So i put headers on the vet last night, now it runs like $hi7, wont rev past 4k nad stumbles to get there, now i have a pcmforless chip(tuned for removal of air and egr) that should be here tomorrow along with all the egr block off plates needed ot remove the egr crap. My question is with all the egr and air stuff being removed and no block off plates could this cause the stumbling? also throwing only code 26. Mind you this it racn perfectly for the first few weeks of ownership(just bought) and would destroy the tires in first gear, it did however one night just randomly start having a low rpm stumble and a slight loss in power, i was thinking it was probably a bad plug because it did have a bad 02.

Well last night while i was there I installed brand new NGK tr55s gapped @.35, and two new O2s along with some OBX LT's. Also yanked out all the EGR/AIR crap, i do however have two large holes in the rear of the intake where the EGR valve was since my block off plates didnt get here yesterday like i thought. So my question is did i make an existing problem that just randomly arose a week or so ago worse during the install, or is it possible i fixed one issue(the potentially fouled pkugs) and replace it with a worse issue in removing the EGR/AIR stuff?

 

Don't run a car with gaping holes in the intake...

 

You had the engine running without the EGR block off plates installed?

Quite the vacuum leak you have created my dear friend.

 

Yea there not here yet, should be tomorrow, hoping it resolves the issue

 

If you had left your EGR valve on there, it would effectively be a block off plate (with no vacuum to it). I'm surprised it ran at all with the hole open.

 

think ur plugs are gapped alittle too much. that is like nitrous gaps. .045-.050 should be fine

 

Actually made typo egr valve is still their just all the plumbing that went to passenger manifold and into back of intake is gone, its left a nickle sized hole yet it doesn't appear to pull vacuum when cars running. So guess its a mystery problem and not that. also always have gapped my plugs on my lt1s at .35 never any issue. idk what the f is wrong with it. makes me sad