Dropping G-35 Coupe 6MT RPM during warm up (Your Choice)

Post by **Jacko3** » Tue Apr 22, 2008 2:13 pm

When I start my G-35 Coupe 6MT, I keep holding down the clutchpedal, while I move the gears into third and back to neutral, and then into fourth and back to meutral, and then into two and back to neutral, and then, i let the pedal off. Each time you move the stick into a gear and back to neutral with clutch pedal still depressed, the RPM falls a little. With this procedure, while the engine is stil running, the RPM quickly falls from about 1400 RPM (approximate) down to about 1000 RPM (approximate). AFter the stick is placed back in neutral, then let the clutch pedal off. This is how I get my car to warm up at idle, quickly, without stepping on the gas pedal.

Post by **Sentientbydesign** » Tue Apr 22, 2008 2:20 pm

How is this warming up your car? There's no tranny movement other than the selector fork and gears.

Post by **Jacko3** » Tue Apr 22, 2008 2:24 pm

The RPM is dropping faster than if you had to wait for the car to go through the whole emotion. I think this is more of an electric load issue that causes a drop in the RPM, eventhough the gears are not moving. I don't know how the car does this, but it does. It would also suggest that the electrical wiring of the car does produce some inefficiencies, which i suspect the grounding gears have supposedly taken care of. This is confusing. Any help from anyone would be appreciated.

Post by **Sentientbydesign** » Tue Apr 22, 2008 2:27 pm

I do know that the engine will stay at a higher idle if you're moving with the clutch in and in a gear than if you put it in neutral and are moving.

If the car is in neutral and you're moving, it will idle 300-400 RPMs lower.

Post by **Beancooker** » Tue Apr 22, 2008 2:29 pm

Sounds like your clutch is a little out of adjustment. It shouldn't drop RPM's at all.

Since you have nothing listed in your profile/avitar, what freakin year is your G, Jacko?

Post by **Jacko3** » Tue Apr 22, 2008 2:40 pm

Beanor:

It is a 2007 G-35 Coupe 6MT. The does inexplicable things that have little to do with its driveability.

Last time my gears, after changing gear oil and differential oil, made a whining/whistling sound between 3K and 4K RPM in 2nd and 3rd gear, during shifting. That noise has almost disappeared. Car drives well and shifts excellently well. Maybe it was getting used to the new oil. I don't know. used to smell buring clutch smell when it was newer, but now, that smell no longer exists. So many things to get used to.

Post by **Beancooker** » Tue Apr 22, 2008 2:45 pm

I really wonder if your clutch is just *slightly* engaged when the pedal is pushed to the floor.

You may have that checked out. Especially if you *had* a burning smell, and it's gone now.

Did you buy the car new?

Post by **rn79870** » Tue Apr 22, 2008 2:52 pm

My G has a start up idle of about 2k. I'll bet yours is the same.After 30 seconds it is down to 1200 and I put it in reverse. Then I drive slowly out of my development, and by then the temperature gauge is well on the way to warm.

Post by **Jacko3** » Tue Apr 22, 2008 3:23 pm

Beaner:

Yes, i did buy it brand new. I actually love the car because of the weird stuff it does. I will never know the full extent of the car's joy and sadness.

Post by **Jacko3** » Tue Apr 22, 2008 3:24 pm

rn79870:

That's about right!

Post by **MoonRiver** » Sat May 03, 2008 6:12 pm

After read the thread I tried it on my 07 6mt, it did the same. Wondering why I then looked at the service manual. the book said there is a switch attached to the lower part of the shifter stick, it turns on when the shifter in neutral. While it's in gear it turns off. Based on the status of the switch, I guess the ECU knows if it's in gear or not, then in turn controls the amount of gas injected accordingly. This affects the RPM, but If this is the case, it would make more sense to inject more gas when it in gear, that would pump up the RPM, but in reality it drops. It puzzles me.

Post by **telcoman** » Sun May 04, 2008 2:57 am

rn79870 wrote:My G has a start up idle of about 2k. I'll bet yours is the same.After 30 seconds it is down to 1200 and I put it in reverse. Then I drive slowly out of my development, and by then the temperature gauge is well on the way to warm.

Jacko

There is no need to warm up your G. Especially in Florida. If you lived in upstate NY in the winter at 30 below perhaps a few minutes might be prudent? Just start your vehicle, drive slow out of your developmentfor a couple of minutes. You will see the temp gauge start to move rather quickly. I never warm up my G. I just start & go! My G loves me too.

Telcoman

Post by **MoonRiver** » Sun May 04, 2008 3:19 am

Jacko, I also wonder if it has something to do with the clutch. Have you done any mod to your clutch? I shortened my clutch push rod and then adjusted it back to factory set up by rotating the rod to original mark (I think I counted the number of rotation right).

