Big problem

[redline_power]

The car took a dump. In first gear when it got up top it just like lost all boost and the check engine light came on. Now their sounds like a bad knocking in the engine when it just idles. But when u roll into the throttel it still pulls. About to go nuts.

[crazybrew609]

idk.. mabey a cat?

[Sp00ner]

How hard do you beat on it? Could be alot of things...

[CuriousGeorge]

hate to say it, but sounds like something might have let go. see if you cant locate the knocking sound.

[TXRLU]

Did it go into reduced power mode?

[redline_power]

Yes it went into redueced power mode. I pluged the box back in and it bucks again but the knocking noise is less. And with the box out it still pulls hard like theirs nothing wrong. Its just weird when it idels it knocks. Almost like maybe the timming on something got thrown off. I hope its not a rod knocking .

[CuriousGeorge]

where does the knocking sound come from?

[Sp00ner]

Originally Posted by redline_power

Yes it went into redueced power mode. I pluged the box back in and it bucks again but the knocking noise is less. And with the box out it still pulls hard like theirs nothing wrong. Its just weird when it idels it knocks. Almost like maybe the timming on something got thrown off. I hope its not a rod knocking .

The box? What box?

[DarricksZ28]

Originally Posted by Sp00ner

The box? What box?

Yea, what box?
Knocking at idle? Drives fine without the box you say? Knock on decel also? Mileage, mods, abuse record would all help to maybe cure your ails. I'd say for now, stop driving it until you can get a scan of the codes that it threw when it went into limp mode.