Black smoke and engine codes

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Jul 28, 2004 | 10:13 PM

#16

Wakeboarder141

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From: Medford, OR

Got the FPR all put in tonight. The allen wrench made it much easier. Now the fuel pressure is down to 35 when idle and jumps to about 40 when I hit the gas which sounds about normal. I still am seeing black smoke when I hit the gas. Does that just take time to clear up or could something else be causing it? I will see tomorrow when I drive to work if the check engine light still comes on or not. Thanks for your help.

Jul 28, 2004 | 10:15 PM

#17

1972 custom

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did you undo the battery for 30 second's ? to clear the code's out of ecm?

Jul 28, 2004 | 10:16 PM

#18

Wakeboarder141

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From: Medford, OR

The battery was disconnected the whole time I was installing the new FPR

Jul 28, 2004 | 10:17 PM

#19

1972 custom

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ok does it run smooth? or ruff like the map sensor is bad?

Jul 28, 2004 | 10:18 PM

#20

Wakeboarder141

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From: Medford, OR

I have only listened to it run for a bit, but it sounds good so far. It has always ran pretty well except for the black smoke and smelling like gas recently.

Jul 29, 2004 | 07:30 AM

#21

jcald6965

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if runs smooth and it only smokes when you give it gas then it can be the residue in the cat and muffler.

Jul 29, 2004 | 08:45 AM

#22

Wakeboarder141

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From: Medford, OR

So that should stop once all the residue is burned off? How long do you think that could take? Thanks.

Jul 29, 2004 | 09:26 AM

#23

Kemicalburns

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From: Bend,OR

yes it should stop, might check a plug or two to see how things are burning. if they look real dark might change them out for new ones. you might also change out your o2 sensor as well because im sure it probably looks like whats coming out of your tailpipe.

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Jul 29, 2004 | 11:23 AM

#24

Wakeboarder141

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From: Medford, OR

After driving around all morning things seem to be good. Fuel pressure is where it should be. Black smoke seems to be gone so far. The CEL flashed on once, but didn't stay on so I am going to pull the codes tonight and see what it is complaining about now.

Jul 30, 2004 | 09:18 AM

#25

Wakeboarder141

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From: Medford, OR

Checked the codes today and it is still throwing a 173:HEGO (HO2S) Sensor Fault/Rich KOER code. I'm sure the O2 sensor is covered in gunk from running so rich so could that be causing the problem or would that be a different code? I have heard it could also be the MAP sensor. What would be the easiest way to diagnose this? Thanks.

Jul 30, 2004 | 09:26 AM

#26

Kemicalburns

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From: Bend,OR

well i would at least take the o2 sensor off and look at it. if its black go ahead and change it out. then go from there

Jul 30, 2004 | 09:46 AM

#27

Wakeboarder141

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From: Medford, OR

I pulled the O2 sensor and it is completely black and covered in soot. I take it that is bad? Can it be cleaned or should I just buy a new one?

Jul 30, 2004 | 09:49 AM

#28

gasman6674

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From: Greenwood In. USA

You can try, but I would replace it. Dont forget to reset the codes after replacement

Aug 4, 2004 | 10:07 AM

#29

Wakeboarder141

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From: Medford, OR

After replacing the O2 sensor, the 173 code is gone. Now the only code I'm throwing is a KOER 311:Thermactor Air System/fault during engine run self-test. Is that somehow related or is that something different entirely? Thanks.