P0300 / Engine RPM speed @ idle

red6spd · 03-12-2013, 02:56 PM

Yea that idle is not correct. I got this same code and symptoms last year and could not find the problem. I cleared the code and the CEL went away and the car started to idle fine. Now for the longest time I had a huge throttle delay problem and finally decided to bring the car to RAD (a tuner in my area) to find out the problem. This is all after the CEL problem. They found out the car was running improper AFR's on bank1 and bank2 due to a exhaust leak. I know you said you check for them but just be 100% sure cause I think that's what my problem was.

SouthArk370Z · 03-12-2013, 03:01 PM

I found this.

Edit: Google "P0300" for more fixes.

Cmike2780 · 03-12-2013, 03:28 PM

Quote:

Originally Posted by red6spd

Yea that idle is not correct. I got this same code and symptoms last year and could not find the problem. I cleared the code and the CEL went away and the car started to idle fine. Now for the longest time I had a huge throttle delay problem and finally decided to bring the car to RAD (a tuner in my area) to find out the problem. This is all after the CEL problem. They found out the car was running improper AFR's on bank1 and bank2 due to a exhaust leak. I know you said you check for them but just be 100% sure cause I think that's what my problem was.

Come to think of it, I did notice a slight hiss whenever I lifted off the throttle last week. It went away so I didn't think anything of it. The Borla CBE has slip joints, maybe one of them came loose a bit. I guess I'll have to double check and re-tighten. Hopefully this fixes it.

On a separate note, do you go to the Wed night meets at RAD? I've been meaning to go but the weather has been crappy and/or I've been too busy to go.

red6spd · 03-12-2013, 05:21 PM

Quote:

Originally Posted by Cmike2780

Come to think of it, I did notice a slight hiss whenever I lifted off the throttle last week. It went away so I didn't think anything of it. The Borla CBE has slip joints, maybe one of them came loose a bit. I guess I'll have to double check and re-tighten. Hopefully this fixes it.

On a separate note, do you go to the Wed night meets at RAD? I've been meaning to go but the weather has been crappy and/or I've been too busy to go.

I have not been to them in a while. The Z has just come out of the garage for the year and I recently started a new job so I have not had much free time but if the weather is nice the Wednesday after this coming Wednesday I will probably go since I will be off.

03-12-2013, 02:56 PM	#1 (permalink)
red6spd A True Z Fanatic Join Date: Apr 2010 Location: Long Island NY Posts: 3,277 Drives: 2010 Z Coupe M6 SPT Rep Power: 22	Yea that idle is not correct. I got this same code and symptoms last year and could not find the problem. I cleared the code and the CEL went away and the car started to idle fine. Now for the longest time I had a huge throttle delay problem and finally decided to bring the car to RAD (a tuner in my area) to find out the problem. This is all after the CEL problem. They found out the car was running improper AFR's on bank1 and bank2 due to a exhaust leak. I know you said you check for them but just be 100% sure cause I think that's what my problem was. __________________ 2010 Base+Sport 6spd: Stillen G3, FI Non-Resonated CBE, FI Non-Resonated Test Pipes, UpRev Tuned, Custom 24R Oil Cooler, JDM Rear Fog-OEM Harness. ???Whp ???WTQ (Will find out come spring time)

03-12-2013, 03:01 PM	#2 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	I found this. Edit: Google "P0300" for more fixes. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

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