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VQ35HR Mods and Support related to the 2007/08 High Revving VQ

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Old 11-26-2017, 05:07 PM   #1
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Default HR rough idle

08 HR 90k miles...on start car has really rough idle and dies

throws multiple misfire codes

Iíve cleaned the MAFS and throttle bodies

anyone have any ideas?
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Old 11-26-2017, 05:23 PM   #2
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Try more basic troubleshooting......what makes the engine run. Air, fuel, spark..... start there, then look to sensors
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Old 11-26-2017, 05:47 PM   #3
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So far i have

Cleaned MAFS
cleaned throttle bodies
swapped plugs
swapped coil packs
emptied the gas tank and put new fuel in it
O2 sensors are getting the correct voltage
Camshaft sensors also get correct voltage
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Old 11-27-2017, 02:44 AM   #4
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What mods, any codes?
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Old 11-27-2017, 11:23 AM   #5
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No mods

p0300 code

im going to clean the fuel system today and see what that does
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Old 11-27-2017, 11:28 AM   #6
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did you open the butterflies manually in the throttle bodies?
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Old 11-27-2017, 12:07 PM   #7
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No i didnt
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Old 11-27-2017, 12:18 PM   #8
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No i didnt
good. when you changed the plugs, did you accidentally swap a couple coilpack wires?
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Old 12-04-2017, 01:58 PM   #9
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So since i last Posted i changed The plugs...put a new fuel pump in and new air filters.....

i relearned the idle throttle positions and ECU

the car now runs and idles fine...when i drive it and apply the throttle it bogs down
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Old 12-04-2017, 02:02 PM   #10
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Thereís no vacuum leaks as well
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Old 12-05-2017, 11:15 AM   #11
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Default HELP

so i posted on here recently with little help...so letís try this again

i got in my car one day to drive it and it idled horribly and would die...got to the point where it wouldnít even start

hereís a list of everything Iíve done

new fuel pump
new plugs
new coil packs
cleaned MAFS
cleaned throttle bodies
new gas
new air filters
relearned the idle,throttle position, and ECU

So now the car fires and idles right...but when you drive it and the throttle is under load it stumbles on itself...

any suggestions? Cam sensors and CTS are my next purchases
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Old 12-05-2017, 11:19 AM   #12
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starting a new thread isnt going to do anything

https://my350z.com/forum/vq35hr/6179...ough-idle.html
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Old 12-05-2017, 11:31 AM   #13
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Maybe your comments should be a little more helpful? If you donít have a suggestion to the issue shut the **** up and move on
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Old 12-05-2017, 11:32 AM   #14
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starting a new thread isnt going to do anything

https://my350z.com/forum/vq35hr/6179...ough-idle.html
This. ^^^

In the future, please go ahead and just bump your existing thread, especially since it's only a few days old. Dup posts are NOT going to get you answers any quicker than a refreshed original thread and causes confusion. People are busy, you cannot always expect an immediate, right now answer. Thanks.
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Old 12-05-2017, 11:36 AM   #15
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Continous comments with no help....rather than explaining the game that is a forum....maybe....help?
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Old 12-05-2017, 11:39 AM   #16
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Quote:
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Maybe your comments should be a little more helpful? If you donít have a suggestion to the issue shut the **** up and move on
maybe quit being a little bish and take it to nissan for a proper diagnosis, nobody will be able to diagnose your car from behind a monitor and keyboard
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Old 12-05-2017, 11:42 AM   #17
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Originally Posted by Gr8tobet8 View Post

any suggestions? Cam sensors and CTS are my next purchases
Stop throwing parts at it and diagnose it properly. If you don't have the skills to do so bring it somewhere where they do.
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Old 12-05-2017, 12:12 PM   #18
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Continous comments with no help....rather than explaining the game that is a forum....maybe....help?
Let me explain something here. My responsibility to this forum is to keep it organized and free of clutter. I asked that you not dup post as part of my "job"; and politely I might add by even saying please and thank you in case you didn't notice.

The people that have responded on this thread are always very good sources of information - don't whine when people either don't know the answer or won't attempt a virtual diagnosis without putting hands on it.

If you can't respect that and are expecting instant gratification and results from your posts here, take it somewhere else.
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Old 12-05-2017, 12:23 PM   #19
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The people that have responded on this thread are always very good sources of information
He's referring to me. I'm the best
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Old 12-05-2017, 12:27 PM   #20
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He's referring to me. I'm the best
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