While driving when I try to accelerate after 30 miles per hour my car pulsates before picking speed.The car seems like loses speed before it pickup speed.

releasing the gas pedal and it gets going again
not very safe

is the engine light on
could be any faulty sensor in this engine diagram

maf clean might help
if a spark issue needs chasing
it could be a fuel problem
maybe bad fuel or blocked fuel filter

Have an electronic evaluation carried out, it's quicker and in the long run safes you frustration and cash.

Check and see if your e brake is dragging sometimes Rust build ups create friction w drums or try changing your differential gear oil

Check for failed EGR Valve or system component

If the valve has a vacuum hose going to it ,disconnect,
plug hose & test drive to evaluate bad valve & high vacuum
signal as you suggested

I also have experienced this problem with my Isuzu D-Max pickup. Did the problem occur when you were having a long drive? Coz it happened to me when i was already driving for 1 hour at a regular fast speed. After that, the problem stilled continued, especially when i reach 100km per hour.

What I did to fix the problem was i had the pickup's alarms calibrated by an Isuzu authentic service center. Coz only Isuzu service centers can calibrate the alarms and i think they're the only ones who can diagnose the car's problem if the check engine alarm turns on.

After that, we found out that there was no problem with the engine. Just the "check engine" alarm's calibration.

Time for a rebuild of that trans

I think it may be coincidence and you have a fuel pump that has failed. Have the fuel pressure tested and replace the pump and filter as is necessary.

It sounds like one or both of the drive axle inner joints are worn out. This condition will give a very pronounced vibration on acceleration only and will be worse with increased speed.

hey
at the begging u should clarify how many gallon u used.
112 miles at 28 miles per gallon --> 4 gallons burned (112/28)
So that means we leaked 11 - 4 = 7 gallons

Now figure out how long the car was driving.
112 miles at 64 miles per hour --> 1.75 hours

So, leak was at a rate of 7 gallons in 1.75 hours
7/1.75 = 4 gallons per hour leaked.