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Topic: p0171 pinking (Read 395 times) |
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pedropedro
Full Member
Posts: 677
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p0171 pinking
« on: Jun 13th, 2006, 5:32pm » |
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can anyone help re my 2.3 ultima....idling is a liitle rough / hunts
also pinks when hot but not badly even with premium fuel ( disconnected batt etc to clear fuel tables didnt help ) ....codes show lean p0171..egr doesnt seem to be working ..cant feel any vacuum on pipe to valve..also shows a pending p1401 code..is that the diff amp unit...how can i be sure??
cleaned idle valve..changed plugs/leads ...changed o2 sensor..cleaned maf...shows only 1lb/min at speed of 1000 rpm is that right ?? if i disconnect engine goes lumpy so i assume uts working..any advice appreciated
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bizzay1
Full Member
1997 Cosworth Saloon
Posts: 481
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Re: p0171 pinking
« Reply #1 on: Jun 13th, 2006, 5:39pm » |
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P1401 Differential Pressure Feedback Electronic Sensor circuit High Voltage
don't know exactly what it means but someone who does will be along shortly I'm sure
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sector-9
Senior Member
No scorpio anymore
Posts: 1069
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Re: p0171 pinking
« Reply #2 on: Jun 14th, 2006, 6:10pm » |
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Differential pressure sensor is associated with EGR valve on newer petrol engines - it detects if gas is flowing through the valve or not by comparing the pressure either side of a venturi - if they're different then gas is flowing.
You can find the sensor by locating the EGR valve - there should be two small pipes connecting the EGR pipe itself to the sensor.
Darren
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