Rick's Free Auto Repair Advice

Car stalling rough idle Taurus Sable

Car stalling rough idle Taurus Sable

P0191, P0300-p0306, P0316, P2197, stalling, hesitation, rough idle, poor performance.

This could be caused by lots of things but the key might be the P0191 Fuel rail pressure sensor condition code. Because if the fuel rail isn’t getting enough fuel pressure, the air/fuel mixture will be lean and that will cause misfires and hesitation. It would also cause the O2 sensor to read lean.

So start with the basics like a fuel pressure and fuel volume test. Or, you can start on the electrical side by doing a voltage drop on both the power and ground connections for the fuel pump. Some shops are reporting corrosion on the fuel pump ground that reduces power and fuel pressure. If you find corrosion (or voltage drop), clean the connection with a wire brush and coat the connection with dielectric grease. Then clear the codes and test fuel pressure again. Or drive until the codes return.

For more information on this repair or any others for your vehicle, buy an online subscription to either Alldatadiy.com or eautorepair.net. Click on this link to compare the two services: Compare Alldata and Eautorepair.

If you just need information for a single repair and want to save money,eautorepair offers a lower price 1-week subscription for only $11.99. Or, if you’ll be working on this vehicle in the future, you can buy a 1-year subscription (Alldatadiy.com for $26.99, or eautorepair.net $29.99)

© 2012 Rick Muscoplat

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Posted on by Rick Muscoplat

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