mr.ed Posted July 15, 2009 Share Posted July 15, 2009 2009 Subaru Forester Mileage approximately 3980. Date 07-09-09 Engine miss fire and cut out on start up outside air temp average is 60 degrees/ About a month ago after returning from 200 mile trip. The next morning upon starting the engine, it started up quickly and the RPM went up to about 1800 it then cut out( engine appeared to stop firing) and the RPM dropped down to about 500-600. The engine then fired off again and it sounded like it was running on 2 cylinders. Within about 10 seconds it gradually straightened it’s self out and ran normal as a cold engine would be expected to run. Since the first occurrence engine has been doing this each time it is started when it is cold after not being run about 12 hours.. It seems to be temperature related as the condition appears to be more pronounced at colder engine temperature. The condition is sometimes a great deal worse then at other times. A friend of mine was in the car the other morning when I started it and the engine was having particularly bad day, his remark was my that is certainly a rough starting engine for a new car.. The engine has never stalled during malfunction. The engine runs very smooth when it is warm and always starts in a normal manner when warm. My gas mileage appears to be normal about 24-25 MPG. I use Mobil 87 octane fuel. Taken to the dealer who claims he cannot duplicate this problem. Suggested we wait for cooler weather!!! Link to comment Share on other sites More sharing options...
Fairtax4me Posted July 15, 2009 Share Posted July 15, 2009 Sounds like our Saabs do when the plugs get fouled. Take it to the dealer, make them keep it until they find out what it is and fix it. If they won't do it, take it to another dealer. Link to comment Share on other sites More sharing options...
nipper Posted July 15, 2009 Share Posted July 15, 2009 These things can be annoying to diagnose, and in a way the dealer is correct. This has all the symptons of a had sensor or module. Which one, iw ould guess the crank sensor or cam sensor. Do you notice any black smoke when it happens out the tail pipe? Link to comment Share on other sites More sharing options...
mr.ed Posted July 15, 2009 Author Share Posted July 15, 2009 Thanks for the reply. I did not notice any smoke. This whole occurrence lasts only about 15 seconds. It seems like my immediate action to take is to put pressure on the dealer. I will post what the corrective action when ever that happens. mr.ed Link to comment Share on other sites More sharing options...
nipper Posted July 15, 2009 Share Posted July 15, 2009 I should have said coolant temp sensor too. When its something that is dependent on climate, you really can't put pressure on him untill the weather cooperates. He cant find something that requires cool weather to fail when its warm out, as the fault will never show up. He doesnt have a drive in enviormental chamber to test in. In this case work with him, Make sure the complaint is noted someplace in documentation, and just wait till the cooler weather comes for it to act up. nipper Link to comment Share on other sites More sharing options...
mr.ed Posted July 16, 2009 Author Share Posted July 16, 2009 Thanks for the comment. I understand the temperature business. The vehicle does it every morning all the vehicle has to sit for over 12 hours or like over night. It has done this same thing for over 30 morning starts. I took it to the dealer left it over night for them to check it out. The service rep parked the car and said he it would not be moved until the next day and I suspect that did not happen. I called the next afternoon and was told they want to leave it sit for awhile longer because they had changed the plan and serviced the vehicle prior to diagnosing the problem. That was not suppose to happen. It is a mess. This AM the OAT was 60 degrees vehicle had sat for 15 hours, engine started immediately then cut out and RPM dropped to 400 the it fired on a couple cylinders, then finally straightened it self out. Link to comment Share on other sites More sharing options...
subaru101 Posted July 16, 2009 Share Posted July 16, 2009 2009 Subaru ForesterMileage approximately 3980. Date 07-09-09 Engine miss fire and cut out on start up outside air temp average is 60 degrees/ About a month ago after returning from 200 mile trip. The next morning upon starting the engine, it started up quickly and the RPM went up to about 1800 it then cut out( engine appeared to stop firing) and the RPM dropped down to about 500-600. The engine then fired off again and it sounded like it was running on 2 cylinders. Within about 10 seconds it gradually straightened it’s self out and ran normal as a cold engine would be expected to run. Since the first occurrence engine has been doing this each time it is started when it is cold after not being run about 12 hours.. It seems to be temperature related as the condition appears to be more pronounced at colder engine temperature. The condition is sometimes a great deal worse then at other times. A friend of mine was in the car the other morning when I started it and the engine was having particularly bad day, his remark was my that is certainly a rough starting engine for a new car.. The engine has never stalled during malfunction. The engine runs very smooth when it is warm and always starts in a normal manner when warm. My gas mileage appears to be normal about 24-25 MPG. I use Mobil 87 octane fuel. Taken to the dealer who claims he cannot duplicate this problem. Suggested we wait for cooler weather!!! have you looked at the O2 Sensors?are they wideband? if so, my 2001 OBW with the EJ25 had the same issue,would run, but after time it was barley driveable,i would suggest checking what kind of voltage ur O2 Sensors are putting out,it should be near 4 volts. Link to comment Share on other sites More sharing options...
nipper Posted July 16, 2009 Share Posted July 16, 2009 Yes that happens. Cars have to be moved and people just grabs keys to move them without checking. SO what you are saying is that it happened to them? Link to comment Share on other sites More sharing options...
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