fuel treatment good or bad?????

[1defyag]

Heres the deal. I had a brake line bust last week so my truck sit for a few days before I could get to it to fix it. After about a week I started it and it has a horrible miss. New plugs and wires. I don't have a clue what would cause this. I put a fuel treatment in it about 2 weeks ago. Could this cause the problem? Like I said it just started out of the blue, so I'm sure its not tune up related. But the n again I'm not a very good mechanic lol.

Would really apprechiate some advice, thanks in advance

1997 Gmc Yukon.

 

[1997Yukon]

Which treatment did you put in? I just put some Lucas injector cleaner in mine and it seemed to clear up the little miss it had.

 

[ravingmadman]

Um, put a good tank of gas through it, and do some seafoam, if you're looking for anything to add to your fuel. Then do a tune up. New spark plugs at the least.

 

[1defyag]

I used super tech. It had been in my garage for a while couldnt find an exparation date on it, so I used it. If it was bad would all I need to do is run it out?

I put some premium gas in it earlier, going to get the stuff for a tune up in a bit, its not getting much better. Its really bad, I'm worried about driving it to far. I'll run it around some more and see what happens thanks guys..

 

[TheBeast99]

Which treatment did you put in? I just put some Lucas injector cleaner in mine and it seemed to clear up the little miss it had.

ya i just used that same Lucas lubricant. i'm hoping it'll eventually clean out some shit in my engine. though it hasn't done anything to take care of my hesitant starting (which i was hoping had to do with my injectors). but then again, i've only gone 100 miles. i still have a lot of the stuff left, so we'll see... i'm still hopeful for eventual results.