Civic shakes when in reverse

[dethseeker90]

Hey guys after I put in headers down pipe and hiflow cat my car started shaking when I put it in reverse. This only happens when it's in reverse. The nuetral idle and driving is perfect. Only when in reverse. What could be causig this?

 

[RonJ]

Sounds like the new exhaust system is too loose, causing it to shake.

 

[CivicSiHatcher]

ya agreed check all of ur hangers and make sure they r all still attached also while ur car is cold get under it and see if u can shake ur exhaust it should be stiff if u installed it all right

 

[ej_swag]

If it's a bolt on (which it most likely is), get it all hot whether that means driving around, or just letting it run idle for a while, and then tighten the bolts even more. I found this sort of a useful piece of info if it's lose.

 

[FRODO]

Shifter bumping against new exhaust?

 

[dethseeker90]

Found the problem. Intake had slot of play out of.nowhere so it was hitting hood. Fixed tho. And I will try the whole heat up everything and tighten cause I'm noticing a squeeking sound when I let of the gas so a bolt somewhere down the exhaust is loose. Thanx for replies

 

[mxpower]

hey guys my car also have a problem with the exhaust well the cat rattles at 3000rpm what can i do to fix it? do i get a new one?

 

[1993hatch]

your cat's f**ked probably

 

[FRODO]

hey guys my car also have a problem with the exhaust well the cat rattles at 3000rpm what can i do to fix it? do i get a new one?

Physically shakes? or a rattling noise?

 

[mxpower]

rattling noise at 3000 rpm's only.

 

[FRODO]

Have you checked the bolts?

 

[mxpower]

yes but i think the noise is inside the cat.

 

[FRODO]

Not to likely but take it off and see if the "honeycomb" has broken up.

 

[mxpower]

will do this weekend, and if it is what should i do?