Running Rich
Thread Starter
Pro
Joined: Jan 2005
Posts: 579
Likes: 0
From: Denton Texas
Running Rich
95 LT1 75000 miles
Car seems to be running rich. Any ideas on where to start trouble shooting this condition?
Recent parts replaced:
Fuel Filter
Air Filter
Spark Plugs
Spark Plug Wires
PCV Valve
Various Vac. Hoses
Cleaned Throttle Body
Car seems to be running rich. Any ideas on where to start trouble shooting this condition?
Recent parts replaced:
Fuel Filter
Air Filter
Spark Plugs
Spark Plug Wires
PCV Valve
Various Vac. Hoses
Cleaned Throttle Body
Safety Car
Joined: Sep 2003
Posts: 3,599
Likes: 24
From: Orange County NY
St. Jude Donor '10-'11-'12-'13
What is telling you that the car is running rich? Were the old plugs carbon fouled? Pull one or two of the new plugs - are they fouled? Was it running rich before you replaced all those parts?
Why did you replace various vacuum hoses? A vacuum leak will make a car run rich, so definitely make sure that all of the hoses are routed properly and the connections are tight.
Did you remove the throttle body to clean it? Any codes?
(Sorry for all the questions - the more info, the better
)
Why did you replace various vacuum hoses? A vacuum leak will make a car run rich, so definitely make sure that all of the hoses are routed properly and the connections are tight.
Did you remove the throttle body to clean it? Any codes?
(Sorry for all the questions - the more info, the better
)
Thread Starter
Pro
Joined: Jan 2005
Posts: 579
Likes: 0
From: Denton Texas
I'm not a mechanic. Going by neighbors word. He seems to pretty knowledgeable.
When looking at the exhaust tips there seems to be allot of carbon built up. This is the sign I was going by. I'm I wrong? Is this a sign of a rich condition?
The plugs looked fine when I replaced them. The only thing I notice was they were gapped large than the manual called for. All the hoses were replaced because they appeared to be rotted.
When looking at the exhaust tips there seems to be allot of carbon built up. This is the sign I was going by. I'm I wrong? Is this a sign of a rich condition?
The plugs looked fine when I replaced them. The only thing I notice was they were gapped large than the manual called for. All the hoses were replaced because they appeared to be rotted.
Safety Car
Joined: Sep 2003
Posts: 3,599
Likes: 24
From: Orange County NY
St. Jude Donor '10-'11-'12-'13
Carbon build up on the exhaust tips can indicate a rich condition, but the plugs are a much better indicator of current performance. If they look fine, I would believe that the car is not currently running rich.
Le Mans Master
Joined: Dec 2004
Posts: 5,789
Likes: 8
From: Myrtle Beach SC
St. Jude Donor '05-'06
Everyone has some carbon at the tips.The best way to diagnose it would be to get a laptop and Datamaster and get a scan done and post it.It is a great diagnostic aid and will tell you more than you can imagine.
Racer
Joined: Aug 2004
Posts: 379
Likes: 170
From: Buffalo Grove IL
Originally Posted by byebyeL98
Carbon build up on the exhaust tips can indicate a rich condition, but the plugs are a much better indicator of current performance. If they look fine, I would believe that the car is not currently running rich.
Also, when you replaced the spark plugs, were all the plugs consistently colored?
Ben
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
first thing to do is see if your ECM has stored any error codes. Easy to read on a '95. You can short pin4 and pin12 on your ALDL connector and read error codes where your fuel gauge normally displays:
http://www.obd1.com/
and here's a link to desypher error codes:
http://www.troublecodes.net/GM/
http://www.obd1.com/
and here's a link to desypher error codes:
http://www.troublecodes.net/GM/
Last edited by MikeC4; Feb 26, 2006 at 06:16 PM.
Thread Starter
Pro
Joined: Jan 2005
Posts: 579
Likes: 0
From: Denton Texas
No codes - All plugs looked the same
Thanks for the info guys.
I think I'm just going to consider the car good. No codes, I don't smell any gas so, with all the info I recived today I'm happy.
Another satified customer.
Thanks for the info guys.
I think I'm just going to consider the car good. No codes, I don't smell any gas so, with all the info I recived today I'm happy.
Another satified customer.
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Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
Originally Posted by DG'sVette
No codes - All plugs looked the same
Thanks for the info guys.
I think I'm just going to consider the car good. No codes, I don't smell any gas so, with all the info I recived today I'm happy.
Another satified customer.
Thanks for the info guys.
I think I'm just going to consider the car good. No codes, I don't smell any gas so, with all the info I recived today I'm happy.
Another satified customer.
Racer
Joined: Jan 2005
Posts: 476
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From: Tucson, AZ. L98-85 AUTO COUPE: 120k MILES: daily driver. SOUND OFF IF YOU'VE BEEN THERE. Ex-Jumpin' Junky-82nd Airborne-2/505 PIR: 1st ID-1/16th Inf: Recon Marine Retread. GOD BLESS GRUNTS.
Melting Slicks
Joined: Oct 2004
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From: Austin Texas
Originally Posted by parafrog
nice URL frog....thanx for sharin'