I still say put back the stock cams and go from there before buying anything else. Has anyone tried contacting Power Division and see if that has been an issue they have seen when changing the cams. Maybe the bigger Overlap on the cams may cause the low vacuum but all the other symptoms are a bit strange to just put the blame on one sensor, since this issue hasn't came up before.

This is straight from their catolog.


"The S3 Cams are available in a Solid Lifter profile (please email for options) and an off the shelf Hydraulic Lifter profile for the Evo 9 4G63. These cams are meant for the 700whp+ to take advantage of a very large turbo these are NOT suggested for anyone running smaller."

Lifter issues maybe......?

 

yea im not sure. that is what is throwing me off. all the weird symptoms im having. There are so many. but yea replacing the crank angle sensor should be replaced anyways regardless.

if it isnt that. maybe a bad ECU or something who knows. idk even how you check for that tho.

 

His car was running fine with them in the beginning. It started after making a couple passes at the track. There would be all kinds of racket under the valve cover if a lifter failed.

BTW, I started my IX the other day on the S3s and it seems to idle smooth and rev smoother than my S2s. I was actually surprised how well the car ran with them since they are supposed to be extremely aggressive. Hopefully, I'll get some more time next week for Tom to tune. I'm hoping to see over 850.

 

ya.. they are freak cams.

 

i think the cams have nothing to due with it due to it running ok for 200 or 300 miles before this issues started.

Im going to drop the car off at Tom's house tonight. Im sure he will find the problem and we will keep everyone posted. Im sure as hell curious what this problem is.

 

Updates?

 

nothing, were in a huge hurricane right now were i live. The car is at Tom's house i dont think he will even get to look at it till Thursday or friday.

 

Damn them hurricanes. Good luck man, stay safe.

 

That could definately do it as well. I still think you need to check the harness from the injectors to where the cas wiring joins it. All grounds meet there.

As for being rich when it started happening, if one of the injector wires is grounded on the ecu side of the circuit, the injector will never close fully.

Like I said earlier, had 2 IX's have this happen very recently.

 

that would cause 0 Vac tho?

 

You can check timing with the mark on the cam gear, but nothing guarentees the dowel is right on the mivec cam without removing the mivec gear. I had an issue once with a car, the intake cam gear bolt came loose, the cam jumped off the dowel, and then was tightened back down, basically smashing hte dowel. It looked in time, it was not. Very similar symptoms.

 

0 vacuum is cause by the 500 rpm idle, nothing more. You need to look for the problem with the idle, likely something that was recently worked on--could be that crank angle sensor as mentioned earlier--Check cam timing as mentioned. Once the idle issue is resolved the vacuum will increase to the rt level-- or at least will increase to where it was if you addressed the correct problem.

 

i planned on thoroughly inspecting the harness around that area. im curious what did you find when you checked? were there sliced up wires grounding each other out?

and you said this happened to two of your evo 9's? any idea why its happening to begin with? to tight of a bend / stretch for that specific area of the harness?

ill check the car out sometimes either this weekend or early next week.

im going to put a maf rom on it and my maf and see what happens that way i am not fighting against speed density.. speed density is stupid when it comes to auto tune.. simply because it doesnt exist.

so if theres an issue with AIR not entering the engine due to a massive leak somewhere the SD wont beable to adjust, where as a maf can.

ill post back once i start to inspect / look into the vehicle.

thanks guys.

 

My car is POS end of story .. Starting bid $1,000

 

wow this is still unresolved...i know the O.P is going crzy.