Xj cherokee replaced oxy sensors still rich! - AUSJEEPOFFROAD.COM Jeep News Australia and New Zealand

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Old 18-11-2012
Tuffeb  Tuffeb is offline
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Default Xj cherokee replaced oxy sensors still rich!

Any other solutions?

Injectors? Fuel pressure reg? Tps?

Can't think on anything els

Replaced both oxy sensors still runs rough and big patch of black carbon comes out


All spark plugs are black
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Old 18-11-2012
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Did the code test wich is really cool by the way

Got 13

Vaccum line map sensor from what I can see
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Old 18-11-2012
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Dosent do the 55 flashes at the end tho after 5 mins of waiting

Just get the 13 flashes n that's all
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No read that wrong

In getting code 12
Then 55
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Old 19-11-2012
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Map sensor can cause problems if the small rubber tube at the bottom is bad. Another thing that can cause rich running is the engines temp sensors. You can check temp sensor resistance against this chart.

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Old 19-11-2012
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Check your fuel pressure.
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Old 19-11-2012
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What should fuel pressure be at normally?
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