help please!
07 is250
Disconnected the battery and reconnected after... Tried starting up my car but this weird noise occurred. Sounded like the car was gonna die.. The car kept on vibrating for some reason. Never happened before.. I don't think it has to do with how old the battery is either. The car starts up but once i step on the gas pedal, the car dies out

Any suggestions?

Thanks for your time

 

I don't think I have ever heard of that before, hopefully some one can chime in.

 

You said tried, so does that mean you didn't actually get it to run?

 

You didn't mention why you disconnected the battery, or what you did to the car while it was disconnected. It could be relevant.

 

Why did you disconnect the battery?

You may have disconnected something other then just the battery. You may want to take a good look under the hood for something disconnected. You also may want to disconnect the battery again and reconnect it.

Koz

 

i was installing new headlights lol but i found out that disconnecting battery wasnt needed.. stupid me

 

Did you fix it?

 

Did you disconnect the MAF sensor?

Javier

 

that all i could think off the MAF senser like what javylsu said..check if plugg all the way in?

 

MAF? wuts that and where is it located? lol got a pic?

 

I see it all the time at the dealer..do you have an intake or anything installed? by disconnecting the battery you reset the ECM's learned data so now it has to re-learn itself. go on a 15-20 minute drive and go throughout the rpm range. it will fix itself, just be patient

 

absolutely not the MAF (mass air flow sensor) if it was disconnected, you would get an instant check engine light as soon as you start the car.

and just for reference to the poster, the MAF is the sensor that right after the airbox on the intake tract

 

http://www.youtube.com/watch?v=k7k7XwaXzhI
http://www.youtube.com/watch?v=BLeB0UrHOTk

Watch them and you'll know where the MAF sensor is and/or what you did wrong.

 

So my question pretty much answer by you but I just not quite clear with your answer so that's why I wanna ask again.

At the beginning of the ^ video, the guy in the video said to disconnect the black wire of the battery. Is it safe for the computer to do that? I heard from my friend who is a mechanic that modern cars are more complicated and they always have to be plugged to a battery or otherwise something will go wrong, maybe check engine light will come on.

So are you sure that disconnect the battery like the video is safe?

What do you mean by "go throughout the rpm range?" Do you mean floor down the gas so RPM will shoot up to like 8k?

 

dont worry about the video....it is always safe to disconnect the negative battery terminal when the car is off. and no, modern cars do not always need a constant power source. for example,

If you disconnect the battery and reconnect it, you will not have a check engine light.

if you unplug a sensor and forget to plug it back in before starting the car, you will get a check engine light for a code having to do with an open circuit(the circuit is not complete, thus being an open circuit)

now, as long as you dont have a check engine light with the car on, drive it as you normally would and it would fix itself..floor it a couple of times (redline is not necessary) and just leave it in drive and let the ECM recalibrate.

Do you have an intake installed?