Hard to explain............

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#21

03-15-2014, 11:44 AM

Don B

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Quote:

Originally Posted by aholbro1

Did the vibe present after your wife drove the car? Have you eliminated a bent wheel as the source?

Since we have full-size spares in these, maybe put the spare on and move it through each of the four positions to see if any effect?

Another very good possibility, aholbro1! Also, a tire with a separating steel belt or other internal damage can look good but cause vibration.

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#22

03-15-2014, 11:56 AM

aholbro1

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Quote:

Originally Posted by Don B

Like others I suspect your vibration is driveline-related, but a failing fuel pressure regulator could allow the pressure at the fuel rail to fluctuate and lead to uneven cylinder combustion...... I found an OE Bosch FPR for under $100, but other brands are available for as little as $40.
Don

Interesting thought, Don! That may well explain what I call a "stumble" observed a couple of times this week; Cruise-control, setpoint 70 mph, there would be a noticeable on any downslopes or anytime the control decided the throttle need be retarded a bit. Switched to manual and repeated the behavior, stumble anytime I eased off the throttle. Then the problem vanished. Could be due for a throttle body cleaning, though, as I believe I completed the last one around 85k mi, now sitting at 147k.

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