car running bad....

**barnac0** · 06-16-2007, 05:09 PM

I had my car in a local shop here getting some work done. They installed my QTP heades, QTP y-pipe, MSD wires, NGK plugs, and borla cat-back. The 1st day I got it back it ran like crap and my ses light starting flashing at me. I stopped by Thunder Racing and one of my spark plug wires was loose. They will be giving it a basic tune this Monday. My problem is that I don't have the low-end tourqe like I use to have before. When I take off it just lags a bit then it takes off eventually. I here a little knocking underneath my car, wtf? Has anybody had this happen to them before? What fixed the problem? Will the tune take care of this. I'm just really sick that I had all this work done and my car runs like crap and it seems slower.

**INMY01TA** · 06-16-2007, 08:15 PM

It may "seem" slower on the low end but the top end will more than make up for it. Let Thunder tune it. If the y pipe is banging the floor board, tell them. They should be able to take care of that as well. I bet a "post long tube" quarter mile ET slip will say your car is faster.

**SeVeReDiStOrTiOn** · 06-16-2007, 09:01 PM

Don't go back to that local shop, if they gave you the car back with loose wires then they're not worth a shit...especially after spending the money that you did there.

**barnac0** · 06-16-2007, 09:13 PM

What would a cracked spark plug cause the car to do? It just hesitates before it takes off. Seems like it is missing. I've noticed my gas mileage seems shitty!

**SeVeReDiStOrTiOn** · 06-16-2007, 09:19 PM

Is the ses light still flashing? A crack plug can cause a miss..

**barnac0** · 06-16-2007, 09:33 PM

Its not flashing anymore. It just stays on. He told me the tune will turn it off. I guess my questions is, is this normal after a header install for it to seems like it lagging on the low end. It doesn't want to spin the tires like it use to.

**INMY01TA** · 06-16-2007, 09:40 PM

Never heard anything but good about Thunder. When they tune it the SES light will go off.

**INMY01TA** · 06-16-2007, 09:42 PM

Long tube headers will make your gas milaege take a dump. Maybe you should have looked into the pros and cons before doing these mods.

**barnac0** · 06-17-2007, 09:24 PM

I did my research but I didn't think it would be this bad. Hopefully the tune will fix alot of my problems.

**SSpdDmon** · 06-18-2007, 10:01 AM

Make sure your sensors (MAF, front O2's, etc.) are connected and working properly. If they couldn't hook up a plug wire right, who knows what else they may have missed.