exhaust
 

hey guys whats up? havent been able to be around for awhile. ive been working on my car a little bit and i have a questions for you

Header:
i put on the pacesetter header and the y-extension pipe is really starting to piss me off. when i'm speeding up from a stop normally and when i turn to the left it sounds like it's bouncing up and down. it doesn't do it all the time though. it's kind of hard to explain. i got under my car and i had to retighted the clamps on the extension pipe but it didn't seem like it helped. also after i put the header on my gas mileage decreased a lot, to 6 miles per gallon to be in fact. i called my local performance shop and they said i needed to get an apexi fuel controller. is this true?

test pipe:
just the other day i made my own test pipe instead of buying one. isn't it going to increase the sound? it did a little bit but not a lot. it did however help out a lot. one problem with this test pipe though, when i put it on it made my "bouncing noise" occur more frequently. also when i come to a stop, my steering wheel, dash, and god knows what else shakes. what is up with this? i'm half tempted to take that darn thing out. another thing about the test pipe is that it took the nice sound of my muffler away.

any help would be appreciated

When you come to a stop, and it shakes, are you saying it is shaking at idle?? or the brakes???

I've never liked clamp together exhaust. To much 'losening' problems.
Your motor shifts sideways when you excelerate. if you have an automatic, you can have someone sit in it and give the throttle a quick punch to see if its moving to much. Maybe that's why the exhaust pipe bangs.

it shakes when i've come to a stop and holding on the brake. when i have it in park nothing shakes

first is your car auto. or 5speed. this is what happen to my bro. in law mk2. he got an intake leak so when he stop and his iddle is low and when he put in park his iddle got increase so the car didnt shake at all.... so we get the air leak fix and nothing happy now more....
this is another problem might as well.... sometime the alternater is poor didnt charge good.... when you came to stop sign or stop at red light... your taillights on... and the alternater didnt give alot of juice so your iddle is low to so thats why you can have a shake on the car for a low iddle tho... cause this is happen to my probe gt now this day.... correct me if i wrong....

So it is likely an engine misfire problem. could be an intake leak, which dilutes the fuel mixture. Not so noticeable except at idle.

Could be a spark problem. Cap, rotor, wires, plugs. Usually more noticeable under a load (accelerating or mtn uphill.

I\'d check/replace these items. They are cheap enough, and new/good ones will help keep you running better.

yeah.... u got it... check those point too... hope you come out with something..

everything is fine on my car, plugs, wires, alternator, everything. this just started to happen after i put my header on and got worse after i put in the test pipe

and yes it is an automatic

what about the bad gas mileage. before i put the header of i was getting 21mpg but right after i put on the header it dropped down to 11 and eventually got down to where it is now-5mpg. do i need to get a fuel controller or is there something else wrong

That\'s weird !! gas mileage problem. It sure appears to be something other than just doing the header. Is the 02 sensor connected properly??
It is the main sensor for mpg.