CodyZ28

Well I get a call and they are Dynoing today for $30 for two runs. I was like great I want to see what the Camaro lays down. I start it up and its running like crap, surging... I give it some gas and keep it around 1000rpms. Take off down the road when it settled and it started surging, SES flashes.. CRAP...
Well took it to my buddies dads shop and has this sweeeet Mac Tools Diagnostics computer the size of a car charger, digital screen and stuff. Says I am misfiring on 5,6,7... He said it has to be plugs by the pattern it was doing it. So I am changing my plugs tomorrow, NGK TR55's??? First time changing plugs on a LS1. Did plenty of them on a Vortec 350...

hurley_21_07

iTrader: (1)

Have fun. Drivers side is pretty easy. On the Pass. side, if you have AIR, remove that metal tube. Then take off a few ignition coils from that side and it makes the job much, much easier.

Dan

raven_450

iTrader: (3)

the number 8 is always fun to get to for the first time.

CodyZ28

A/C or the Air injection smog crap? The Smog craps been taken off

CodyZ28

So far I got the drivers side done, and on the pass. i took the coil bracket assem off, makes it 120% easier, REALLY this isn't as hard as what ppl proclaim it to be... But could be im pretty mechanically inclined. lol
I got NGK TR55 Irdiums, set me back 60 bux .. Their gapped @ .055 and in my owners manual it says .060, then i read on here ppl say .044-.050... wtf should i set them?

CodyZ28

wow... I gapped @ .056 And its definately got a lil bit more *****. I my wires could be the main problem, their Autolite 7mm's... not my choice for sure.

00T\A

Much easier with coil packs removed.

CodyZ28

Well I guess that wasn't my problem. I took it out last night and it ran HORRIBLE... Misfiring, backfiring... SES flashing. Somethings f'ed up bad. I guess I will replace the wires next... After that I really don't know.

XpEdItIoUs

iTrader: (44)

It wouldn't doing a fuel injection service.

CodyZ28

Ya its crossed my mind could be clogged injectors on 5,6,7 ?

EPP

iTrader: (22)

The first thing I would do is to replace the front 02 sensors. We see the 02's as the problem most of the time. Bob

blueZ28beast

I would love to know if you ever solve this. I have the same exact problem. I have changed just about everything; plugs, wires, fuel pump, O2 sensors. And it still does that crap. I had a guy tell me he thought it was a coil pack. Another guy tell me that I needed a tune because I have a bunch of mods with a stock tune. So best of luck to ya

CodyZ28

Ya its pissing me off. I wonder if there is a way to test the coils??/ There a bit expensive to just go replacing just stabbing in the dark hoping its the problem lol
Glad its just my weekend toy and I got my reliable truck to get me around.

Roarin_8

iTrader: (5)

I'd get the sensors tested first and see how much voltage they are putting out, those would be the first to check.

hurley_21_07

iTrader: (1)

When I had a bad 02 it only misfired the drivers side cylinders...hmmm. It was a rear drivers side one though.

Dan

CodyZ28

I got SIM's on the back. no cats

Roarin_8

iTrader: (5)

The SIMS are just to fake the computer to make it think that there are still CATS on the car. You don't need them if you delete the rears through tuning. The 02s that people are talking about are the front ones off the headers/manifolds, those are the ones that are important to have and make sure are working correctly.

Check out this thread, https://ls1tech.com/forums/general-maintenance-repairs/794590-car-stumbling-need-help.html

98silvertacrbn

iTrader: (106)

Hook a timing light to the wire that you are going test and point it a random place to see if the coil is working

CodyZ28

I will try that thx

EPP

iTrader: (22)

We had a Trans-Am that was having random mis-fires about three and a half years ago that drove us nuts. It turned out to be the valvesprings. We took them out and set them on a piece of glass, and they were all at different heights. This was on an internally stock engine with 30,000 miles on it. Bob