need help, loss of power and idles funky

joseda9

New Member
Let me start of by saying I'm very new to the form so my bad i did something wrong

Anyways I got a 91 integra with a JDM b16a swap just converted it to obd1
First off when I start the car the rpms shoot up to like 3k and then drops around 1.5k some times it ideals at 800 some times I have a hinting ideals between 1 and 2k but when I'm driving the cat sometimes shakes when aaccelerating and I can feel it cut in and out of power like it will pull a little then like nothing. Some ttimes I will feel it cut out at like 3k bit rpms go up but dose not pull anything like it should. Also my mpg isn't where it should be.
I think it has something to do with my cat out maybe my smashed in down pipe but will it really mess with it that bad. Any help is welcpme
 

DC Guardian

Uniqueness defines
Is it an auto or manual?

When was the last time you changed your spark plugs and wires? Bad spark could cause hesitation.

Rattling could be bad gasket somewhere or the pipe is hitting/touching a heat sheild, you will have to go under and look.

Idk about the 3k rpm stuff

Sent from my DC4
 
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