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-   -   Engine Start High RPM o.o? (http://www.the370z.com/nissan-370z-general-discussions/39375-engine-start-high-rpm-o-o.html)

Cafiax 07-11-2011 06:54 AM

Engine Start High RPM o.o?
 
When I start my engine in my 7AT usually after it has been off for a couple hours the RPM is idling at around 1.5k-2k and when I put it in Rear or D it goes back down to around 0.5-1k. Is there something wrong with it or is it just me? I realized the increased sound after getting my F.I HFC and CBE installed. It might have been the same before but since the sound increased I paid more attention to the Tachometer. O.o I can get some pics the next time I'm in the car if that's more help. I'm just worried that the possible increase in RPM will damage my transmission.

ChrisSlicks 07-11-2011 07:09 AM

It is perfectly normal for the car to fast idle at 1500 rpm on a cold start, after 1 or 2 minutes this will quickly start dropping towards 1000 rpm and when the car is fully warmed up it idles at around 700 rpm unless you have the A/C on. You're probably just noticing it more now because of the HFC/exhaust swap.

Corona370z 07-11-2011 07:15 AM

I drive 6MT and it happens on cold mornings usually for me. It has been going on for a while and I haven't seen difference in performance or anything, except being louder in the mornings. I have Ark exhaust and Stillen intakes. I'm about to get the Berk HFCs and I'll see if it makes any more difference.

Brutal 370Z 07-11-2011 07:46 AM

yup, very normal. Happens on my G37 5AT as well. As soon as I pop it into gear it goes back down, or if you wait a minute or so.

Cafiax 07-11-2011 04:13 PM

ohh ok :D thanks for clarifying.

KusoSama 07-11-2011 05:57 PM

Quote:

Originally Posted by Corona370z (Post 1211793)
I drive 6MT and it happens on cold mornings usually for me. It has been going on for a while and I haven't seen difference in performance or anything, except being louder in the mornings. I have Ark exhaust and Stillen intakes. I'm about to get the Berk HFCs and I'll see if it makes any more difference.

I wonder how many of my neighbors I wake up when I start the beast. :)

I've noticed that for the first few minutes the car is crazy responsive too. I understand it's the cold in the engine that's doing this.

:eekdance:

kenchan 07-11-2011 06:30 PM

yah, i too kinda wonder how loud it is for my neighbors when i start mine with the fujimura muffler each weekend morning. :D it's nowhere near as loud as my old wrx with blitz catback (no silencer used).


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