ok so i blew my motor and while its out of the truck my options seem endless. i already cut off one cat and used a thrush welded muffler and noticed some gas milage increse. my question is can i get rid of egr, smog pump and the last cat without screwing up my computer?...it is an 89 302, and i dont need emmisions where i live. i am also thinking of heders while im at it.
exuahst
- Thread starter ford_302
- Start date
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do what i did rip it all out itll run just fine if your like me and dont need emissions i took every thing off now i have straight pips with 2 cats runs damn good. like it should have been from factory. Taking that stuff off wont hurt it at all you will also get more power and gas millage
sweet thats exactly what i was looking for 
/emoticons/[email protected] 2x" width="20" height="20" /> so with my egr valve can i rip it off and plug everyting?
/emoticons/[email protected] 2x" width="20" height="20" /> so with my egr valve can i rip it off and plug everyting?ford_man_4life
New member
I'm installing a set of headers so hearing that i can rip all those pumps and stuff off is awesome. Question though, why are you guys running cats? I was just going to put a 45 degree elbow off each collector and straight pipe it to the side of the truck, will this cause issues. And yes i am welding the O2 **** into it.
madmax
Member
I've done similar things on my 91, no problems, ****, i even got rid of the pcv and went with a breather, so it occasionally puts out a tiny amount of smoke (oil fumes and blow by i assume) when it's really hot (less than a cigarette at worst, you never see it unless you look for it and the air is dead calm), big whoop, i'd rather not **** oil fumes and any blowby back into my intake (also you have to plug the hole in the intake) . computer honestly don't know the difference, and as far as the egr, two gaskets and sandwich a piece of aluminum beer can in between them, It won't **** in exhaust gasses, and the computer don't know the EGR valve is missing, neither will most mechanics at an inspection station. Also to help get passed emissions, a strategically located tiny hole in the exhaust can **** in clean air, diluting the exhaust in the pipe. CEL on and they won't pass it? pull the panel and yoink out the bulb, usually they won't bother hooking it up to the computer unless the CEL is on.
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sweet...i dont need emissions or DEQ. ive already caped off where the EGR valve use to sit...and i didnt use a beer can lol just a polised piece of alluminum... one thing i still dont understand, what the **** does the PCV valve do? any thing important to preformance?
madmax
Member
it applys a small amount of intake vaccume to the crank case, this keeps pressure from building up due to blowby and heat (hot air expands) for performance, well it only hurts it, it either sucks the blowby (combustion gasses that leaked past your piston rings) or oil fumes (from the hot oil in the pan) into your intake system
