4.6L (1996-2004 Modular) MustangTechnical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within. Sponsored by Cruizin Concepts
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I used to always throw 1131 and 1151 codes until i got my tune from bama because of my longtubes, this past week i put my new trans in from hanlon motorsports and my front suspension (switch to upr)...today i threw 0133 and 0153, o2 slow response, i had the battery disconnected for 4 days while doing this work to it, today i unplugged the o2s and cleaned them off and plugged them back in...tonight i threw 0153, what is going on here, no wires are crimped or exposed sensors are less than a year old. the only different thing i have done is put my catted midpipe back on and to remove the trans i had to remove the passenger side header which i install tight, but the 0153 is the drivers side, any input? should i load my tune again?
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2002 Mustang GT - Full intake (TB/plenum/cai), Full exhaust (LT headers/mid/catback), frpp 373s/31 spline, UPR tubular front end, stange 10 ways, upr coil overs, black interior swap, frpp alum. driveshaft, UDP, rear lower control arms, full length subframes, UPR torque boxes and more
What about exhaust leaks like 2 inches after the sensor at the collector?
I think that falls neatly into the "Exhaust leak(s) near the O2 sensor..." category.
would having a tune for LT headers and o/r mid cause this to happen when putting a catted mid on?
It could, however the exhaust leak needs to be fixed first.
The exhaust flow is not one homogeneous stream, but rather a series of pulses created by each exhaust event. These pulses have a head, body, and tail; each with different characteristic, with their pressure relative to the outside world being the most significant.
The head is at a pressure higher than ambient, when it passes the "leak" the gas flows out into the world; but the chemical composition of the gas in the pipe remains unchanged;
The body is at or close to ambient pressure. When it passes the leak nothing happens as it and the ambient pressure are nearly the same--the chemical make-up of the gas in the pipe remains unchanged;
The tail is at less than ambient pressure (nearly a complete vacuum), and when it passes by the leak it sucks in ambient air--changing the exhaust gas chemical composition and making it appear "leaner" to the O2 sensor;
This is why the leak makes the PCM believe the mix is lean, a big or close enough leak can cause the sensor response to slow or even appear "stuck".
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