just because this stuff seems to happen to me.
some info: Its on the BP turbo kit, wastegate spring pressure, AFR is fine never when out normal, I checked the log. The car does not have to be moving, does it on a lift(there now) clutch in or out makes no difference. THe engine seems to run fin, no codes, sounds normal as ever. Any insight would be great...I also have z1 mounts, nothing came loose or anything of the sort, vibration seems to carry excessivly to the front of the transmision, but I peared into the check hole, nothing looks out of kilter to the untrained eye...sigh, maybe this is a sigh, time to quit.

Are you sure it's internal? Could something be loose/rubbing on something else? I would think that something this noticable would at the very least throw a P0300.

Driveshaft out of balance?

that's what she said
owait :wtf2:

Ya I would.think it would throw a code I been prying on stuff all morning in hopes to fine something stupid no luck so far. It does it with the car sitting no driveshaft movement

Ouch, I hope it's an easy fix man. No codes and if your motor is good it shouldn't be too detrimental, don't get discouraged

Without any codes, or any readings out of place my wild *** guess is that it's not anything terminal. With as much new piping as you've put in a small space, I'm guessing it's a clearance issue. How much did swapping the header flange change the piping downstream? Is everything still in the same place?

If it was a crank vibration your crank angle sensor would pick it up. Did you get the tune from Sasha? Might not be a bad idea to check with him to see if the P0300 code is turned off with the uprev? I know for a fact that even with my launch control on my car does not throw the P0300. I would suggest flashing it back to stock (only to idle it) and seeing what type of codes you have at that point.

The car should start and idle even with the aftermarket injectors, its a quick easy check for you.

Hope that helps,

Goodluck!

Even if the P0300 was disabled, an internal engine problem would still generate the cylinder-specific misfire code, right?

Not that it is doing any good, just took the IM off, going to check all the plugs and look around for anything fishy...

I think Nissan would like to think so, but I doubt it would in reality work like that.

I'm just going off what my tuner explained to me. I could be way off base.

I know, I am just going off my knowledge of other vehicles. I really could not say one way or another if the Z would pick up on specific misfires accurately enough to trip a code. I could be wrong.

Either way it was just an idea for the OP to try out.

:tiphat:

Yeah, we're all just spitballing without a video or some kind of recording.

In for video

Nothing yet, plugs look brand new, ndicating nothing, all injectors pluged in, and there was a sh#t tone of fuel pressure when I relased it. did a comression test for the hell of it, 210-215 accross the board...Im hoping my car is playing and april fool joke on me, but its not funny, at all. You wont really see a vibration in a video but after it is together I will be more than happy to.

I've got my fingers crossed you've just got something making contact and it's an easy fix. So far everything you've listed is pretty encouraging.

yes but the whole engine, trans,exhaust the whole thingis vibrating vilolently....going back together after somelunch and ill take some videos, this is so depressing ill tel ya.

Drop the oil and check for metal?

Ill do that....ugh

Other than the vibrating does it drive normal? Could it be you lost a portion of the friction plate on the clutch disc? I know you mention it didn't change much whether clutch was engaged or not but just trying to come up with something.

And you say its just a vibration and not a clashing noise right? I know one dead cylinder could cause a pretty noticeable vibration, maybe try pulling plugs one at a time to see if there is a faulty spark plug, or possibly a faulty injector.

High and consistent compression means that your rods are fine, metal shavings should tell you if a lower bearing went out (although I would expect more noise out of it). Maybe something crazy went wrong with the flywheel? Although that crank angle sensor on the flywheel is very sensitive and if that was the case the car probably would not start.

Did you try reading codes just to see if Uprev can pull anything out that might not be throwing a code?

Also you said you have engine mounts, any chance one of them broke? One faulty engine mount would cause all sorts of issues.

severe engine component failure generally comes with a lot of noise, not just vibration. i see you have all aftermarket motor/trans mounts. make sure none of them came loose. Check your crank pulley is on straight and tight. Check coil wiring and try and determine that all 6 cylinders are firing

:iagree:

None of the things that have been posted here scream "blown motor".

did you disconnect and then re connect one plug at a time to try and locate if it is a single cylinder or if its random? when you disconnect each coil it should change how the engine runs, if you find one or two that when you disconnect them nothing happens you will have found the cylinder you are looking for, then just figure out whether it is spark or fuel. If you have cats it doesn't sound like a blown cat does it?

No kitty cats on the BP kit. The turbo is in the way :)

haha

It is hunting for a idle now and set a temporary dtc for p0507 idle high...runs no different that before, confirmed there is fuel pressure, and a lot of it. Im gonna go insane here ina quick minute.

Yes, I pulled the coils one at a time, also swapped the plugs and coils sideto side, I ohms tested the injectors(not a great test I know) all around 12. I have the check plate off the bell housing and all looks ok to me.

I would try sticking a jack under your engine and slightly trying to lift up on it and look for play at each of the engine mounts.

:iagree: Seems like all the key 'something major is wrong with my engine' checks are coming up empty. Looking more like you are rubbing somewhere you just can't locate or a mount went out.

Those Z1 mounts are rebuildable. A call to Jon to ask what the symptoms would be if one let go might be an idea too.

Im about out of ideas, im posting a video but again its hard too see the issue in the video... mountsare tight a pryed on everything over and over again.

Any metal on the drain plug?

The high idle sound like an air leak. Check your vacuum lines and possibly replace the 5 manifold gaskets. Checking the mafs and the couplers behind them wouldnt hurt

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If the internal poly structure of the mount came apart, would they still be bolted in tight? Looking at the cutaway on the Z1 site, if the poly failed you'd have a crappy metal mount that would vibrate all to hell. Also, are the welds on the new header flanges in good shape?

One of my techs a work looked at it briefly and does nto believe it is air/fuel related, he describes itas something off balance, the pulley looks fine, the flywheel looks fine through the check plate. Life hating engaged.

gonna drain the oil now.

If you don't find anything in the oil I would take a look at your manifold again. check the hose connections, and the pcv valves, anywhere extra air could be getting in. Did you check the codes with a generic scan tool or with consult3? there are a whole bunch of codes that GST's cant read, might be worth having it checked with consult

Can't you spray some sort of carb cleaner to see if it affects idle?

I got a idea while thinking about it. What is the chances you put 1 of the 2 MAFs in backwords? This would cause a whole whack of unmetered air to enter the engine resulting is a pretty big mess I would assume.

Worth a look.