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Running rich!

 
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Old 12-04-2012, 07:55 PM
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Running rich!

1994 prelude si h22a1 vtec swap ive had the car about a year now and since day one its been running rich pretty much any throttle use while driving cause it to smoke black. havent actually ridden behind my own car but ive been told. also within a week of driving my bumper's all sooted up. NEED HELP! "related" parts recently replaced. air filter, plugs, wires,dist. cap,rotor. i think thats it. those parts werent replaced to solve it running rich. just maintenance. the only way that i see that im not getting enough air is possible incorrect valve lash...needa run the overhead. but if that doesnt solve it then its definitely too much fuel. jw if anyone knows what could be causing it? maybe a common failure with a non intrusive diag... just lazy when i can be =)
are injectors a common failure? and if so how to go about checking them. OH and no fault codes except 22. vtec solenoid. (see previous thread)
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Old 12-04-2012, 08:07 PM
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Re: Running rich!

Bad O2 sensors are a common problem which makes the engine run rich.
Altho that usually throws a CEL


Orrrrr...... are there any aftermarket fuel parts? FPR, rail, injectors, lines, filter, pump?....
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Old 12-04-2012, 08:31 PM
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Re: Running rich!

no aftermarket parts tht im aware of. how should i check sensor?
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Old 12-05-2012, 02:56 AM
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Re: Running rich!

an injector(s) could be stuck open?
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Old 12-05-2012, 03:40 AM
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Re: Running rich!

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Originally Posted by stevieG View Post
no aftermarket parts tht im aware of. how should i check sensor?
Visually inspect to see if wires are damaged and if the O2 sensor looks really old it might be done but to really check it you can check with a voltmeter.
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Old 12-06-2012, 12:28 AM
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Re: Running rich!

preciate it guys. i used my friends reader to monitor voltage. it went up to 1.6v problem is it wasnt at oper. temp the spec i have is

Sensor voltage at operating temperature
At 3000 RPM
0.5 Volts

During deceleration from 3000 RPM

Below 0.5 Volts


should it ever go up to 1.6?
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