Engine running rich

87DIB5.0

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Jun 9, 2018
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I have an 87 that has been switched to mass air. Its running rich and i cant find out why. I have pulled codes and comes back code 11 which i understand is system ok. It idles fine and runs fine. I have checked the mass air sensor, 02 sensor, TPS sensor, IAC sensor, and the coolant temp sensor and all read good. The fuel pressure regulator is set at about 38psi without the vacuum line connected. Any help will be greatly appreciated.
 
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General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
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What maf and sensor? Are they matched to you injectors? What computer being used? How old are the O2 sensors?
Oh, and are your tires inflated properly?
 

87DIB5.0

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It is a ford maf sensor that is matched to the 19lb injectors. the computer is an A9L. And the 02 sensors are probably a year old.
 

Blown88GT

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Nov 13, 1999
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It is a ford maf sensor that is matched to the 19lb injectors. the computer is an A9L. And the 02 sensors are probably a year old.
The sensor doesn't do the match, the housing does. It could be the housing is not for 19lb. If you need one, I have 2 or 3 of the 55mm matched to 19lb. You can have one for the shipping cost. Just swap to your sensor.
 
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Deleted member 215073

Are your catalytic converters still there and working?
 

87DIB5.0

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how do I determine if the housing is matched? I have no cats, bbk shorty headers to an x-pipe and dumped after Flowmaster 40series mufflers.
 
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Deleted member 215073

Pictures of the MAF sensor and housing would help. There are numbers on the sensor that may help identify it.
 

87DIB5.0

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6E18B5BB-002E-4E7B-AE00-245BBC5DA00F.jpeg
86806FAD-3E91-4AA1-8408-71FA0670289B.jpeg
 

87DIB5.0

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I’ve been reading that this is for a cobra, but the cobras come with 24lb injectors so it can’t be calibrated for my 19.
 
D

Deleted member 215073

Looks like a stock housing with the correct sensor.

O2 sensors in good shape?
 

87DIB5.0

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Jun 9, 2018
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It looks good. How can I test it? I’ve pulled it off while running and the car runs real rough so I know the computer is getting some reading from it.
 
D

Deleted member 215073

Not having cats is going to cause more fuel smell in the exhaust. You could try cleaning the MAF sensor, and the oxygen sensors may not be working very well if they're old.

Do you still have a functioning carbon canister?