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10-07-2003, 12:17 PM | #1 |
Scooby Specialist
Member#: 4615
Join Date: Mar 2001
Chapter/Region:
BAIC
Location: Don of the Wagon Mafia
Vehicle:05 FXT/01 OB/97 OB Yes. |
Low/rough idle?
Okie, car has ~150k on it. 97 OB, 2.5 DOHC, 4EAT.
Within the last couple days, whether the motor is warm or cold, it's been having a pretty severe vibration at idle, whether in gear or neutral/park (it's a 4EAT). It's idling at about 500-550 rpms, and it feels like there's a load on the motor when I try to rev; give it gas and it still feels like it's got load, but it's not vibrating. Based on past experience with other cars, I'm thinking spark plugs/wires/rotor/cap. Any other suggestions or ideas? It does it in and out of gear (obviously worse in gear) so I think it's a motor issue as opposed to a tranny one, and I'm thinking it's not getting clean spark 100% of the time and so is having to push dead cylinders, which is why it's feeling like it's got load on it at idle and vibrating so bad........
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10-07-2003, 12:39 PM | #2 |
Scooby Guru
Member#: 7374
Join Date: Jun 2001
Chapter/Region:
BAIC
Location: Gold Country
Vehicle:2023 MAGA Hat Model3 grey, or is it gray? |
air filter?
loose ground? Air flow sensor? Good luck! |
10-07-2003, 12:46 PM | #3 |
Scooby Specialist
Member#: 4615
Join Date: Mar 2001
Chapter/Region:
BAIC
Location: Don of the Wagon Mafia
Vehicle:05 FXT/01 OB/97 OB Yes. |
Checked grounds, including aftermarket ones. Changed filter. Need to check MAF, but it runs much worse when that's broken
I'm going to swap back to my stock airbox and see what happens. Thanks. Any other ideas? One of the Legacy guys thinks it might be the coil pack, wheeeeee : ) |
10-07-2003, 12:48 PM | #4 |
Scooby Specialist
Member#: 31789
Join Date: Jan 2003
Location: Bay Area, CA
Vehicle:Now with 100% more V8 Spec C and 6MT |
I will most certainly recommend to you, to inspect your sparking system. I had a plug wire go bad on an old car, which threw the motor into violent vibration at all times, and provided virtually no power. Inspect them wires, and come back if it isnt that.
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10-07-2003, 01:00 PM | #5 |
Scooby Specialist
Member#: 4615
Join Date: Mar 2001
Chapter/Region:
BAIC
Location: Don of the Wagon Mafia
Vehicle:05 FXT/01 OB/97 OB Yes. |
Yeah, that's what I'm swapping out tonight, plugs and wires. Thanks I'm hoping that works
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10-07-2003, 03:58 PM | #6 |
Scooby Specialist
Member#: 25399
Join Date: Sep 2002
Location: Silly Valley, CA
Vehicle:2003 Impreza WRX Black |
It probably will, unless you have sticking alternator or A/C compressor or something else bad.
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10-07-2003, 04:05 PM | #7 |
Scooby Specialist
Member#: 4615
Join Date: Mar 2001
Chapter/Region:
BAIC
Location: Don of the Wagon Mafia
Vehicle:05 FXT/01 OB/97 OB Yes. |
Yeah, alt was swapped out ~20k ago, so that's probably fine. Didn't even think about the AC compressor, and don't want to....
It does it whether the AC is on or off, too. |
10-07-2003, 09:46 PM | #8 |
Former Vendor
Member#: 17397
Join Date: Apr 2002
Chapter/Region:
BAIC
Location: Fremont, CA
Vehicle:many '02 Rex,'13 FRS WRB, White |
what about your fuel lines?
did you check the filter? do your ecu throw a CEL? SD |
10-07-2003, 11:07 PM | #9 |
Scooby Specialist
Member#: 4615
Join Date: Mar 2001
Chapter/Region:
BAIC
Location: Don of the Wagon Mafia
Vehicle:05 FXT/01 OB/97 OB Yes. |
Yeah, I'm getting fuel, it revs fine, too, it's just the idle in gear that's a real problem.
No CEL's, and an update: I'm not dropping $260 on a coil, plugs and wires to test and see if it works, I'll wait till it really breaks Thnaks for your help, guys |
10-07-2003, 11:43 PM | #10 | |
Former Vendor
Member#: 17397
Join Date: Apr 2002
Chapter/Region:
BAIC
Location: Fremont, CA
Vehicle:many '02 Rex,'13 FRS WRB, White |
Quote:
its the little things that can lead to big expensive things when not take care of right away. SD |
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10-08-2003, 12:01 AM | #11 |
Scooby Specialist
Member#: 4615
Join Date: Mar 2001
Chapter/Region:
BAIC
Location: Don of the Wagon Mafia
Vehicle:05 FXT/01 OB/97 OB Yes. |
Yeah, I know it. Unfortunately, both of those guys are a little far away
I'll probably swing it by a couple of Scoob shops tomorrow and see what I can find, as I know about what little things can do |
10-08-2003, 04:05 PM | #12 |
Scooby Newbie
Member#: 13841
Join Date: Jan 2002
Location: San Francisco
Vehicle:02 WRX WAG |
Sounds like plug wires? Check em with an ohmeter.
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10-09-2003, 12:42 AM | #13 |
Scooby Specialist
Member#: 4615
Join Date: Mar 2001
Chapter/Region:
BAIC
Location: Don of the Wagon Mafia
Vehicle:05 FXT/01 OB/97 OB Yes. |
Well, it would appear to have been the plugs. Big thanks to Joe Brazil for the help on this....
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