Is my car dying? Shaking engine bouncy idle

[eboy0]

Hello, first time poster long time searcher.
I've had this car for a little over 4 months now, been running up to my expectations(always had high idle). Until recently all of a sudden my idle went up from 1300 to 2000(once warmed up). Also, when i first start the car the idle is rediculosly bouncy, going from anywhere 1200 to 400 almost to a stall. Once the car is warmed up, it evens out anywhere from 1100 to 2000 but stops bouncing.
Had a compression test run on all 4 cylinders... almost 210 in each.
I put in new spark plugs: Bosch PLATINUM GAP=0.032"
The old ones were covered in so much carbon it was unbelievable.

I've calculated i'm getting about 9-10 mpg out of this car, so i'm guessing cat is clogged(getting that checked out monday) also may need new o2 sensor.

Does anyone have any idea whats going on with my car? Is the engine just dying? Is something else the culprit?

No check engine light has appeared yet, though the engine does shake ALOT.

If anyone has any info, that'd be great.

 

[93_4g37]

possibly could be timig/balance shaft .....before i replaced my timingbelt&balancshaft belt and tensioners... my car was doing the same thing after i replaced all that my car started right up sounded great and no shakeing...

 

[93_4g37]

i see that you got off topic so my last post was useless

 

[eboy0]

93_4g37, no i'll definately consider that, seeing how the timing belt and some other accessories were fixed/replaced (according to a mech reciept from previous owner) I'll definately look into it.

 

[eboy0]

Was fiddling around a bit more today, got my FMIC stuff...
Noticed that 3 connectors are disconnected.

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Any idea if this can be causing my problems? Or what exactly these are?

 

[slipstream808]

No, those are hookups for diagnostic stuff. I'm not 100% sure what one is what, but:

One is for getting and RPM signal while under the hood.
One is for grounding your timing and holding it constant.
I think one is a "diagnostic ground".

Hope that helps.

 

[eboy0]

Really appreciate the help slip, and all others aswell... i read that boost leaks can cause a slight drop in MPG, and it seems that i have exhaust manifold leaks aswell(when i ran the seafoam smoke was coming from underneath, near the turbo) Anyways, got my new BOV today, along w/ my piping, so hopefully i'll see this setup actually hold boost.

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Also, new fuel/oil filters(OEM)

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