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cataiytic converter-removed-engine runs -rich
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carman
New User
Oct 7, 2008, 10:56 AM
Post #1 of 6
(2942 views)
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cataiytic converter-removed-engine runs -rich
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i removed the converter at the exhaust manifold now engine runs rich fuel condition i adjusted fuel level did not help engine runs poor --black spark plugs-high fuel consumption--this is the 3rd time i have used carjunky for this problem--i can find your diagnoses--1991-mazda-b2200--200000mi new rebuilt engine TKS-AGAIN
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Oct 7, 2008, 2:40 PM
Post #2 of 6
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Re: cataiytic converter-removed-engine runs -rich
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Is this to suggest it wasn't running rich till converter was removed? Why did you remove it anyway and what's in its place?
T
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dmac0923
Enthusiast
Oct 8, 2008, 11:35 AM
Post #3 of 6
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Re: cataiytic converter-removed-engine runs -rich
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i find this a little odd.. because basically what a converter does is heat up and burn off any excess unburnt fuel in the exhaust. and the 02 sensor at the rear of the converter reads the oxygen levels in the exhaust and tells the computer wether the car is running to rich or too lean.
now if the converter was removed i would think the 02 sensor would be detecting an extremely rich exhaust flow and tell the computer to lean out the air/fuel mixture thus giving you a constant lean condition.
inorder to help that situation they sell anti-foulers (pretty much a just a Spacer) for the 02 sensor. What they do is remove the tip of the sensor up out of the direct exhaust flow and up into the spacer thus in basic terms giving the sensor a false reading.
__________________________________________________
2015 Jeep Grand Cherokee
2002 Ford Ranger
2004 Toyota Corolla
1969 Ford Mustang Mach 1
(This post was edited by dmac0923 on Oct 8, 2008, 11:39 AM)
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way2old
Veteran
/ Moderator
Oct 8, 2008, 3:20 PM
Post #4 of 6
(2920 views)
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Re: cataiytic converter-removed-engine runs -rich
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Being a 1991 Mazda pickup, I think there was only one O2 sensor.
Being way2old is why I need help from younger minds
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HYdrogen_on_Demand
User
Oct 9, 2008, 4:13 PM
Post #5 of 6
(2913 views)
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Re: cataiytic converter-removed-engine runs -rich
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If you also removed the O2 sensor with the cat...well then your ECU isn't getting any signal and is dumping gas wholesale into your carb !!
If you don't want the cat but still want to lean out the gas and save in fuel and polution reduction go to
link removed by mod. not relevent to question
for more info on how to do that. There you will find out how to reduce your emmissions, clean up those soft carbon deposits, and save dramatically on your gas bill too.
Good Luck 
(This post was edited by way2old on Oct 9, 2008, 4:17 PM)
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Guest
Anonymous Poster
pete.bruce@bigpond.com
Oct 19, 2008, 7:24 PM
Post #6 of 6
(2888 views)
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Re: cataiytic converter-removed-engine runs -rich
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Make sure your engine isn't running to cold. you may warp the head
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