I've beening have problems with my lanos, while driving it starts to pull back and forward like something is holding it back and it's trying to get away.... , for about a mintue, then returns to normal, does it whenever it wants, and can't even turn the aircon on cause it looses power, can't remember how many times it has left me at the lights for a couple of secs without hardly any power cause of the aircon, also missing near hits with other cars, have try everything and have paid a tremendous amount to get this car in good shape, taken it to mechanic constantely but it works fine for a week or two but then it comes back again. plssssssss help as i am scared it will leave me in full traffic.....
1- car/engine/tranny type.
2- kms/miles on the car.
3- ignition system serviced kms (spark plugs, spark plug wires, coil pack).
4- fuel system serviced kms (injectors, filter, pump).
5- air filter serviced kms.
6- engine mods list if available.
7- exact discription for the problem.
8- associated charactristics for the problem (when car hot, goes over 60 mph, turning left, A/C on,etc...)
9- CEL status (on, off, blinking) and prefferably the DTC code you got after the OBD scan in case the CEL is on/blinking.
10- any recent engine service done even if it is a very routine one.
1- car/engine/tranny type.
2- kms/miles on the car.
3- ignition system serviced kms (spark plugs, spark plug wires, coil pack).
4- fuel system serviced kms (injectors, filter, pump).
5- air filter serviced kms.
6- engine mods list if available.
7- exact discription for the problem.
8- associated charactristics for the problem (when car hot, goes over 60 mph, turning left, A/C on,etc...)
9- CEL status (on, off, blinking) and prefferably the DTC code you got after the OBD scan in case the CEL is on/blinking.
10- any recent engine service done even if it is a very routine one.
MMamdouh
I talked to her on MSN about her problem and it sounds to me like a problem in the charging system. When she turns her AC on the problem worsens and acts like the car wants to die on her. She said all the normal maintenance has been performed and also took it to an electrician. The electrician said everything was fine but I am skeptical. The way she made it sound is that, anytime a large amount of power was needed for the AC or the radio the car would weaken, but if she turns all the accessories off the car runs better but not perfect. I advised her to clean the battery terminals and I also told her the grounding of the charging system may be insufficient. CEL is not on and she had it scanned anyway and there was a bad TPC switch, which was replaced. Definately seems electrical to me. Back me up here.
first i thought the engine was lacking power due to the fact that the A/C compressor litrally kills the engine but if other "electrical" equipment cause that as well then it has nothing to do with engine power.
how old is her battry anyways? if it is2.5 years old then chances are it mught be dieing... also does the engine crank well during morning starts? can she crank the engine with the headlights on? those are the regular battry tests... if they fail then she needs a battry or she got wiring issues.
is the alternator in a good condition? if it is nt charging well the battry will run out of power and will look like a bad battry.
Still I think this is going to be either:
1. Dying Battery (buy new)
2. Bad grounding (check ground points or possibly even upgrade to a hyper-grounding kit)
3. Bad alternator (buy new)
i didn't see your previous reply... no idea how did that happen.
anyways if she did start the car with all that turned on then the battry is ok... it could be a ground wire that is not well connected so some times it is working fine and some other it is not... seen that on a Hyundai before and the owner spent 2 months trying to find out what is wrong with the car.
well I had a similar problem a while ago, the car would lose power and sometimes it wouldn't start, it was just a loose connection to the negative terminal on the batterey, it seemed snug but I had to really tighten it for it to stop doing that.[/i]
delphis wrote:well I had a similar problem a while ago, the car would lose power and sometimes it wouldn't start, it was just a loose connection to the negative terminal on the batterey, it seemed snug but I had to really tighten it for it to stop doing that.[/i]
I've beening have problems with my lanos, while driving it starts to pull back and forward like something is holding it back and it's trying to get away.... 
, for about a mintue, then returns to normal, does it whenever it wants, and can't even turn the aircon on cause it looses power, can't remember how many times it has left me at the lights for a couple of secs without hardly any power cause of the aircon, also missing near hits with other cars, have try everything and have paid a tremendous amount to get this car in good shape, taken it to mechanic constantely but it works fine for a week or two but then it comes back again. plssssssss help as i am scared it will leave me in full traffic..... 
