Idle drops slightly at stoplight
08-09-2007, 08:40 AM
#1
Senior Member
Thread Starter
Join Date: 07-12-2006
Location: Derby, KS
Posts: 390
Idle drops slightly at stoplight
Sometimes when I come to a stoplight the RPMs will drop by about 100 RPM and the engine feels rough for 1 or 2 seconds. It recovers and idles fine after that. It has done it both with the A/C on and off. I have noticed this off and on for a few months.
Has anybody else experienced this?
Has anybody else experienced this?
08-09-2007, 08:53 AM
#2
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Join Date: 10-14-2005
Location: Rochester,N.Y.
Posts: 9,121
Not on my HHR but on my Grand Am. I had a problem in my transmission like one of the sensors went bad if I remember correctly and I just ignored it so it got worse. The car was an automatic and it got to the point where I had to shift the car into neutral or park at stoplights to keep it from stalling. 
That's when I decided to get it fixed. 
That's when I decided to get it fixed.
08-09-2007, 09:48 AM
#3
Senior Member
Join Date: 06-21-2006
Location: Calgary
Posts: 939
I've felt that before in my HHR but never considered it a problem. It does happen but I live with it. Mine done that ever since I bought it, which will be two years at the end of Sept. I have 30000 KM on mine.
08-09-2007, 09:59 AM
#4
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Join Date: 10-19-2005
Location: Miami
Posts: 20,687
Mine seems to show a similar type thing, but only noticable at night when headlights are on. The lights will appear to dim for a second but there is no reflection of power loss on the RPM gauge. Also happens w/ or w/o AC.
08-09-2007, 06:05 PM
#7
Senior Member
Thread Starter
Join Date: 07-12-2006
Location: Derby, KS
Posts: 390
I noticed it was doing it again today. This time the car was fully warmed up.
I have had the car for 7 months and 11,000 miles and I have never got above 26.8 mpg on a tank. That includes a 600 mile trip on the open Kansas Interstate. It averages about 24.5 in mixed driving (50% highway) I calculate my mpg at every fill up using a program on my computer. usually it works out slightly higher than what the DIC says. The above numbers are my calculated numbers. does this seem low for the 2.4 w auto? I am wondering if the shuddering and fuel mileage are related. I remember seeing someone say they had to have a fuel injector replaced on theirs.
Before I bought my car I rented a 06 with a 2.2 and took it to Missouri. We got almost 35 on one leg of the trip and never below 28. Judging by that it makes me wonder about my car
I have had the car for 7 months and 11,000 miles and I have never got above 26.8 mpg on a tank. That includes a 600 mile trip on the open Kansas Interstate. It averages about 24.5 in mixed driving (50% highway) I calculate my mpg at every fill up using a program on my computer. usually it works out slightly higher than what the DIC says. The above numbers are my calculated numbers. does this seem low for the 2.4 w auto? I am wondering if the shuddering and fuel mileage are related. I remember seeing someone say they had to have a fuel injector replaced on theirs.
Before I bought my car I rented a 06 with a 2.2 and took it to Missouri. We got almost 35 on one leg of the trip and never below 28. Judging by that it makes me wonder about my car
08-09-2007, 06:21 PM
#8
Member
Join Date: 08-07-2006
Location: Rochester, NY
Posts: 50
Mine has done that since new as well. I notice it mostly shortly after runnig the car at 75 on the Thruway then stopping at a traffic light a little later. I read somewhere that this is common with the ecotech motor.
08-13-2007, 07:24 AM
#10
Senior Member
Join Date: 06-29-2007
Location: NC
Posts: 165
My 2.2 does this too. Not all the time, but it does it. The first time it happened to me, I thought the engine had knocked off. I guess I'm getting used to it now.
My 2.2 gets ~30mpg back and forth to work (50% highway/stop lights) and ~35mpg or better on long trips.
I wonder if this is the norm between the 2.2 and 2.4 engines.
I wonder if this is the norm between the 2.2 and 2.4 engines.