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Old 06-19-2015, 09:48 PM   #1
Brando103
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Default HELP!! Pulled Neg cable and now i have issues!!

Hey guys.. so I was messing around with my 2004 Rs that I just got.. it previously had a Check engine light on ( Previous owner said it was from the O2 sensor, he molestered the cat ) so I figured I would disconnect the neg. cable from the battery and let it sit while I did some work around the garage. Well after I reconnected it the CEL shut off and I thought I was all good (wanted to see if the reset would clear it and it would come back cause who knows if that kid knew what he was talkin about) well I backed it out of the drive way and now it sputters REAL BAD and the CEL is blinking at me.. Smells of gas. I drove it all of 20 feet and said.. uhhh nope!



Anyone know whats up? Is the ECU trying to re-learn or did I just **** something up. Cant say I have ever heard of disconnecting the battery cable messing anything up.
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Old 06-20-2015, 12:50 AM   #2
Uncle Scotty
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disconnect the battery again

reconnect it and get in the car AND DO NOT TOUCH THE GAS PEDAL AT ALL and turn the key to 'ON'...the last 'click' before the starter engages

AND WAIT!!! 10 seconds

DO NOT TOUCH THE GAS PEDAL AT ALL

turn the key and let the car start and DO NOT TOUCH THE GAS PEDAL AT ALL
***********
let it warm up...DO NOT TOUCH THE GAS PEDAL AT ALL
***********
turn the car off, take the key out, wait 10 seconds, put the key back in and start the car and see what happens

if you touch the gas pedal at all in any of this you MAY cause problems
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Old 06-20-2015, 01:43 AM   #3
Back Road Runner
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2004 Forester STI
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There's not much that goes wrong with the old MAP based engines. The only thing that affects how they run is the front O2 sensor, aka air/fuel sensor. When that gets caked with carbon build up, the car starts to run crappy and it slowly gets worse until the car is barely drivable unless you force it to stay in open loop (which is only warm up mode and heavy throttle).

I'd check the code just to see what it is, but generally the only major point is the air/fuel sensor.
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Old 06-20-2015, 10:03 AM   #4
Brando103
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ok guys ill try this today! and post up my results! Uncle scotty the steps you listed what do they do?
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Old 06-20-2015, 11:11 AM   #5
Brando103
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Here we go! Fingers crossed lol
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Old 06-20-2015, 11:25 AM   #6
TwistedAxles101
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Just so you know- when you have a blinking CEL, it means you have a misfire that could potentially destroy your cat (if you have one). Get the codes read.
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Old 06-20-2015, 01:23 PM   #7
Brando103
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All seems to be well after following uncle Scottys steps! Thanks guys sooo much!!!!
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Old 06-20-2015, 07:07 PM   #8
Uncle Scotty
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Quote:
Originally Posted by Brando103 View Post
All seems to be well after following uncle Scottys steps! Thanks guys sooo much!!!!
too bloody marvelous
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