I have a 1993 Volvo I purchased new almost 17

My 1993 chevy 1500 kept doing the same thing. Everyone kept telling me different answers. First i did a nice tune up (replace spark plugs and spark plug wires). This helped a little bit but didnt solve it completely. I went to my local garage and he put on a new module unit and distributor. I have never had the problem sense then and that was 2 years ago. I sold it 6 months ago to my neighbor and it is still running strong. I hope this helps, i know how annoying that was, and embarrassing, especially when going through town.

hi, i know a shop, they supply the good qaulity and good aftersales volvo adapter for obdi or obdii. you can look here, hope help you.

you can purchase adapters or kit to check with your gauges as far as the location when you purchase the kit or adapters at the part store they can sow you where

Sounds like a faulty injector, had the same problem about 2 years ago cost over £1500 to have new injectors fitted.

It might be worth trying some redex or similar cleaning product incase its just blocked.

check to make sure the horns have good and clean grounds

You don't give any details about the vibration, you know what "strange" means but the rest of us have to make a guess.

The most likely cause is that the wheels are out of balance. This can happen if you've recently struck a kerb or pothole, if an existing balance weight has fallen off, if you have recently removed a wheel and refitted it, or if you've had a tyre repaired or replaced without having the wheel rebalanced afterwards.

There are many other potential causes, but getting the wheel balancing checked and adjusted is the cheapest and easiest thing to start with. Get the balancing checked and then report back if the problem is not resolved.

Please don't forget to rate my answer.

This is most probaly a sticky trottle control whitch need to be replaced and then updated with new software.
Dealers are aware of this trouble, but most offen denies the fact if you ask.
Costs--- 200euro, three years ago!
Volvo owner in Sweden

is the unit for tha modle year ? is it a universal or oem replacement? the shop you got it at should have the matching lines, how ever if time is agance you try a hose building centre they may be able to provide an adaptor to match your hose

Turned out that my old mechanic was right...it was one of the two relays up front.

Happened to me after first purchasing my 850 - check the fuse for the CLS, as mine (for some reason) was too narrow, and was jostling about. Once I changed it out for a new fuse, no problems at all (I performed this fix a year ago, and no problems since).