I think I need a tune, long story. - NJFBOA - Home of New Jersey's Camaros and Firebirds

sleeperMULLET · 09-20-2006, 09:52 PM

Hey guys, I posted this on another tech forum but I want to see if any local people have any ideas, I aapreicate all help:

Ok guys, I really need some help. My mods are in my sig.

On startups whether the car is cold or hot I will get knock retard in OPEN LOOP only. Starts at 7º then goes down slowly until its around .3 or .1
While its doing this, and its still in open loop, the o2 voltages stay still, its not going up and down like its supposed to. I don't know if that will effect anything even though the voltages are disregarded in open loop.
Still in open loop the IAC count is at 160 with TB set screw all the way open.

As soon as the PCM goes into closed loop the knock retard goes away.
The IAC count goes to 0 and the engine idles fine for a few minutes then it drops 200-300 rpm and then goes back to 1000rpm. I have my idle set screw at 1000rpm because if i lower it more then IAC will max itself out.
So when I drive it there is no knock retard at all, I can go WOT and there is none at all. When I look at the IAC counts with my foot on the gas they go up. When I come to a stop, they go down until they hit 0 if i'm stopped long enough.

I'm going to drive around tommorow with a laptop to get a good datalog.

So today I changed my oil and it was a bit dilluted with gas, i think its either from the knock retard causing a little blowby if thats possible or the rings aren't seated yet. The engine currently has 120miles on it.
When I started the car after the oil change it still does the same thing in open loop, but i let it idle for about 10 minutes, and I pulled the fresh air tube off the TB and a little bit of smoke was coming out. I took the oil cap off and the same smoke was coming out. There was a little bit of oil where the tube conncets to the TB and a little bit behind the TB blades. I took out the PCV valve and there was a bit of oil on that too. I'm going to do a compression test to make sure everything is ok.
If i'm getting excessive blowby will I feel a lose of power? The car feels so fast, I broke traction when I punched it at 65mph.

One more thing, when I'm crusing to a stop or just let of the gas at low speeds the car bucks a little bit. When I get the rpms above 2000 it goes away, it doesn't feel like a missfire, is this cam surge? I have the CC306.

I don't know what is going on with it and its driving me crazy. All help is greatly appreciated. Thanks in advance.

Formulalt1 · 09-21-2006, 03:53 AM

Did you send your scans so far to Bryan at pcmforless?. He is good but you might be in the Dyno tune range now. I know he is dyno tuning my car just as soon as he is in this area. I would definetly have him look at your scan though, he has looked at a few of mine in the past and tweaked my tunes to help with driving conditions.

sleeperMULLET · 09-21-2006, 07:04 AM

where will he be? I don't know anyone in SJ that will dyno tune. I'm going to get a datalog today and I will send it to him.

Tru2Chevy · 09-21-2006, 09:52 AM

Quote:

Originally Posted by sleeperMULLET

where will he be? I don't know anyone in SJ that will dyno tune. I'm going to get a datalog today and I will send it to him.

I don't know how often he comes into south jersey, but I know he usually does several tunes a year in eastern PA.

- Justin

Formulalt1 · 09-21-2006, 05:42 PM

He is currently working on getting out this way but Tru2chevy is right that he does have some dates scheduled already in PA. I bet he would probably be able to get a date out this way sooner if the demand was great though.

sleeperMULLET · 09-21-2006, 09:56 PM

does he sit in the car with a laptop or does he dyno tune it? who else needs a tune, maybe he can come to NJ?

Formulalt1 · 09-21-2006, 10:07 PM

Quote:

Originally Posted by sleeperMULLET

does he sit in the car with a laptop or does he dyno tune it? who else needs a tune, maybe he can come to NJ?

He dyno tunes it. He sent me a PM a few weeks ago and said he was going to be a few hours from me in PA but I asked him to keep me in mind for coming out a little closer this way. I am sure if we can get 4 - 5 people together that he would probably be able to schedule a date sooner rather than later.

sleeperMULLET · 09-22-2006, 06:56 AM

So you need a tune too? Maybe we should start trying to find people so he could come out here. What do you think?

Formulalt1 · 09-22-2006, 12:35 PM

Quote:

Originally Posted by sleeperMULLET

So you need a tune too? Maybe we should start trying to find people so he could come out here. What do you think?

Yes, I am still waiting for a concrete date and location from him in the near future but he did say he is working on some dates for out this way. I think he would probably be eager to get out this way if there were more people in need of tunes.

sleeperMULLET · 09-28-2006, 02:00 PM

ok i finally got a datalog today, i used Datamaster. all help is appriciated becasue i'm going to lose my mind soon. http://www.simplefile.net/d.php?id=626939d442

Njgunslinger · 09-29-2006, 05:53 AM

Go to East Coast Supercharger near Great Adventure, they have a very good reputation. I am in NNJ and had work done by TTP and I am going to get East Coast Supercharge retune it since they didnt do a good job

Tru2Chevy · 09-29-2006, 09:09 AM

Quote:

Originally Posted by Njgunslinger

Go to East Coast Supercharger near Great Adventure, they have a very good reputation. I am in NNJ and had work done by TTP and I am going to get East Coast Supercharge retune it since they didnt do a good job

Does ECS tune LT1's?

- Justin

sleeperMULLET · 09-29-2006, 10:45 AM

i just checked and ECS only does LSX engines