1994 TA

iTrader: (1)

I changed my intake gasket and the car will not idle unless you hold it at about 1500 rpms and then it is horrible. Also the cat is smoking horribly!! Could my cat be completely clogged? It is the original with 138,000 miles? Could this be the reason my intake started leaking, it is surging, it is bucking and missing at low end? I removed my egr and it is worse ( I think because I removed the exhaust tube)?? Any Ideas?????

blown94

iTrader: (1)

More info? lets start from the beginning. Youll likely have better luck and input @ camaroz28.com

1994 TA

iTrader: (1)

It is a 1994 Formula M6. It was pouring oil out the back, missing, surging and bucking like a bronk. No Mods, just a late 94 LT1. After changing the gasket and verifing all vacuum, it will not run at idle and sounds like crap. After running it to warm it up the cat is smoking horribly so I shut it down and took temps. Front of cat was 300, center 700 and rear 400.

95z28onjuice

iTrader: (-2)

youi may have an intake gasket leak from improper install, and oil could be getting into the intake or exhaust and causing the smoke. you need to start from the begining and go from there, nmake sure everything is plugged in and routed correctly. if you think its the cat then pull the pipe and run the car. i would think its more of improped gasket install more than anything else myself i have seen it a ton of time at the dealer.

z_speedfreak

iTrader: (3)

hows your vacuum? if its good or you can't check it disconnect your exhaust before the cat and see how it runs then. let us know what you find!

Badazz 97 TA

iTrader: (18)

Do you have everything plugged in correctly?

1994 TA

iTrader: (1)

Cat was plugged, now it will idle but it still surges, low miss and bucks??????

JAKEJR

You need to check for a intake manifold vacuum leak. Guys like using different methods to do that, like an UNLIT propane torch, spray carb cleaner, smoke, etc.

I simply use water from my garden hose. Where ever the water gets sucked in the engine will change in how it's running and you may even see white smoke (steam) coming out of the muffler.

Jake

1994 TA

iTrader: (1)

It surged before the intake gasket swap.

1994 TA

iTrader: (1)

I am getting code 16 Low Resolutio Pulse Code!!!

Opti?????????

blown94

iTrader: (1)

Thats a fatal code. You have an opti going bad, or the wiring to it. Check the connector on the manifold, its an extension down to the opti and is a known problem child. Make sure you're completely plugged in down at the opti. Try some electromotive cleaner from autozone on the connections.

ORedRoc4

iTrader: (15)

All this sounds like you have installed it wrong, (no worries, I did the exact same thing the first time i replaced an LT1 IM gasket) It sounds like you didnt put enough silcone/sealant on the back portion of the block where the intake manifold meets, most likely the driver side. if there are leaks, then youll get crap idle and oil spewing out the back onto the exhaust....

Also since you took the EGR, did you plug the EGR ports at the exhaust and intake?

1994 TA

iTrader: (1)

The oil leak is gone. Now down to the opti!! Win a Win a Chicken Dinner!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!! I love these cars!!!!!!!!

1994 TA

iTrader: (1)

OK,

Changed harness and opti and it still surges at Idle!!! Any clue what could cause the surge at idle??? No codes now, just pain!! Much Pain!!

I am at the end of my rope and checkbook. I will be data logging it next!!

1994 TA

iTrader: (1)

Could my problem with surging, low miss and bucking be an exhaust leak before the O2????