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98 volvo 70 hesitation at stops and acceleration. Drives fine. But coming to a stop it starts to feel like a quick bottoming out feeling like it wants to shut off (shaking/vibrating) like itsnot getting eenough gas. It does this on and off. It hasnt ever shut off but while idling its feels like it cuts in and out over n over. It'll just shake /vibrate. And it doesn't do it everyday. I replaced my breather system back in like sept/Oct. It was doing similar but much worse. It would give off white smoke. It ran fine after that. Now I'm not sure what it is.

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I had a 95 Volvo with similar behavior and I found out it was due to vacum leaks. I made my own automotive stethoscope to find the air vacum hizzing noise made by a broken vacum line or a air intake gasket or seal. You could by one of these stethoscope at any auto part stores
98 volvo 70 hesitation at stops and acceleration.  - a6ed673f-10dc-4c2d-9b43-899ba50dde81.jpg

Posted on Feb 13, 2014

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

SOURCE: high frequency vibration coming from the right front end at 65-70mph?

Check Four Things:

  1. Tires, Balance, and Alignment ($100)
  2. Tie Rods, Stabilizers, and Struts (known to be bad)(do the work your self) ($1,200)
  3. Rack and Pinion (know to be bad) ($1,500)
  4. Axle / CV Joints (High mileage 100,000+) ($900)
Good Luck I have done all three according to the dealerships suggestion, It solved some of it. Do it yourself buy harbor freight tools, rent some from Advanced Auto. Then buy your parts from NAPA which are better than originals it will save you $500-1,000. Or just Sell it to a scrape yard.

Posted on Oct 22, 2008

MNfisherman
  • 11896 Answers

SOURCE: 1996 Ford Explorer vibrates when idling. Also...

You have a hesitation. A hesitation is cause be either:
1. bad spark plug
2. bad spark plug wire
3. bad or leaky or plugged injector
4. timing is off
5. leaky vacuum hose

Posted on Mar 04, 2009

  • 9 Answers

SOURCE: vibration when accelerating from stopped position

3 things; U-joints, (very likely) ,engine or transmission mounts, or mud under the engine or a 4th possibility would be tires (seperated or out of balance ) good luck

Posted on May 01, 2009

  • 1071 Answers

SOURCE: Strong Vibration 1.8lt A-4 2004 multitronic

you have 1 or 2 bad ignition coils very common on this engine

Posted on Aug 20, 2009

ginko
  • 19396 Answers

SOURCE: 2006 honda odyssey, has a vibration/shaking

Hi.

It is difficult to give a precise response without seeing the car while shaking. Ihf car has automatic transmission, car shaking at 30 to 45 mph is commonly caused by a late shifting transmission, in some case wheel problems, or an engine problem (less commonly) can cause the same problem.

As said, common reasons for vibration that takes place only at a determined speed include transmission related problems, drive train and wheels related problems and engine related problems.

1 Automatic transmission related problems:
If the auto tranny is shifting too early, then the car will shake. In that case an experienced driver should be able to tell that the car is hesitating because the wrong gear kicked in. This kind of problem is commonly caused by a defective TPS(throttle position sensor). TPS is most common failure causing early or wrong shifting in a determined gear (5th if that happens at 45mph).There are less common transmissions related problems that can cause the same.The mechanic can easily test the TPS using a voltmeter while accelerating on the lift, and eventually replace the part.

Traction and wheels problems:
A mechanic driving the car can feel if problem is caused by wheel. Regarding tires, balancing problems can sometimes give more shaking at particular speed. Even if you think this is not the problem (and probably is not), tyre balancing and alignment is an inexpensive operation that should be done when you get this kind of problem.
In the driveshaft, if the u-joint is worn, loose you get shaking, when problem is starting you may feel the problem only at a determined speed. If the The U-joint may also bind up when you accelerate. The driveshaft can be checked moving the sections of the shaft by hand and checking if it loose or if there is binding. The center support bearing must also be checked.

Engine related problems.
If the problem starts at 45 mph you can exclude failures like a broken engine mount, however, an injector failing or a misfire that takes place only at determined rpm may cause the problem.
Most engine problems leave behind a fault code stored in the PCM even if the CEL does not come on. Better doing a code scan as first thing. Other tests can only be done in the garage, this include connecting machine to injector and fuel pumpt to draw the waveform of pulses sent at different speeds.

I think that I have shared what I could about the possible problems causing the shaking at 45 mph, while in acceleration. If possible try to understand if problem is given by an auto transmission engaging a too high gear, or by engine missing at that particular speed. Do the tires, just in case.

If you repute my solution helpful, please do not forget to accept. Providing good support requires time and skills, and your rating is important for us.

Best regards.

Ginko.

Posted on Oct 02, 2010

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