possible spark plugs throw off tune?
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Staging Lane
Joined: Feb 2009
Posts: 98
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possible spark plugs throw off tune? Installed a new cam. Car wasn't running bad. Had some knock and new spark plugs was the theory that would help draw more power. Took out old spark plugs and they we're in rough shape. Old and fuckt really. Put in new ngk tr555 now its running Like ****. Feels Like somethin is holding it back when I step on it. Def lost power. Is it possible the old spark plugs we're that fuckt that new ones would throw the tune off or is there something else wrong?
What all has been done to the car. That would kinda help us try to wind this down, but really the only way you are really going to know this is if you go to your tuner and have him data log for you and tell you whats wrong because here we are just speculating.
Now can spark plugs throw off your tune, I have never experienced it but it doesn't mean that it can't or has not happened.
Oh before I forget if your SP where in that bad of shape am sure your wires are not in that good of shape either.
Now can spark plugs throw off your tune, I have never experienced it but it doesn't mean that it can't or has not happened.
Oh before I forget if your SP where in that bad of shape am sure your wires are not in that good of shape either.
Thread Starter
Staging Lane
Joined: Feb 2009
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I have LS6 heads and intake. Pace setter headers. Borla exhaust. 228/232. 112+5 cam. It was working fine until we changed the spark plugs. There was a bit of knock left in it. Less than 2% and it was suggested it may be the spark plugs and when we looked at them we figured it was cause they were fuckt. My wires are new. Why I didn't change plugs and wires at the same time I don't know. I also have a wifeband gaugar and that reads as if air to fuel is fine. I can't get on the tuner til Monday so I'm more or less wanting to know if its major or if its minor
I have LS6 heads and intake. Pace setter headers. Borla exhaust. 228/232. 112+5 cam. It was working fine until we changed the spark plugs. There was a bit of knock left in it. Less than 2% and it was suggested it may be the spark plugs and when we looked at them we figured it was cause they were fuckt. My wires are new. Why I didn't change plugs and wires at the same time I don't know. I also have a wifeband gaugar and that reads as if air to fuel is fine. I can't get on the tuner til Monday so I'm more or less wanting to know if its major or if its minor
Make sure you have the correct plug. If anything go back to an ac delco plug just to make sure.
And I always have my tune done with the type of plug I plan on running. If I change types of plug then I retune.
And I always have my tune done with the type of plug I plan on running. If I change types of plug then I retune.
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Thread Starter
Staging Lane
Joined: Feb 2009
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Joe (JPH) designed my cam and suggested the NGK TR555's. I'm taking it to Canadian Tire tomorrow to make sure that the guy who put them in gapped them properly because it shouldn't be running this shitty. **** this pisses me off. It's running like ****, no pick up, bucking kind of, Def not getting all sparks.
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Thread Starter
Staging Lane
Joined: Feb 2009
Posts: 98
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Sorry I'm doing all of this from my phone so it ducks up the spelling. I just took it out for a drive. Its Like it lost power. The plugs we took out had a big gap in them. Is it possible that the smaller gap on the ngk tr555 would be making it work Like this or should I take it to a garage and get them to recheck the gaps? Like I said before it was working fine until we changed the spark plugs..
Ok, I'm assuming you mean TR55 plugs, not TR555. If they are copper plugs like the TR55, then sure, adjust/gap them (about .040" should be fine). I really think you're barking up the wrong tree unless you have defective plugs or something. Check to make sure all the plug wires are in good shape and securely snapped into place, on both coils and plugs. If you still have a loss of power, do a compression check.
Thread Starter
Staging Lane
Joined: Feb 2009
Posts: 98
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So the TR55's would be fine? They wouldn't be too cold for my set up?
1999 Trans Am WS6 6 Speed
LS6 Heads and Intake
228/232 112+5LSA cam
Pacesetter Headers
Borla Exhaust
The car was running fine, just a touch of knock that was read on the dyno so we changed the plugs cause they weren't changed in a while and that's when the problems started so I figure it's def the plugs. and I think he gapped them for .50 Would this be causing the problem?
1999 Trans Am WS6 6 Speed
LS6 Heads and Intake
228/232 112+5LSA cam
Pacesetter Headers
Borla Exhaust
The car was running fine, just a touch of knock that was read on the dyno so we changed the plugs cause they weren't changed in a while and that's when the problems started so I figure it's def the plugs. and I think he gapped them for .50 Would this be causing the problem?
NGK list a 0.040" gap for the plugs for this year model. The larger 0.050" gap would theoretically make a difference only if your ignition is not strong enough for the larger gap.
Thread Starter
Staging Lane
Joined: Feb 2009
Posts: 98
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Ignition is stock, only thing around there I have changed is MSD 8.5mm wires I put on a few years ago..and well the spark plugs yesterday. Any suggestions on wtf I should do. I mean, should I take them to Canadian tire to have them make sure they are properly gapped? Or should I figure the old spark plugs were that fukt up that when I installed new ones it affected the tune, and just have it re-tuned on the dyno?
Ignition is stock, only thing around there I have changed is MSD 8.5mm wires I put on a few years ago..and well the spark plugs yesterday. Any suggestions on wtf I should do. I mean, should I take them to Canadian tire to have them make sure they are properly gapped? Or should I figure the old spark plugs were that fukt up that when I installed new ones it affected the tune, and just have it re-tuned on the dyno?
The rule of thumb for a LS1 is for every 100 HP increase in power (like heads, cam, etc) you should drop down to the next colder plug which would be TR6. The TR55 plug is a half step colder than stock, so I would think it should still work. I still think the wires didn't get stuck on firmly or something like that. Still, by all means, pull the plugs back out and gap them (check for cracked insulators) or throw some TR6 plugs in there, but also check your wires. You said new wires, but what did you use? When you pulled the wires off the plugs to change them, you might of pulled a connector loose. I would use a multi-meter to check resistance of all the wires to make sure they are all the same (within a few ohms). We can't tell you exactly what's wrong, you have to start testing and checking things on your own. Good luck, I know it's frustrating.
Thread Starter
Staging Lane
Joined: Feb 2009
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Yeah, I'm thinking I'm going to keep my appointment at Canadian Tire tomorrow and tell them what i want done, I don't have the time or money to be paying this mechanic top dollar to be experimenting I don't think. And at least they will have the AC delco's in stock too most likely or even a set of Champions.