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Old 03-20-2019, 08:47 PM   #3
cheap sleeper
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Location: florida, FL
What I Drive: 2001 black zx3

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Originally Posted by Paul1958 View Post
What year?
What engine?
How many miles?
How long has been problem?
How long since last ignition service (plugs/wires/coil)?
How long since O2 sensors replaced.
How long since TB/MAF cleaned?

ST/LTFTs < +/-10 = normal

Doesnt like closed loop

Have you looked at live data to see that the O2 sensors are cycling normally in closed loop?

I should have included all that.

01 zetec zx3
Problem has been a couple of weeks now.
No codes.
Wires, coil, and plugs have ~10k and look great.
Valve cover is good and under 10k since replaced.
Pcv, air filer, vacuum lines, ff, pcv hoses all new.

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