sub-zero temp...
sub-zero temp...
I just started to have this problem in the morning trying to start my car up. I really don't know how to explain the problem other than it resembles a cars "stalling". I would probably think its normal (stalling) if the car was manual transmission, but this is not the case. Wondering if this is a mechanical problem or is it just the weather. In new england for the past 2-3 weeks now temp. have been near/below 0 degrees, and thats just about when the problem started. So has anybody every experienced a similar problem?!?!?!?!?!?!?:help
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HeavyDuty
- Posts: 1281
- Joined: Tue Sep 23, 2003 4:51 pm
- Car: 1995 Infiniti Q45
95 Nissan 240SX S14
96 Nissan D21
06 Nissan 350Z Z33
Couple of ideas:
Dirty throttle body.IACV/AACV going bad.
On other Nissan apps, there is a cold start idle bypass valve that allows metered air to bypass the throttle body until the car warms up. My SE-R was real bad on cold start until it warmed up when this valve went bad.
Hope that helps somewhat.
Dirty throttle body.IACV/AACV going bad.
On other Nissan apps, there is a cold start idle bypass valve that allows metered air to bypass the throttle body until the car warms up. My SE-R was real bad on cold start until it warmed up when this valve went bad.
Hope that helps somewhat.
keystone wrote:It's been cold in NJ as well, but I haven't experienced your problem. By force of habit I always hit the gas pedal once before I start the car as VimyJ suggested.
No.no,no,no,no! That was the way we used to start carburated engines which would open the automatic choke. What you're doing now is squirting cold fuel into cold cylinders.
For very cold starts of 0 F and below you can depress and hold the accelerator pedal 1/3 down. Do not pump the pedal like we did in the old days! That floods a FI motor.
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Q451990
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MaxI30t - is the car just stalling when you're trying to start the car, or is it when you pull up to a stop light, etc...
VimyJ - In a TSB for "all models" released 1/2003 Infiniti actually recommends having the throttle pedal pressed 1/3 open. It also says not to turn the car off unless it's been running 2-3 minutes. I don't think the throttle position has anything to do with the initial "hit" of fuel from the injectors when it's starting. Honestly, I never press the gas pedal when starting, but I think a lot of it has to do with the cleanliness of the intake system.
Of course if the car is flooded then you'll want to press the pedal to WOT since this will signal the ECU that the car is flooded and stop the injectors from pulsing.
Heath
VimyJ - In a TSB for "all models" released 1/2003 Infiniti actually recommends having the throttle pedal pressed 1/3 open. It also says not to turn the car off unless it's been running 2-3 minutes. I don't think the throttle position has anything to do with the initial "hit" of fuel from the injectors when it's starting. Honestly, I never press the gas pedal when starting, but I think a lot of it has to do with the cleanliness of the intake system.
Of course if the car is flooded then you'll want to press the pedal to WOT since this will signal the ECU that the car is flooded and stop the injectors from pulsing.
Heath
Heath the car stalls right after I start it. The whole thing happens in a matter seconds. So inorder to start my car in the morning I have been doing what vimyl said. I would have my foot on the gas than I'll start the car. For some reason I get the feeling that the procedure hurts the engine....
John
John
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Q451990
- Moderator
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- Joined: Tue Jul 23, 2002 8:21 am
- Car: 1990 Q45 - 118K, 2022 Toyota 4 Runner, 2004 Frontier M/T - 108K, 2012 Xterra (Mom's), 2023 Rogue (Inlaws)
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- Contact:
Yeah... I'm not crazy about racing the engine while it's cold either. I wouldn't think this kind of stalling with the car in Park would be at all related to the transmission. Might be time to have the IAC valve function tested and some cleaning done to make sure everything is working properly. I don't think what you're describing is normal.
What year, mileage, etc. is your car? Might want to add that information to the "car" part of your profile.
Heath
What year, mileage, etc. is your car? Might want to add that information to the "car" part of your profile.
Heath
You definitely have something amiss. The cool thing about ECU engine managment is that if everything is performing nominally, the ECU will keep the engine running unless there is a sensor problem or signals from the ECU aren't getting through to mangement systems like the IAC for instance. It's not like the bad old days of strictly mechanical control where the engine performance could and would often be copromised by weather conditions. The ECU does some amazing management these days. From -40 to 120F modern engines just keep ticking.