Volvo S70 misfire problems

Filed Mar 27, 2020 · Acceleration, Engine · 170,000 miles · NE

Ignition coil is misfiring, and park neutral position switch also known as the transmission position switch or neutral safety switch is having issues. When its idling its really rough while driving the car jolts an hiccups. Doesn't know what gear it's going into

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 Apr 24, 2006 · Acceleration, Electrical · 115,000 miles · FL

Car began to lose acceleration on 10-15-05 and would take a full 2 min to reach 55 MPH with only minimal throttle depression (any more than only the least would cause the drive train to jerk and refuse to propel the car at all). If the car was pulled over and restarted the problem would correct itself for a while (sometimes the gap in between malfunctions would be several hours initially) but would always return. Ran trouble codes and the oxygen sensor was initially faulty. Replaced then the engine would idle erratically upon startup, but after a period of time (5-15 minutes) it would all of a sudden correct itself - racing the engine seemed to shorten the time period, but you would have to depress and quickly release the gas pedal in order to get the RPM's significantly high enough to facilitate the smooth operation. Once the engine ran fine, it would operate well as long as the car was never shut off (it was ran on a journey of 1,000 miles and operated perfectly normal). The moment it was shut down, even for the briefest of spans, it would act in the same manner with the idle fluctuating wildly, but seemed to be prone to stalling when the engine was warm/hot. Volvo was contacted and recommended dealer diagnosis to determine the scope of the problem. When the car was brought in for service, I was assured that it "could not possibly be the computer(etm)". However there was a software update installed (hmmmmm.....couldn't possibly, but lets adjust it....hmmmmmm ) which corrected the rough idle initially. Only problem is now the car will not reach or exceed 4,000 RPM even with the car in park (not under load) and will stall jerk and refuse to accelerate under hard pedal pressure and will not drive above about 70 MPH on the highway without protestation, loss of acceleration or jerking. All of the diagnostic trouble codes still indicate that the cylinders are wilding misfiring and I'm getting sick of trying to fix volvo's engineering problem.

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

Rough idle ets light came on car died replaced etm.

Filed Aug 5, 2005 · Electrical · 66,051 miles · IN

I own a 2000 volvo s70. I experienced the failure of the electronic throttle module several times this year, 2005. The car would often run rough and attempt to stall while driving. On one trip from new albany, in, to cleveland, oh, it happened so often that I had to leave the car in cincinnati and rent a car from enterprise car rental in order to get to cleveland. That rental cost me $236.04. I tried to have the problem diagnosed at several garages in southern indiana, but to no avail. Finally, I took the car to volvo of louisville, kentucky, on july 7, 2005. They diagnosed the problem as a faulty electronic throttle module and replaced the entire throttle body system at a cost of $803.73. What prompted my filing this complaint was an article that appeared in the louisville courier-journal on august 2, 2005. It was written by associated press reporter ken thomas. It indicated that there had been 136 complaints regarding the electronic throttle module. One of the models mentioned was the 2000 s70 sedan, which I own.

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 Jun 21, 2005 · Engine · AL

2000 s70 - multiple repairs and multiple recurring incidents of this same problem! Check engine light comes on, engine runs rough, tach bounces and power deminishes becoming a sever hazard in high speed traffic. Dealer found the problem to be "known issues" with the electronic air mass and throttle systems. Replaced twice while under warranty, extended warranty denied, shortly out of warranty and problem returns again. Dealership nor volvo will take any corrective action on >$1000 repair (which according to the service tech is almost guaranteed to return). This is my third volvo, and certainly my last.

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