Leaking or blown headgasket also with exhibit those symptoms.

 

i dunno this ground wire LINGO....all i know is the mechanic @ AWD took off the plug from the knock sensor thats on the block and plugged it in to a SPARE 1 and put it on the windshield. John aka JESTR agreed to it and didnt seem to say anything about ground wire.


ALL i know is, since i have changed my cams to the Kellford 272, i have had nothing but problems. Car will not idle with STOCK 9 BOV, APS BOV, or Forge DV BOV. Jestr tuning the car on any of these BOVs and the car still will not idle. Car runs 10.0 Rich @ idle. No boost leaks, tested @ AWD motorsports.

Closest i've gotten to get my car to idle is putting the Forge DV on the car and disconnecting the battery for 20 seconds to reset fuel map. The car then idles fine, but when i slam on the clutch and the BOV wooshes or lets all the air out. The car stalls once again.

let me tell u its been a HELL OF A NIGHTMARE!


and now on top of this the False Knock

 

Jestr and u have the same thought. But why would the car knock when the sensor is off the block completely

 

Jestr is my second cousin Its in the genes. Tell my cousin to call or write once in a while.

You did not read what I wrote. You cannot have the knock sensor off ground. Its not going to register. If you removed the whole knock sensor from the car, it would still show 8-9 counts all of the time.

With the additional information you have provided with idle problems and rich AFR, along with knocksums, it appears that whoever installed your cams quite possibly have bent your valves.

Especially important with Evo IX's, if you start them without oil in the MIVEC gear they can chatter around.

If on an Evo 8, one tooth off on a cam install and you are +/- 7.5* cam timing. Pistons hitting valves is enough to cause rich AFR, knocksums as the bent valvetrain chatters, and a car that is unable to idle correctly.

One would hope at minimum that you have checked cam timing and crank timing by someone other than the installer of the cams.

 

In January while being tuned by Jestr, i had the HKS 272 and Orthodox racing cam gears. While tuning we observed 1 of the cam gears woobling so we immediatly pulled the car off the dyno. We swapped the Cam gears for stock 1s. And changed camshafts to Kellford 272. Since the day i picked up the car, the car has never idled, the same. Jestr has tuned me on APS, Forge DV, and stock 9 DV. Closest i've had the car idle is by installed Forge DV and disconnecting battery. Car will idle fine, but then when i slam on the clutch the car will stall again, unless i give it gas to compensate. Car doesn't like HIGH BEAMS, FOG LIGHTS, A/C or anything that requires extra voltage.

 

Still sounds like bent valves, improper cam timing / timing belt off teeth.

The BOV won't have anything to do with the idle.

 

TTP is correct on the knock sensor needing to be grounded. Shame major shops like AWD and Jester wouldnt know this. The knock sensor has two wires, but one is a noise shield. The block is the ground that completes the circuit. On old DSM cars if you unplugged or unscrewed knock sensor the ecu would lock timing at 9 degrees. You can run a ground wire from bottom of knock sensor to chassis and the ecu should never see knock again. If you still are getting the 8-9 knock counts with sensor ground wire then obviously the knock sensor wire to ECU is faulty.

 

thanks for all your help, guess i'll start looking for engine harnesses

 

well my guesses could be a grooved piston,(hot spot) on one of the pistons from hitting the valves

 

doubt it remember, the knock sensor was on the windshield of the car and still knocked. So i think we've all come to the conclusion that it is the wiring harness.

 

YOU ARE NOT LISTENING. THE CAR WAS NOT KNOCKING. THE ECU WILL REGISTER 8-9 COUNTS WHEN THE KNOCK SENSOR IS NOT GROUNDED.

THIS WAS A STUPID IDEA BECAUSE IT DID ABSOLUTELY NOTHING.


If you would like to waste your money on a $1000 engine harness, feel free. The labor on installing it is a few hundred dollars as well.

You can ignore all of the signs, but it appears to be bent valves.

 

well try grounding it to prove TTP wrong, but he could be right tony

 

He is right.

 

It appears we are not the only one that knows what we are talking about.

 

Might be a possibility but the only 8-9 counts of knock i encountered with the knock sensor on the windshield was at idle giving it a little gas at 3800rpms. We had zero knock @ idle and zero knock before 3800-4000rpms and zero knock past that.

I'll take your word for it tho and ask Jestr and the people @ AWD motorsports tomorrow when they open, if they actually grounded the knock sensor down when they did this.