Injector question

[ysteve]

Thank you. I am gonna take a look.

[355smallblock]

Do You Use A K&n Air Filter?

[ysteve]

Coils location i think you gave me wrong. 1-4,3-6,2-5 thats what i have. I tried your way my car didnt start. I am already on half a tank with seafom and no changes. I have major loss of power and hard shifting. And i do not think this is not trany problem, its like cat symptoms. From 1-2 you can feel harder shifting than 2-3 and less when 3-4. Its because bad engine operating, but i dont know.

355smallblock
Maf sensor is new ACdelco, but i never chack the connector. I am pretty sure nothing wrong with it.

[rhandwor]

typo 1-4 ,2-5 ,3-6 sorry about that Haynes 1995 thru 2000 Lumina&Monte Carlo

[ysteve]

You have any clues what else i could be?

[rhandwor]

Surely when you changed the wires you noticed a difference as the module sends the signal to the coils. I listed them 1-2-3 so 4 plugs would be firing differently. If this didn't help reply.

[ysteve]

Yes it was like 2 cilinders working only. Was a very hard start and backfire.
I have ALLDATA and i found firing order and it looks like mine exactly.

[rhandwor]

Good so it it working fine at this time.

[ysteve]

Did you ever heard that resonator or mufler can be cloged very much? And cuase bad cat symptoms.

[maxwedge]

Yes, mostly debris fom a bad cat gets caught in the muffler.

[ysteve]

Forgot to tell you, i dont have a cat right now and i put 02sim. What i did month ago i removed 02 sensor (cause it only like a plug right now) and did trip around the block. Almost no changes. Or this is not the way to check that.
Can this be involved, cause those hard to change: Crancshaft sesors and Camshaft sensors.
This only sensor wich i never touch, all rest of them was changed on OEM.
If you have more question go to "NO cat" bottom of page.

[maxwedge]

Drop the exhaust down and see if it runs better.

[ysteve]

What you mean drop it down? I dont have a lot of money for experiments.
I thought its gonna stuck in resonator then in mufler. And how i can test my self what is that exactly?
Thank you

[richtazz]

By "drop the exhaust down", Max is suggesting you disconnect the exhaust to see if it is restricted and causing your issue.

[usarmy]

I have 03 impala, with 3.4 L and on avarege i get about 18 mpg... with 106.000 miles...