i payed $550 for a whole magnaflow dual exhaust system (muffler-$190,2 pipes- $30, 2 tips-$90).
they kept the stock exhaust. Is that a good deal or no? my dad said they ripped me off. but i want to make sure.

 

Last chance for inputs, I'm off to the muffler shop in 7 hours.....

 

Well, its all on. BUT....the shop did something to my truck that I cant figure out. I thought it was a leak causing the O2's to read funny and cause drivability issues. Then I got some P0300 and P0200 codes so i guess they dicked up the injector wires or screwed up some plug wires during install. I am replacing all the plug wires now. I'm half done with no improvement. There is no low end tq. It sputters and pulls and then doesnt pull and the exhaust smells either rich or lean I dont know. I am definitely down a cylinder or 2. So I'm trouble-shooting wires etc since my hard drive is broke and I cant log or scan with EFI. I am stuck using my Predator Any ideas I can try?

I'm cursed.

 

Sounds like a loose injector wire causing one cylinder bank to show lean and the other injectors trying to compensate by going full rich.

 

Thats what I have been trouble shooting. I cant seem to find which injector is not getting power. My laptop is out of service for another week or so so I cant log or read detalied codes. Like what cylinder has the most misfires. So I'm working blind. The harness has 8.5v on all injector clips but I cant tell if the connection from the harness to the injector is solid. I've had this issue before. Even pulling the clip off while at idle doesnt create a noticeable difference for my to eliminate it that way. Could there be a bad O2? Maybe they dropped them or something and damaged it. I'm supposed to be on the dyno at 11 tomorrow

 

I replaced all the plug wires but not the plugs, Autozone had 1 in stock....who carries 1 plug????? For a moped? One did have a funny spot on it and another had an ever so slight bend where the tip screws on which is bent back. So I may try to find a set of plugs early tomorrow. TR-6 gapped to .035 correct?

 

correct and good luck....

 

I paid 285 for my header install and custom y pipe. It is only a custom y because of collector location was not in same line as stock.

 

sounds like they smacked a plug while putting on the header could have boke it internally and you can't see it. it would cause it to be intermitten. that would also cause a rich condition lol if the fuel is not being burnt cause of no spark.

 

Figured it out. A plug change did the trick. There was no damage that I could see but after the new plugs it ran great.

Here are some pics:
















After getting it on the dyno, I had some issues. Because I can never get on a dyno without "issues"
I blew the tailhousing gasket. It was leaking already but the dyno finished it off. Gonna have to replace real quick.


This is what the parking lot looks like at the dyno, I think they are GM fans:


Also, I lost a full 2 pounds of boost with this exhaust set up. I'm sure the 112lsa cam with 52* of overlap isn't helping. I have a 2.75" pulley and am only getting 7psi. I made 450hp/460tq today. These are the exact same numbers as before the long tubes and true dual. However, I'm making with it with 2 less pounds of boost. I guess I can either predict a cam swap in the future or just be happy with it for awhile. So same power, less stress on the engine, and $1000 lighter in the wallet Mods are fun Sound clip will be coming soon.