Hi guys I'm a new owner of a 99 z28. I been a part of the turbo buick community a while. I use to own 2 Grand Nationals. I decided to sell one and keep one. I being seeing guys on the turbo buick forum swappin over to ls1 I decided to give them a try. I couldn't do the swap into the GN it just wouldn't be right. I just found out the 99 z28 have the 5.7 instead of the 5.3. Is there any advantage in having this year model. The car has SS hood and wing, Hooker long tube headers and slp loud mouth exhaust. Car runs ok but idles up and down and seems to bog down when go over 50 mph. I accellerate and nothing change seems as if rpm never increase. I have a check engine light on and I went to auto zone it threw about 7-9 codes: P0154,P0412,P0418,P0480,P0481,P0507,P1635,P0135,P0 101. I only paid 3700 for the car so i don't know too much about these cars but I am a little mechanically incline so I do try to do all my repairs myself. i just want to know where to start off. i looking for a mid 11 sec car maybe high 10s. Please help me out.

 

Looks like you got a hell of a deal.Try cleaning your mass air and fuel system and maybe a tuneup.

Sorry not as helpful as others's,but i've learned start with the basics first.

 

Ok I will start there but hopefully the vets will chime in shortly.

 

Come on guys 108 views and 1 reply. I thought i could get some info here. Am I asking these questions in the wrong area or something. could some one please point me in the right direction.

 

WTF Come guys tell me something.

 

Low post count=no love

 

the only thing i can tell you is see what the codes mean. maybe check the fuel pump?? sounds like the motor is in limp mode if rpms dont go up. Its cool to see another person from LA. Im in thibodeaux. About to buy a black 98 trans am in a wee or so. welcome