Smoking out the tail pipes

[xexitenglishx]

Ok well i just got my LT's installed and everything is good. Now i have a very questions. First the egr line that used to go the the catalitic converters is now wide open should i cap it or jsut leave it open in the engine bay, there is a decent amount of air flowing through it. Second i got everything hooked up and when i start teh car it has a real lopey idle but it still holds a consistent idle at 800 to 900 which is what it was at before. Is this a problem? Possiblely a vac line i didnt connect? Would that make it like that. Also when i start up my car its smoking out of the tail pipes with the smell of gasoline. The exhaust also comes out in spurts which i think it should be doing. I need everyones feedback here. I am at school all week and can only come home on teh weekends to fix problems.. I probably wont be able to fix the this weekends but i can try tonight if people get back to me. Thanks for all your help

 

[xexitenglishx]

also the h pipe is an off road h pipe

thanks

 

[Michael Yount]

First, the line that hooks to the cats isn't an egr (exhaust gas recirculation) line; it's an air injection line. It's there to provide excess air for the cats to do their job; if they're gone, you might as well short-belt the air pump, although it probably won't hurt anything for it to just pump air.

What did you do about your O2 sensors? Have you pulled codes yet? Pull the codes to help you with the trouble shooting. Yes, vacuum leaks will really screw up the idle and running characteristics. Did you mark all the vacuum lines before disconnecting them.

 

[xexitenglishx]

I used the same O2 sensors but with an extenders. I did not mark all of the vacum lines but it was pretty much that vac line can only go there because thats the only place it reached. I did not pull codes yet. How do i go about doing that? Also its a rough idle with smoking but if the car is driven up in the rpms it drives normal then when it gets back down to an idle it has teh same problem which makes me bleieve its a vac leak somewhere. i still have to torque down the intake mani so there make be a leak there aswell. Would that cause the same problems? Thanks

 

[xexitenglishx]

anyone else?

 

[Michael Yount]

WalMart sells code readers for about $25; AutoZone will usually pull them for free; search out a post by jrichker and check his sig for a link on how to pull them with a paper clip and a test light.

 

[xexitenglishx]

I pulled the codes today. The codes that showed up were 23 34 and 67. Any feedback to what i could do to fix these?
thanks

 

[Michael Yount]

23 is the throttle position sensor out of test range - that's a problem. Has it been replaced? Do you have a closed throttle voltage reading between green and black wires? Have you opened it up with the dvm attached to see if you get a smooth voltage climb to w.o.t. around 5V?

34 - is all egr valve/system related - either not opening, system voltages are screwed up or excessive exhaust system back pressure.

67 - it's not reading your neutral switch - so it probably wouldn't let you test with the engine running, just with the ignition on.