Post by **Sentientbydesign** » Mon May 05, 2008 7:04 am

MoonRiver wrote:Jacko, I also wonder if it has something to do with the clutch. Have you done any mod to your clutch? I shortened my clutch push rod and then adjusted it back to factory set up by rotating the rod to original mark (I think I counted the number of rotation right).

What does that do?

Post by **joe603** » Mon May 05, 2008 7:37 am

Always let the car warm up for at least 30 seconds, even in the middle of summer. The oil needs to circulate through to protect critical components. Really, the outside temp has little to do with with it, other than warming up the inside of the car for you when it's cold.

Post by **lucidd** » Mon May 05, 2008 7:55 am

actually,I have a 6M G... and Jacko is right, the Rpms do come down when you do the above mentioned actions.

My car is stock everything...

L

Post by **Minmey15** » Mon May 05, 2008 10:36 am

lucidd wrote:actually,I have a 6M G... and Jacko is right, the Rpms do come down when you do the above mentioned actions.

My car is stock everything...

L

My G35 6MP is all stock, and I warm it up u till the temperature gauge starts to move, then dvive slow untill it is at normal temperature.

Mine also is at 2000RPM at start up, then go down to 11200 or so in 30 seconds or minute or so, then 750 or 800 later.

Post by **C-Kwik** » Mon May 05, 2008 11:48 am

MoonRiver wrote:After read the thread I tried it on my 07 6mt, it did the same. Wondering why I then looked at the service manual. the book said there is a switch attached to the lower part of the shifter stick, it turns on when the shifter in neutral. While it's in gear it turns off. Based on the status of the switch, I guess the ECU knows if it's in gear or not, then in turn controls the amount of gas injected accordingly. This affects the RPM, but If this is the case, it would make more sense to inject more gas when it in gear, that would pump up the RPM, but in reality it drops. It puzzles me.

Actually, it would make sense for it to drop the RPM slightly when in gear. Imagine trying to creep along in a parking lot in 1st gear if the engine was trying to warm up at 2000 RPM. It would require some clutch work to keep the car rolling at a pretty slow speed.

Post by **MoonRiver** » Wed May 07, 2008 4:47 am

Sentientbydesign wrote:
What does that do?

It could end up with a sticky clutch, meaning the clutch not disengaged/ engaged completely, if the mod done incorectly.

Post by **Sentientbydesign** » Wed May 07, 2008 7:44 am

I meant, what did your mod do?

Post by **MoonRiver** » Sun May 11, 2008 12:52 pm

Sentientbydesign wrote:I meant, what did your mod do?

Shortened clutch push rod, so the clutch pedal gets closer to the floor, easer to operate. Search the forum here you will find it.

here you go

http://forums.g35club.org/zerothread?id=257828

Dropping G-35 Coupe 6MT RPM during warm up (Your Choice)

Dropping G-35 Coupe 6MT RPM during warm up (Your Choice)

Re: Dropping G-35 Coupe 6MT RPM during warm up (Jacko3)

Re: Dropping G-35 Coupe 6MT RPM during warm up (Sentientbydesign)

Re: Dropping G-35 Coupe 6MT RPM during warm up (Jacko3)

Re: Dropping G-35 Coupe 6MT RPM during warm up (Jacko3)

Re: Dropping G-35 Coupe 6MT RPM during warm up (Beanor)

Re: Dropping G-35 Coupe 6MT RPM during warm up (Jacko3)

Re: Dropping G-35 Coupe 6MT RPM during warm up (Jacko3)

Re: Dropping G-35 Coupe 6MT RPM during warm up (Beaner)

Re: Dropping G-35 Coupe 6MT RPM during warm up (rn79870)

Re: Dropping G-35 Coupe 6MT RPM during warm up (Jacko3)

Re: Dropping G-35 Coupe 6MT RPM during warm up (rn79870)

Re: Dropping G-35 Coupe 6MT RPM during warm up (Jacko3)

Re: Dropping G-35 Coupe 6MT RPM during warm up (MoonRiver)

Re: Dropping G-35 Coupe 6MT RPM during warm up (MoonRiver)

Re: Dropping G-35 Coupe 6MT RPM during warm up (lucidd)

Re: Dropping G-35 Coupe 6MT RPM during warm up (MoonRiver)

Re: Dropping G-35 Coupe 6MT RPM during warm up (Sentientbydesign)

Re: Dropping G-35 Coupe 6MT RPM during warm up (MoonRiver)

Re: Dropping G-35 Coupe 6MT RPM during warm up (Sentientbydesign)

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