I have cleaned the MAF and air filter. I have also ran seafoam in one tank and Techron in another. I have a new fuel filter I need to get put it. I've heard the MSD wires are good, what plugs do you reccomend? I basically have no mods planned if it holds together. I just want it to run decent for now. No need for crazy hp #s since its just a daily driver. Along with fuel filter, plugs and wires I may consider doing O2's as well. I'm alittle concerned about doing the these things though because of the super tight spacing.

 

Since 2006

 

You're only getting 22MPG on the highway with an M6? My '01 Z28 averages 25-26MPG on the highway, and it's an A4... I cruise at 65MPH-70MPH. Best fuel economy I ever got was 29.8 MPG on a 100 mile trip, going 55MPH the whole way.

I'd say sea foam it, new fuel filter, new oil change, and get a lid. All of those will help with fuel economy, and get you a few HP.

 

New Fuel Filter, New plugs, wires, and run 93 in it from now on.

It is a sports car with 10:1 CR from the factory. Really I don't see how anyone could not know that?

It doesn't make you an idiot though, and people need to help the guy out first and see if he takes the advice given which so far he has when it has been given.

New fuel filter, wires and plugs and premium from now on.

If after you change the plugs and wires it knocks you may need to replace the knock sensors, really though if you could take it to a tuner he could probably tell you what it is doing by looking at the data log from the car.

 

I always run premium in my car, that's what the owner's manual says. Lowest I have ever put in it was 91. Around here it's always 93.

 

Nothing buy 93 here. If it is a pump that only has one nozzle for all the different grades I go to a different gas station. I dunno if it still as 87 or 89 in it, I am that **** about it.

Before I go the track I put 3-4 gallons of 110 in with a gallon of 93 to get some unleaded fuel in there.

 

Don't think any gas stations in this area have anything over 93...

Does running 110 give you any extra power? What's the point of it?

 

No, your car is basically stock judging by what you have listed in your signature, it will do absolutely nothing for you, I wouldn't be surprised if it made your car run slower actually.

Back on topic, OP, just sounds like your car just needs a good complete thorough tune-up. Even though it only has 47k, it seems like it wasn't maintained well judging by the way you're describing the car. The knocking you're experiencing can't be good either, might have something to do with the gas you've been running through it.

 

Yes MSD wires are proven. I had a high dollar set of wires dyno'd on my car and showed no gains.

Most people run NGK TR55 plugs. I've ran them in the past and didn't have any problem with them. Take that for what it is.

I agree seafoaming it wouldn't be a bad idea.

If you are getting an audible knock try to find someone with a scanner. Even basic scanners will show knock retard. If you are hearing an audible knock maybe its spark knock or maybe it's something else.

With buying a car that you don't know the history of there is no telling what has been done to it.

Bone stock these cars run pretty damn good and are easy/fun to drive.

I do admire you continue to post in this thread despite all the bashing in this thread.

Keep at it and you will find what the problem is. I would also check the fuel pressure under load if you can. I don't know how mechanically inclined you are but a drop in fuel pressure can cause strange problems too.

Keep us updated.

 

And for fuel mileage. My Firehawk stock except for a lid got 15-16 mpg regardless of how I drove it. I rarely drive all highway so I never monitored that. My car is a 6 speed w/ 3.42 gears. I don't short shift at 2500 in every gear so maybe that's my problem. If you want 20+ mpg city a F body is probably not the car for you.

You will see the occasional thread on here about people getting crazy mileage from these cars but IMO it's the exception more than the norm.

 

So what is the point of 110 fuel?

 

Are you sure you're just not lugging it really bad? How low rpms are we talking here? if you're punching it at 2k, then yes it will feel slow.

 

Too hot to feel the full fury of these cars.
Friend of mine had 02 TA w/Lid as the only mod, all else stock, Ran 12.80 @ 109mph

I would use some GTO plug wires from GM.

Friends and I drove a crap ton of LS1 cars from car lots. Some were fast and other were freaking turds. It all depended on how much respect the previous owner had for the car.

Anyways you may want to pull your pushrods and check those for any bends. And if they are black, sludgy and filthy, then somebody fibbed about using synthetic.

 

The point with running 110 in my car is a safe guard against detonation.

Since I am running boost it allows me to turn my methanol system down a level and lean my car out some to take advantage of the extra octane.

Without a lap-top and HPT on hand right then or having your car tuned for a couple extra degrees of timing you won't notice any gains by using 110 or higher.

As I said I do it as a safe gaurd and it allows me to make about 20-30 more horsepower.

Mainly it is a safe guard.

 

THIS hahahah smartest answer ever

 

Wait, so is it a safe guard or what? Sorry had to bust ur *****, just messin around with ya. If I could afford to run 110, I would too.

Yeah, find a used aftermarket catback if dont mind spending a few pennies as that flowmaster is like putting a giant clamp in the middle of your exhaust. Even just replacing the muffler with something like a magnaflow would work and would cost under a $100 and stainless too.
I know you dont want to spend the coin, but an ls6 intake really made a difference up top for me when I changed mine. You can always take it off and resell it too when you get a new car.
If you really want to wake up the car; lid, ram air setup, headers, catback or aftermarket muffler or even a cutout, and a short-throw shifter would be like night and day.

 

There is a difference in running higher octane fuel in a F/I car than a car with stock compression.

And yeah. I'm sure the Flowmaster is killing power

 

Funny guy!!!

I don't run it all the time, only before I go to the track AS A SAFEGUARD!