Terrible Rattling sound!

[legotech7]

I have a 95 Sonoma that has this terrible rattling noise when I push the gas peddle to accelerate, and the noise subsides when it changes into gear. But every time I need to accelerate, you can hear this crazy sound, underneath like where the exhaust might be. I checked under the truck to see if anything might be loose, but everything is tight. Also the truck has like no power. The engine is a 2.2. Going up a hill, I have the pedal almost to the floor and she barely does 30 mph. Any one have any Ideas?
Thanks, legotech7.

[MT-2500]

Originally Posted by legotech7

I have a 95 Sonoma that has this terrible rattling noise when I push the gas peddle to accelerate, and the noise subsides when it changes into gear. But every time I need to accelerate, you can hear this crazy sound, underneath like where the exhaust might be. I checked under the truck to see if anything might be loose, but everything is tight. Also the truck has like no power. The engine is a 2.2. Going up a hill, I have the pedal almost to the floor and she barely does 30 mph. Any one have any Ideas?
Thanks, legotech7.

Any codes or check engine lights?

Beat on the cat and see if it is lose inside.

Run a engine vacuum check for exhaust back pressure.

Post back engine vacuum at idle and at 2K RPM.

If less at 2k than idle you have a restricted exhaust system.

[NJH_Habitatpro]

I have this same problem on my 95 4x4 vinW. Rattles while gasing then once it shifts it stops. vacuum might be a issuse due to pretty sure my brake booster is bad. Hear a hissing sound when hitting the break under my dash. But I also have the loss of power, just did a tune up on it to. so spark plugs wires and air filter are good and of course oil and oil filter.

[legotech7]

So, did you resolve the noise issue? And if so, how?

[NJH_Habitatpro]

I have not messed with mine yet i will post back if i find my problem ill be working on it wednesday.

[legotech7]

No codes, No check engine light, no unusual sound coming from the Cat.Ill try to run the engine vacuum check and see what turns up. I'm a little newbie at this, how do I go about running the vacuum check?
Thanks for all advise..............

[exalteduser]

Did you beat on the cat with like a rubber mallet? that really sounds like what it is to me is broken up pieces inside