Car jerks when it's almost hot, HELP PLZ!

[harp00n]

At the morning, when I start my car, it moves good for the first few minutes. But then, when the car is almost at the normal temperature (the pointer in the water temperature gauge is almost at usual place) the car starts to jerk like the fuel is running out for one minute and it feels stronger in low rpm's. And after then (a minute or two) the car moves good.

The sparking plugs are new, injector is clean (cleaned it hoping it would help, but...).

The air filters are rather dusty, but can it be because of them?...

[harp00n]

BTW, my friend has EX35 and he has the same problem. We both live in Ukraine and the fuel is rather dirty and has a bad quality here...

[audtatious]

I assume you still have a vehicle warranty there? If so, simply take it in and have them look at it. I would think if it was simply a poor gas problem it would happen all the time unless you have water in the system due to gas quality. If that's the case you should be able to get something to get the water out of the system.

[pfarmer]

At the morning, when I start my car, it moves good for the first few minutes. But then, when the car is almost at the normal temperature (the pointer in the water temperature gauge is almost at usual place) the car starts to jerk like the fuel is running out for one minute and it feels stronger in low rpm's. And after then (a minute or two) the car moves good.

The sparking plugs are new, injector is clean (cleaned it hoping it would help, but...).

The air filters are rather dusty, but can it be because of them?...

It would not hurt to change your air filters if dirty.

I am not sure if you have a fuel filter, but you most likely do have a fuel screen. this may need to be cleaned. If your friend and you buy from the same fuel station then you may consider dumping your tanks if both of you are having the same problem. It sounds like contamination from water but then it is hard to say when we are not there with you.

Perry

[harp00n]

Car has a warranty in the USA, but not in the Ukraine

I can change the fuel filter only with the fuel motor (they are in the same solid box), though I'll do it only if I won't find any other less expensive reason!

[pfarmer]

Car has a warranty in the USA, but not in the Ukraine

I can change the fuel filter only with the fuel motor (they are in the same solid box), though I'll do it only if I won't find any other less expensive reason!

Water could easily be an issue. I had a problem similar to this with a *onda which turned out to the be the filter. The biggest problem was finding the stupid thing which was under a small trap door hidden under some sort of undercoating. Easy fix once I found it. If the pump is not located right at the tank (haven't looked into this) then it could be beneficial to install a separate filter if fuel is an ongoing problem in your area.

On older cars you could often easily access the tank via the gas gauge sensor in the trunk. Now not so easy.

Perry

[SteveTheTech]

There is a primary filter inside the tank and that is it, a secondary unit would not be prudent. These cars use plastic fuel lines that do not yield to modification easily.

Fuel quality is a huge factor in operation of these modern engines. A US spec model is programmed to run on US tier 1 premium fuel between 91 and 93 octane. I really do not know what to advise if there is no premium quality fuel available maybe running a cleaner or some sort of addative may help but be very careful when selecting something.

The best advise I can give Harp00n is check with other Japanese car owners in your region, unfortunately in short supply here, see what they do to counteract the side effects associated with dirty fuel.