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93 dx + 92 lx
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328 Posts
Discussion Starter · #1 ·
After googling the initial condition, many newer cars simply cut pulse width to zero on quick deceleration in gear.

Hell even the 97 crown vic does it.

My wideband is exhibiting similar oddities, but im not sure if my obd1 ecu does that.

It FLIES off the scale, but then returns to a high 14 or low 15 if i add the tiniest bit of throttle.

Is this indicative of the kind of false lean I can expect from an upstream gasket failure causing a slightly noticeable tick under load from the leak? Is this normal behavior because of a decel fuel cut? Or do I have a sensor/ ground offset issue?

It's hit 13:1 or lower on initial acceleration, but stays near 14 as the revs rise, even full throttle, second gear, flat surface. Cruising afrs are steady and smooth so I dunno if the tic is the culprit, the only other problem I had w a leak in the past gave me inconsistent cruise and idle afrs.
 
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B-series Destroyer
4g 4d civic
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913 Posts
After googling the initial condition, many newer cars simply cut pulse width to zero on quick deceleration in gear.

Hell even the 97 crown vic does it.

My wideband is exhibiting similar oddities, but im not sure if my obd1 ecu does that.

It FLIES off the scale, but then returns to a high 14 or low 15 if i add the tiniest bit of throttle.

Is this indicative of the kind of false lean I can expect from an upstream gasket failure causing a slightly noticeable tick under load from the leak? Is this normal behavior because of a decel fuel cut? Or do I have a sensor/ ground offset issue?

It's hit 13:1 or lower on initial acceleration, but stays near 14 as the revs rise, even full throttle, second gear, flat surface. Cruising afrs are steady and smooth so I dunno if the tic is the culprit, the only other problem I had w a leak in the past gave me inconsistent cruise and idle afrs.
That is normal.
 

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Registered
93 dx + 92 lx
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328 Posts
Discussion Starter · #4 ·
BD that is exactly what is indicated, thanks guys
 

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Brokedick Millionaire
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40,661 Posts
Autometer A/F Idiot gauge will tell you.....so will the FSM.
 
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