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Author
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Topic: quick advice on 98 cobra **update
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exchp6400
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Member # 4803
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posted
 
 
Started up my 98' cobra on saturday and noticed white smoke coming out. About 5 min driving thereafter, my check engine light came on. code says bank 2 running lean. white smoke comes out at start up and a little bit while driving...i'm going to change my sensor tomorrow (I'm pretty sure bank 2 is driver side sensor, right?)BUT THE QUESTION IS: IS THIS WHATS CAUSING WHITE TO COME OUT??
[ September 12, 2008, 02:53 PM: Message edited by: exchp6400 ]
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87 Buick Turbo T | 90 GT | 93 Typhoon
Posts: 578 | From: Bay | Registered: Aug 2004
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SLOWSN95
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Member # 8269
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posted
not exactly sure about the smoke...maybe oil?
but if u have 1 faulty o2 then u might as well change em all so u wont have to worry about em later
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94' GT
347 Stroker
MM Suspended
2003 SB SVT Lightning
Pullied and Lowered
89'Hatch-SOLD
Posts: 2214 | From: 510/east bay | Registered: Mar 2008
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Blind
2.3L
CAFords OG
Member # 3052
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posted
bank 2 running lean is more than likely a vacuum leak, or other mechanical problem.
if you want to check that it's an o2 sensor, swap the front 2 sensors and the error code would follow the bad o2 if that was the case...
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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exchp6400
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Member # 4803
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posted
quote:
Originally posted by Blind:
bank 2 running lean is more than likely a vacuum leak, or other mechanical problem.
if you want to check that it's an o2 sensor, swap the front 2 sensors and the error code would follow the bad o2 if that was the case...
thanks, will try that today
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87 Buick Turbo T | 90 GT | 93 Typhoon
Posts: 578 | From: Bay | Registered: Aug 2004
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Cobraboy
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Member # 7826
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posted
White smoke only at startup huh? You sure it's not coming out while you are driving it too and just not noticing it?
I would monitor your coolant levels closely just to be safe.
Posts: 552 | From: California | Registered: Aug 2007
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exchp6400
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Member # 4803
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posted
quote:
Originally posted by Cobraboy:
White smoke only at startup huh? You sure it's not coming out while you are driving it too and just not noticing it?
I would monitor your coolant levels closely just to be safe.
didn't notice smoke until my bro followed me the other day while driving ![[Eek!]](eek.gif) . Coolant levels are normal though and don't see anything in the resevoir.
[ September 09, 2008, 11:24 AM: Message edited by: exchp6400 ]
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87 Buick Turbo T | 90 GT | 93 Typhoon
Posts: 578 | From: Bay | Registered: Aug 2004
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venommS
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Member # 7837
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posted
Pull your plugs and see if there is any oil on the threads. That happened on my 96 Cobra when one of the spark plug tube seals went bad. The smoke went away when I replaced the seal.
Posts: 104 | From: American Canyon | Registered: Aug 2007
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exchp6400
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Member # 4803
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posted
quote:
Originally posted by venommS:
Pull your plugs and see if there is any oil on the threads. That happened on my 96 Cobra when one of the spark plug tube seals went bad. The smoke went away when I replaced the seal.
Did the check engine light come on you what that happened?
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87 Buick Turbo T | 90 GT | 93 Typhoon
Posts: 578 | From: Bay | Registered: Aug 2004
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venommS
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Member # 7837
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can't remember ![[Confused]](confused.gif)
Posts: 104 | From: American Canyon | Registered: Aug 2007
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drop92
PITUDO
RACING 415
Member # 1323
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posted
get a scanner and scan the car, sometimes on an OBD 2 car, the ECU stores codes but doesnt trigger the CEL
Posts: 3422 | From: SF | Registered: May 2002
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exchp6400
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Member # 4803
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posted
quote:
Originally posted by venommS:
Pull your plugs and see if there is any oil on the threads. That happened on my 96 Cobra when one of the spark plug tube seals went bad. The smoke went away when I replaced the seal.
