Um, are autos suppose to do this?!
10-30-2002, 06:02 PM
#1
Um, are autos suppose to do this?!
I have a 2k1 auto, with a Injen CAI.
I've been noticing that when I start my car in the morning, the car kind of shakes like its about to stall, the RPMs go up, down really low around 200-300, jump back up to 900-1100, then back to the normal idle 500-600.
I can duplicate this by keeping the car in "P" and revving it to around 4-5k RPM and this symptom will happen.
Anyone?
I've been noticing that when I start my car in the morning, the car kind of shakes like its about to stall, the RPMs go up, down really low around 200-300, jump back up to 900-1100, then back to the normal idle 500-600.
I can duplicate this by keeping the car in "P" and revving it to around 4-5k RPM and this symptom will happen.
Anyone?
10-30-2002, 06:28 PM
#4
Originally posted by Y2KSESteve
Mine does this on occasion, especially when its really cold outside. Wondered about it too for awhile then I remembered that my 89 max did the same thing.
Mine does this on occasion, especially when its really cold outside. Wondered about it too for awhile then I remembered that my 89 max did the same thing.
10-30-2002, 06:38 PM
#5
Originally posted by Larrio
I noticed that you have the injen cai also. I feel that it is not normal cause the car really feels like it's going to stall but I can't figure out what's wrong and it runs fine on the road.
I noticed that you have the injen cai also. I feel that it is not normal cause the car really feels like it's going to stall but I can't figure out what's wrong and it runs fine on the road.
10-30-2002, 06:49 PM
#6
Originally posted by Y2KSESteve
It runs fine after that which is why I have no problem with it. Until my car doesn't start or run right, I'm not going to worry.
It runs fine after that which is why I have no problem with it. Until my car doesn't start or run right, I'm not going to worry.
10-30-2002, 08:20 PM
#9
Originally posted by ToYLeT902
your MAF is prolly going bad.. but isnt bad enough to stall you out?
your MAF is prolly going bad.. but isnt bad enough to stall you out?
I've been reading around the org and there was some theory that the car is having trouble sucking in air through the long tubing during idle. So when your revving in Park, the engine is straining to suck in air, like through a long straw.. it takes awhile to get there.
I can't explain why it happens when it's cold though
10-31-2002, 05:48 AM
#12
Re: Um, are autos suppose to do this?!
Originally posted by Larrio
I have a 2k1 auto, with a Injen CAI.
I've been noticing that when I start my car in the morning, the car kind of shakes like its about to stall, the RPMs go up, down really low around 200-300, jump back up to 900-1100, then back to the normal idle 500-600.
I can duplicate this by keeping the car in "P" and revving it to around 4-5k RPM and this symptom will happen.
Anyone?
I have a 2k1 auto, with a Injen CAI.
I've been noticing that when I start my car in the morning, the car kind of shakes like its about to stall, the RPMs go up, down really low around 200-300, jump back up to 900-1100, then back to the normal idle 500-600.
I can duplicate this by keeping the car in "P" and revving it to around 4-5k RPM and this symptom will happen.
Anyone?
10-31-2002, 07:33 AM
#13
Senior Member
Join Date: Jan 2001
Posts: 2,378
Re: Re: Um, are autos suppose to do this?!
Originally posted by DAVEB
There's a TSB that addresses this symptom- NTB00-008B. It is VIN- specific, so your local dealer will have to verify whether or not your car is affected.
There's a TSB that addresses this symptom- NTB00-008B. It is VIN- specific, so your local dealer will have to verify whether or not your car is affected.
didn't know there was a TSB for that.
My car's been doing that for about a year now
thanks DaveB
10-31-2002, 08:19 AM
#14
Senior Member
Join Date: Sep 2002
Posts: 168
When your engine is cold (as in unused for over eight hours), and you start it, one or both of the following happen:
*Cold start solonoid/valve kicks in to richen the air:fuel ratio.
*Cold start injector/valve enriches the fuel mixture.
Nearly every car made since the 90's has one or both of these mechanisms, including the Maxima.
The fluctuation you are seeing is most likly from a combination of lower ambient temps and after market intake. The OEM intake created a cold-start air:fuel ratio that was consistent, and programmed into the ECU. This cold-start ratio does not have the ability to "learn", but it is adaptive/responsive to the RPM and temperatures.
When you introduce a different intake, it changes the outcome of any "expected" cold-start response. Therefore, cold-starting with an aftermarket intake will behave differently then an OEM intake.
I am betting this doesn't happen when the ambient temp is above 60f, because the cold start mechanisms aren't called on then.
*Cold start solonoid/valve kicks in to richen the air:fuel ratio.
*Cold start injector/valve enriches the fuel mixture.
Nearly every car made since the 90's has one or both of these mechanisms, including the Maxima.
The fluctuation you are seeing is most likly from a combination of lower ambient temps and after market intake. The OEM intake created a cold-start air:fuel ratio that was consistent, and programmed into the ECU. This cold-start ratio does not have the ability to "learn", but it is adaptive/responsive to the RPM and temperatures.
When you introduce a different intake, it changes the outcome of any "expected" cold-start response. Therefore, cold-starting with an aftermarket intake will behave differently then an OEM intake.
I am betting this doesn't happen when the ambient temp is above 60f, because the cold start mechanisms aren't called on then.
10-31-2002, 10:14 AM
#15
Re: Re: Um, are autos suppose to do this?!
Originally posted by DAVEB
There's a TSB that addresses this symptom- NTB00-008B. It is VIN- specific, so your local dealer will have to verify whether or not your car is affected.
There's a TSB that addresses this symptom- NTB00-008B. It is VIN- specific, so your local dealer will have to verify whether or not your car is affected.
10-31-2002, 01:51 PM
#16
Senior Member
Join Date: Sep 2002
Posts: 168
Larrio,
1) You should re-read my response to your post.
2) After that, start thinking of a way to convince your local shop that the TSB should be considered despite your intake mod.
3) Consider accepting that your CAI may be a part of your "cold-start problem".
Just sound advice from a mechanic, not a poser.
1) You should re-read my response to your post.
2) After that, start thinking of a way to convince your local shop that the TSB should be considered despite your intake mod.
3) Consider accepting that your CAI may be a part of your "cold-start problem".
Just sound advice from a mechanic, not a poser.
10-31-2002, 02:33 PM
#17
Originally posted by olincoles
Larrio,
1) You should re-read my response to your post.
2) After that, start thinking of a way to convince your local shop that the TSB should be considered despite your intake mod.
3) Consider accepting that your CAI may be a part of your "cold-start problem".
Just sound advice from a mechanic, not a poser.
Larrio,
1) You should re-read my response to your post.
2) After that, start thinking of a way to convince your local shop that the TSB should be considered despite your intake mod.
3) Consider accepting that your CAI may be a part of your "cold-start problem".
Just sound advice from a mechanic, not a poser.
I don't really see it as a problem until the car stalls or something else (knock, knock) Just wanted to ask to see if this was normal, I guess it is to some extent
Thread
Thread Starter
Forum
Replies
Last Post
220k+ A32
5th Generation Maxima (2000-2003)
25
10-03-2015 09:09 PM
maxima297
4th Generation Maxima (1995-1999)
4
09-30-2015 03:32 PM