thump

When accelerating fast, there's a thump at the drivers side, under the hood.. I can feel it on my left resting food, and sometimes through the accelerator.

This recently started.

What can it be?

when i turn relatively hard, i can hear the battery knocking around.
you might check that.

when i turn relatively hard, i can hear the battery knocking around.
you might check that.
My battery is on the right side, not the left, which is where the sound is originating from.

Also, my battery is bolted down by that clamp.

It's your driver side engine mount.

It's your driver side engine mount.
How hard is this to fix?

Will I be able to drive home without my engine falling out?

How hard is this to fix?

Will I be able to drive home without my engine falling out?

You will have to lift the driver side of the engine to clear the lower mount, but it's not hard to do. And no, the engine will not fall out.

Ok, my father tested the motor mounts.

He had me shift into drive and reverse, holding brakes and hit accelerator.

He says the mounts are fine.

Any other possibility?

Ok, my father tested the motor mounts.

He had me shift into drive and reverse, holding brakes and hit accelerator.

He says the mounts are fine.

Any other possibility?

It's the mount. These have shell mounts in them, that guarantee (within reason) the engine will not move about too far, should the rubber break up or otherwise become defective. You won't see a lot of movement doing a 'brake test' with these mounts, only hard acceleration (hard enough to lurch the car forward with standard brake pedal pressure). The thump is one HUGE symptom.

Is it safe to drive till I get them replaced? (I'm gonna replace both then)

I start my new/first job Monday, and I need to make it there, and won't have the time to fix it by then.

UPDATE: I did a test while driving down the road.

Most of the time the thump would happen as soon as i press the accelerator, even before the engine starts to speed up..

This happens when I was already at speed, not from stop.

Can it still be a mount? If it is, it's very odd then.

All I know is that it's a lot easier to put new motor mounts in if you've got the front suspension out.

Ok, everything suggested was wrong.

I replaced the motor mounts, which the old ones I were told were fine.

I was driving, and all of a sudden, THUMP, and SCREEEEECH my rear tires came to a hault and stopped moving..

I would try to accelerate, engine tried, but got no where.. So I waited a couple, and I could drive it again.

Now what? I'm begining to think I should have bought that Lincoln. I start a new job tomorrow and DONT need this.

My father checked it, and thinks my driveshaft is to blame, and NOT the engine mounts at all.

So, I'm screwed. I really needed my car fixed by tomorrow, and now the wrong part and money was used. Damnit.

The similiar clank (but not same sounding) can be made when shifting from D to R.

check driveshaft and universal joint.
the rear axle might have rotated too.

actually, check the flexplate.
you will have to take off the "dust cover" and slowly rotate the engine by hand (disconnect the spark) and tighten the bolts one by one
there are three

i dont think that you are really hearing it from the front of the car.
noises are often hard to trace and vibrations tend to travel well.
when my wipers are on high, i can feel it in the gas pedal.
just an example.
id take it somewhere quick.

my flexplate was loose when i got the car and i got a knocking when i went from d to r.
it got pretty bad and i thought i broke the engine because it clanked so bad in drive when they got loose.
it sounded to me like i had dropped a piston or something.

did you have to "rock" the car at all when it finally started moving again?
did the engine stall?

yea, had to rock it.

the engine didn't stall, it gave up a good fight actually.. (like when you press accelerator and brakes..)

Ok. My fathers been testing my car all night.

Here's the verdict: Fixed U-joint.

BUT! Knocking remained. After farther inspection, the knocking is actually my engine backfiring! (which would explain people in backseat thought the sound came from behind them, but people in front seat thought the sound was up front).

My father thinks it might be crap gas I got cause it started when I got gas last weekend. Today I need to fill up again, and will be getting premium. Yes it's gonna cost me like 80 bucks here to fill up, but I must.

dnt mean to sponge of your post but i have a 94 caprice and wen i try to accelerate a lil the car wants to die or the motor will just slow down but wen i floor it it will rev up this is in park wen i throw it into drive it wont go at all it wont accelerate i replaced fuel filter trhottle position sensor maf (mass air flow) i need help!!!!! asap

dnt mean to sponge of your post but i have a 94 caprice and wen i try to accelerate a lil the car wants to die or the motor will just slow down but wen i floor it it will rev up this is in park wen i throw it into drive it wont go at all it wont accelerate i replaced fuel filter trhottle position sensor maf (mass air flow) i need help!!!!! asap

this post is too old start your own posting with your questions.