dkishton1486

Ok well as some of you may he read a few posts ago I got a new LT1 crate engine put in because #1 rod spun a bearing. Well I got the car back and it has a miss in it. Now im just wondering if the opti was put on wrong would I notice a miss at idle? Because heres my issue at idle id bounces from 800-824rpms which seems fine and its ok now when im driving I can feel the miss and DEFENTLY in 6th gear its really bad to where the whole tranny feels like its about to shake out of the car. Also I do notice that on my A/F ratio gauge its showing that its running lean. I checked all the wires on the opti and all the wires havee gone to the correct plug so im just wondering if a wire went bad? Like I said the car idles fine and you can feel the miss while driving. Oh yeah it feels best in 5th gear not too much shaking.... ALSO could a leaky header cause this? Because my passengers side header is leaking REALLY bad hence why I just ordered new headers today and I already got the car jacked up and the old y-pipe off and going to start on the manifolds tomorrow

dkishton1486

for some reason im still leaning towards a wire because it idles at the idle its supposed to the tech2 said idle speed at 800 and it was idling at 800-825

xx_ED_xx

iTrader: (17)

holy f*cking spell check bat man

dkishton1486

haha wow.........

ss.slp.ls1

iTrader: (36)

It would be a good idea to change the plugs and wires. Get NGK TR55's and some MSD 8.5mm wires. Take care to hook the wires up correctly and to keep them as far away from the headers as possible. I would also get your coil tested.
I don't know what year car you have, you didn't say and you should have it in your sig. If your car is a '95-'97 then it wouldn't run if it was put on incorrectly. Also if your header is leaking badly, it could be fouling out your o2 sensor. I'd try to disconnect your o2's and see if any of your symptoms disappear. One last thing to do would be to clean your MAF (assuming you have one).

dkishton1486

CRAP! Sorry....Its a 95 with a 6spd in it. I did have them install new plugs and opti. They were MSD 8.5mm wires on the car and I did notice that the passengers side wires were all ran together and bunched together dont know if thta has anything to do with it. I did notice my A/F gauge was readin lean

ss.slp.ls1

iTrader: (36)

Well a misfire and a lean A/F ratio seems contradictory to me. That's why I would suspect your MAF or o2's.

dkishton1486

I do have a new MAF sitting in my tool box so after I install my new headers next week ill put it in and ill pull the plugs and put new wires on

pmbmax

The car will run with the MAF unhocked the ses light will come on and the fans.But it is a way to swe itf it is a maf . If you have a cylinder that is dead the oxgen will be high coming from thar one and the o2 will see a lean condition. I would ohm the wires if you have a temp gun shoot the exhaust ports and see what hole is dead. The manifolds are harder than headers to check but it will tell you what hole is dead. I would beat you have a bad plug or wire. Who put the manifolds on and when was the plugs put in . ( after the manifolds was put on, after it was put back in the car, just drop a plug 1 out of 10 it will damage it , if i drop it it is thrown in the trash) Could be a cracked plug as well.

ss.slp.ls1

iTrader: (36)

If he had a dead cylinder, he would be flooding it with fuel, and it would read rich, not lean. Now bad injectors could cause a lean condition...

dkishton1486

The dealership put the manifolds on when they instaleld the engine.

pmbmax

You are wrong it reads avaible oxygen . When it is turned into an air pump the bank will show lean . These are narrow band O2 most of the fuel will be burned in the exhaust because of all the oxygen beong pumped in it.

dkishton1486

Yeah I could faintly smell raw fuel

pmbmax

Can you get your hands on a temp gun? Try to narrow it down to one cylinder. i would look at wires and plugs. as said befor I bet you have a bad wire or a cracked plug. I have a 95 not fun to check stuff if it still has a/c. If you cant get a hold of a temp gun start pulling plugs it will show you. 6 and 8 are the ones that give the most trouble because of the dipstick.

dkishton1486

Well right now its on jack stands with the stock y-pipe off getting ready for the new headers. I do have all the passengers side wires off and im gonna try to pull the plugs tonight

I8ASaleen

iTrader: (9)

Pull plugs, wires, O2's, and the manifolds. From there you should be able to tell what's what.

dkishton1486

I pulled the one O2 out of the y-pipe it was a grey

dkishton1486

ok well I pulled the wires I did notice a jump in 1 wire really bad. Heres what I got I only recorded1 wire because it was really out of wack
Wire #8 33" Long 80-83 OHMS
Wire #6 29" Long 130 OHMS

dkishton1486

would this be the problem of my misfire?

dkishton1486

Ok well I found my misfire... My #7 wire was almost cut in half the damn mechanic didnt install it correctly in the metal protector. Im gonna make them buy me a new set of MSD wires