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03-09-2002, 06:11 AM | #1 |
Scooby Newbie
Member#: 2743
Join Date: Oct 2000
Location: Portland, OR
Vehicle:98' RS Pearl Black |
I just changed my oil and something very strange happend!
Well i just changed my oil for the first time and used 5W-30 Valvoline synthetic blend oil. This is also the first time I used sythetic. The next day my car started hesitating. Once I shift into second gear, and the RPMs drop down to 2200, and the car all of a sudden feels like it is about to die until it reaches 3000 RPM and then the power kicks in and i take off. THis probably has nothing to do with the oil change, so then what could it be? Fuel filter, spark plugs, or my injectors?????? What is it, it feels like my car is going to die each time i shift. Or can it be my clutch? Please help. My car has 54K miles on it, and it is a MY98, thanks for your help.
Norbert
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03-09-2002, 07:42 PM | #2 |
Scooby Specialist
Member#: 2817
Join Date: Nov 2000
Location: NYC and Troy, NY
Vehicle:2001 Impreza 2.5RS BRP |
Maybe a busted O2 sensor or MAF sensor? When was the last time you did a a tune up?
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03-10-2002, 04:11 PM | #3 |
Scooby Newbie
Member#: 2743
Join Date: Oct 2000
Location: Portland, OR
Vehicle:98' RS Pearl Black |
Not to long ago, what can it be besides that??? It is getting worse. Now the car starts hesitating at the bottom of every gear. Help me. Thanks for your help
Norbert |
03-10-2002, 04:17 PM | #4 |
Techno Sapien
Moderator Member#: 449
Join Date: Oct 1999
Chapter/Region:
MWSOC
Location: Lawrence, KS
Vehicle:2019 Impreza Sport Lithium Red |
Did you fill the oil filter with oil before you installed it:
Look here http://www.geocities.com/hobiegary/hesfix.htm "It has been recognized by many that hesitation normally starts following an oil change. Why? Most authorities on this phenomenon agree that the knock sensor is reporting sounds to the ECU that come with the engine pumping up a new oil filter. When a new filter is installed, it is full of air and not oil. When the engine is started, the oil pump is pushing oil in and air out of the new filter. This creates subtle sounds that are normally not heard by the ECU. It also provides a short delay of lubrication being delivered to the rest of the engine as the air passes. This also causes the engine to be noisier than usual. " |
03-10-2002, 04:55 PM | #5 |
Scooby Specialist
Member#: 3601
Join Date: Jan 2001
Chapter/Region:
NWIC
Location: Tigard, Oregon
Vehicle:2006 WRX Wagon BRIGHT BLUE! |
Another thing to check is that the oil cap and dipstick are properly installed. If there's an air leak into the crankcase, the ECU does all sorts of weird things.
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03-11-2002, 01:33 AM | #6 |
*** Banned ***
Member#: 16200
Join Date: Mar 2002
Vehicle:OK buy Nates beans westcoastroasting.com |
Oil change
I read somewhere that overfilling the oil, even by a little, can cause big problems for this basic engine type.......
Worth a check. Just my thoughts........ |
03-11-2002, 01:39 AM | #7 |
Scooby Newbie
Member#: 5416
Join Date: Apr 2001
Location: Denali Park, AK USA
Vehicle:2002 Wrx wagon Blue |
I'd put a can of heet in it and see if that helps. If not, I'd change the fuel filter. After that, lots of possiblilites...
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03-11-2002, 08:07 PM | #8 |
Scooby Newbie
Member#: 2743
Join Date: Oct 2000
Location: Portland, OR
Vehicle:98' RS Pearl Black |
What is a can of heet? Should i jsut take it to some place and have them change the oil for me. OR should i just buy a new oil filter, or what should i do exactly. I am pretty sure it has to do with the oil change. Thanks for everyones help.
Norbert |
03-11-2002, 08:16 PM | #9 |
Techno Sapien
Moderator Member#: 449
Join Date: Oct 1999
Chapter/Region:
MWSOC
Location: Lawrence, KS
Vehicle:2019 Impreza Sport Lithium Red |
Fuel Cleaner? I use Techtron myself
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03-13-2002, 11:27 PM | #10 |
Scooby Specialist
Member#: 1197
Join Date: Apr 2000
Chapter/Region:
MWSOC
Location: Cedar Rapids, Iowa
Vehicle:2013 BMW X1 Pearl White |
sstyle
The problem you're describing sounds very similar to the knock sensor "freak out" I used to get when I did oil changes. It'll probably go away if you do an ECU reset. To keep it from happening everytime I change oil, I try to fill the new filter with as much oil as possible before installing it. Then when I'm done, I start the car and let it idle for a minute or two before touching the accelerator. Seems that the knock sensor picks up extra noise if the engine's dry, or hears the sound of air being forced out of the oil filter. Not sure what the cause is exactly, but this has been a good solution for me. Jeff |
03-14-2002, 12:09 AM | #11 |
Scooby Newbie
Member#: 2743
Join Date: Oct 2000
Location: Portland, OR
Vehicle:98' RS Pearl Black |
Wow thanks for the help, yeah i have reset my ECU and a lot of the hesitation went away, but i still feels kinda ruff at times. Thanks again,
Norbert |
03-14-2002, 12:24 AM | #12 |
Scooby Newbie
Member#: 5416
Join Date: Apr 2001
Location: Denali Park, AK USA
Vehicle:2002 Wrx wagon Blue |
"Heet" is an alcohol product to get the water and ice out of your fuel system. Costs a buck or so. I think your owner's manual even suggests it. Condensation buildup is almost inevitable, and gives symtoms similar to yours. It might just be a coincidence that the problem began right after an oil change. No CEL, I presume. Throw in a can of heet next time you gas up and see if that helps.
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03-14-2002, 07:59 AM | #13 |
Scooby Specialist
Member#: 2248
Join Date: Aug 2000
Chapter/Region:
MWSOC
Vehicle:2012 C63 2012 Silverado HD |
Don't use heet, seriously.
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03-14-2002, 06:03 PM | #14 |
Scooby Newbie
Member#: 5416
Join Date: Apr 2001
Location: Denali Park, AK USA
Vehicle:2002 Wrx wagon Blue |
Seriously, why not! I don't think I know a single person around here who doesn't. I've heard rumblings about hose degradation (don't you think they formulate for that?) but never seen anything substantiated. Do you have anything?
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