Changed out plugs, #7 was pretty messed up but problem still there. i'm gonna try replacing coil pack. I performed a comp. test and all cylinders were normal.
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87 Buick Turbo T | 90 GT | 93 Typhoon
Posts: 578 | From: Bay | Registered: Aug 2004
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Cobraboy
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Member # 7826
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posted
quote:
Originally posted by exchp6400:
quote:
Originally posted by venommS:
Pull your plugs and see if there is any oil on the threads. That happened on my 96 Cobra when one of the spark plug tube seals went bad. The smoke went away when I replaced the seal.
Changed out plugs, #7 was pretty messed up but problem still there. i'm gonna try replacing coil pack. I performed a comp. test and all cylinders were normal.
What was the gapping on them?
Posts: 552 | From: California | Registered: Aug 2007
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exchp6400
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Member # 4803
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posted
quote:
Originally posted by Cobraboy:
quote:
Originally posted by exchp6400:
quote:
Originally posted by venommS:
Pull your plugs and see if there is any oil on the threads. That happened on my 96 Cobra when one of the spark plug tube seals went bad. The smoke went away when I replaced the seal.
Changed out plugs, #7 was pretty messed up but problem still there. i'm gonna try replacing coil pack. I performed a comp. test and all cylinders were normal.
What was the gapping on them?
damn...i completely forgot to note that. Threw em away
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87 Buick Turbo T | 90 GT | 93 Typhoon
Posts: 578 | From: Bay | Registered: Aug 2004
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gtowned
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Member # 8156
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posted
bank 2 is passenger side.
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Taking terminators off the road one at a time...
Posts: 1106 | From: Sacramento | Registered: Jan 2008
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96mysticman
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Member # 8327
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my car did the same thing now it just does it at high rpms or when i shift gears actually dont know why though i changed coils and plugs still the same
[ September 10, 2008, 07:38 PM: Message edited by: 96mysticman ]
Posts: 580 | From: stockton | Registered: Apr 2008
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exchp6400
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Member # 4803
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posted
This problem isn't goin away. I'm out of ideas...gonna take it to my local mechanic.
Posts: 578 | From: Bay | Registered: Aug 2004
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exchp6400
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Member # 4803
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posted
ok here's an update...........
)compression good on all cylinders
)changed out spark plugs
)tested coils, they are fine
)***checked fuel press. seems to fall from 50 psi to 23-27 after about 10-15 min at idle. any ideas?...injector prob.?????
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87 Buick Turbo T | 90 GT | 93 Typhoon
Posts: 578 | From: Bay | Registered: Aug 2004
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96mysticman
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Member # 8327
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posted
head gasket?ima check with john aka warhorse58gt hell probably know or have an idea ![[patriot]](graemlins/patriot.gif)
Posts: 580 | From: stockton | Registered: Apr 2008
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exchp6400
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Member # 4803
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posted
quote:
Originally posted by 96mysticman:
head gasket?ima check with john aka warhorse58gt hell probably know or have an idea
i'm pretty sure its a fuel problem. I can smell it in the oil.
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87 Buick Turbo T | 90 GT | 93 Typhoon
Posts: 578 | From: Bay | Registered: Aug 2004
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Blind
2.3L
CAFords OG
Member # 3052
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posted
quote:
Originally posted by exchp6400:
quote:
Originally posted by 96mysticman:
head gasket?ima check with john aka warhorse58gt hell probably know or have an idea
i'm pretty sure its a fuel problem. I can smell it in the oil.
if you have a vacuum leak like I mentioned up above you will misfire because it is so lean and the fuel that is in there doesn't get burned up so you'll have tons of unburned fuel, causing more misfires...etc.
I recently fixed a similar issue on my 4v and it was due to the EGR gasket.
take a smoke maker or a propane torch (unlit of course) and smoke around the vacuum lines and gasket areas at idle, if you find the leak the idle will jump up or you'll see the smoke being sucked in by the vacuum.
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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