bad knock sensor?

[fenderguitarist]

well i got a tune from emance i sent it out cause of it running really rich at idle and cruise i decided to run the codes to today and i got a code 34 is there anyway i can check this out before i have to rip everything off to get to that sensor?

[fenderguitarist]

does anyone have a photo of where this sensor is at? is it even possible to get it without taking the intake manifold off?

[kguittar]

How did you end up checking this? Did you find where it was located? If so, let me know.

[the converted]

It is on the block under the intake manifold. Round thing with a bolt through the middle.

[fenderguitarist]

yeah i got it off by removing the starter and its a straight shot from there not hard at all.. but my richness problem is still there i cleared the ecu and got the all clear code 55 i dont know what else to do i have a tuned ecu and perfect fuel pressure and no codes to work off of what else can their be?

[the converted]

Well a few things I can think of that would make your rich are:

Bad ignition timingbad coolant temp sensorand your MAF sensor

I'm not sure that you have checked any of these yet so let me know.

[fenderguitarist]

i changed the coolant sensor a few months back cause i actually thought that was the problem too i did check the timing and thats on only thing left is maf ive cleaned it a couple times and nothing changed anyway i could check it? wouldn't it throw a code?

[the converted]

What is your timing set at, and are you checking it at a legitimate idle? What maf are you using? I'm also assuming stock injectors?

[fenderguitarist]

Yeah I did it correct the timing I believe is set for the stock 20 degrees I'm starting to think I cracked a injector I have a nismo fpr with a inline fuel gauge and after a hour or so of the car being off there is no fuel pressure it could be leaking past the pump but it seems to lean over to the injectors more. What do you think?

[the converted]

I would guess that you would slowly loose pressure if you had a leak or not. It would be worth the quick check just to pull the fuel rail and see if anything leaks when you put the key in the run position. You didn't say what maf your running either.

[fenderguitarist]

Oh yeah my bad its a stock maf stock injectors

[fenderguitarist]

Checked for injector leaks and they're not leaking. Also tried a new maf didn't make a difference either how should I go about checking the maf voltage and how much should it have?

[the converted]

zerothread?id=325660

[fenderguitarist]

when i wot it feels like the motor is struggling from 2-3k maybe a little higher then it goes away im gonna get one of them nissan consult scanners so i can check everything
Modified by fenderguitarist at 10:33 AM 8/22/2009

[codyace]

(easier for me to consolidate thoughts in a list)

1. Stock SR timing is 15 degrees, not 20

2. Do you have your gauge/fpr installed correctly? (Sounds simple, but happens).

Filter>gauge>Rail In>Rail Out>FPR>Return to tank

3. How do you know it's rich? Wideband or dyno?

4. You have NO vacuum leaks/pressure tested your setup?

Knock codes are a oddball stup, and IMO often caused by false knock to begin with.

[fenderguitarist]

well i did it by the fsm the 2nd to last mark i think im not sure if it was 15 or 20 but im positive that im right i did check it and its on i do have the fuel pressure gauge hooked up right reading about 42lbs im running a aem wideband and no vacuum leaks i did multiple boost tests