When it comes to driveability problems, know that you have something that needs to be seen to. It can cost you a lot of time as well as money, and the longer you leave the problem the worse it is going to get. It is vital that you see to it as soon as the problem arises. If you go to a mechanic store and ask the technicians what is the most difficult problem to diagnose on a vehicle and if they do not answer with noisy engines and other vibrations, squeaks and rattles, they will tell you it is driveability problems.
Compared to other car parts, driveability problems occur more often. There is a wide range of these problems. They can be anything from difficulty with transmission shifting to something as simple as starting the car. A common problem that occurs with driveability is when your vehicle hesitates when you go up to about eighty kilometers per hour. A problem like this normally seems worse when it is a hot day. Cruising steadily at a speed of approximately 80 or 90 kph will encourage the problem, but as soon as you step on the gas the car should go fine. This is a typical driveability problem.
If this has happened to your car and you take it in to be checked the sparkplugs should have been changed, the timing would have been checked, and every other routine inspection would have taken place. Then you are told that everything in your vehicle is A for away and you can hit the road again, only to be driving on a hot day again and you feel the same stumbling happening in your car. So you decide to take it to a different mechanic instead of the one that “fixed” the so called problem car parts in the first place. You tell them what is going on and also that you have taken your car in and it has recently had a service, so there shouldn’t be any further problems.
Many people think that they need to get rid of their car accessories when they take their vehicle in, but if it is a trusted dealer you are taking the vehicle to that will not be necessary. If you have problems with certain car parts, you can sometimes buy them separately and have them installed without having to go to a mechanic that will cost you extra money. So now that you have found a second mechanic to see to your problem, you take the car to them to see if they can determine the root of the problem because obviously the other mechanic couldn’t. They check everything the previous guys did and then did what they didn’t do. They monitored the car over a few days, taking it for a drive every day until they experienced the stumbling themselves. They discover that the problem stems from when the clutch is engaged in the torque of the transmission converter when you go in the range of 80kph, so the problem apparently lies in the transmission. The problem has now been diagnosed, but not solved. Now to a repair shop.
At least you know what the problem is now. Now you just have to have it repaired. No, apparently not. The mechanic at the repair shop takes the car for a test drive and he reckons that it is not the transmission but rather the engine. Now you are starting to get rather mad. After all this money spent, you still don’t have answers. So where to now? An auto technology repair centre. You get there and tell them the whole story. By now you are fuming, so they agree to sort your car out for real this time.
It is not normally the car parts that need to be seen to when one talks about driveability problems, but rather the fuel pressure. Everything in the car was re-checked for the third time; camshaft lift and timing, vacuum leaks, spark plugs and wires, cylinders, fuel injectors, you name it, everything was checked. After hundreds have been spent on all of these different mechanics, it takes one to tell you that the problem in fact was the distributor. Inside the distributor cap there was a small carbon track that had occurred from the jump of the spark plug. This is why the car would jerk and stumble when not driven fast. Problem solved, finally!
The moral of the story; do not immediately assume that your car parts are acting up and that car accessories play a part in the problem. With driveability problems you have to dig deep into the source of the problem to find where it comes from.