1999 Volvo S70: misfire or rough idle

6 of the 205 complaints about the 1999 Volvo S70 describe misfire or rough idle.

owner complaints: 6
of this car's complaints: 3%
recalls: 0

Is there a fix? 10 service bulletins cover this area of the car. See below

Misfire or rough idle by model year

2000
4
1999
6

What owners say

Filed Feb 5, 2010 · Engine · 109,000 miles · IL

In mid-december the car started but ran rough and lacked power. Previous to that it ran fine; since then it has had various intermittent problems related to acceleration. Sometimes the engine runs rough and lacks power. Other times the engine runs fine but the car does not respond to accelerator input to increase speed. Sometimes the car stumbles but accelerates adequately. More often the car will accelerate to about 20 MPH and not increase speed beyond that irrespective of accelerator pedal pressure. After a few seconds the car will suddenly accelerate normally. Replacing the throttle body module corrected the problem. This part is subject to a the federal safety agency agreement with volvo that requires volvo to replace the unit free but the dealer refused to do that and charged me for the repair.

Filed Dec 28, 2006 · Fuel system · 87,000 miles · GA

Purchased used car 1 week ago. 87,000 mi. No problems, ets light came on. Yellow light, not red = not an emergency. Got home safely, no odd behavior, and read about it in manual, which said to take to dealership, very vague description. Went to start car, smelled gas, rough idling revving 1,000 rpms while parked - I wasn't even touching the pedal, blinking headlights a.k.a intermittent power. If this occurred on the road, I cannot predict what could have happened. Read same complaints online...expensive to replace etm unit, continued failure, no recall or warranty coverage. I do see a recall on 11/14/2006 but I'm unsure if this is the same problem.

Filed Sep 7, 2005 · Electrical · 50,000 miles · MN

Rough idle ets light came on car died replaced etm.

Filed Aug 3, 2005 · Electrical · 147,495 miles · ID

My 1999 volvo s70 glt was just turned into my local dealer. The electronic throttle module is the primary suspect. Rough idle, stalling, surging at idle, bursts of overly rich fuel mix at idle. Intermittent symptoms at idle. Runs ok at freeway speeds with mild surging.

Filed Aug 7, 2004 · Fuel system · MD

Volvo 1999 v70 electronic throttle control failure. Intermittently really rough idle, no power, totally unreliable transportation. This is bringing the engine management light on and eventually putting car in limp home mode. If this car ever failed in heavy, high-speed traffic, there would be a major catastrophe with possible loss of life. There are numerous instances of this failure recorded in internet chat rooms. Volvo is apparently aware of this problem, but does nothing to solve it.

Filed May 10, 1999 · Engine · OR

The enhgine will begin to run roughly (as though it is flooded) loses, power and will not accelerate. When this happens, the "ets" and "check engine" lights come on. The owner's manual says to pull over, switch off the ignition and then restart. If the