Hey guys man i just bought a 1993 camaro z28 with a t56 manuel,at first the car was a dream ran so strong had so much pull trough every gear,about a week are so of driving it i noticed that in 6gear while crusing it would jump.Well know its running like ..... its spittin and spuddering and it all hit at oncemy code was giving off 26,not really a code that would cause my ride to barley run its burnig real rich its not burning all the fuel i can smeal it,also with in 5 sec of starting my car the fans come on even when its dead cold and the ac is off thats when you can hear the engine start to run like s...I really dont know were to go from here ive checked alot of things and its getting worse...This is not my 1st camaro so i know what i was getting into but from going to you could barley give it gas in any gear our she would walk,to having to pop the clucth and hammer it down to get it home im at a lose can antone pls give me some feedback.....tnks....

 

id go through it and give it a real good tuneup plugs wires coil maybe an opti pcv valve o2s replace all the fluids... see if that helps

 

check the fuse to the air pump. if ok, unplug the air pump at the pump. reset the computer by unhooking the battery for a few minutes. start and run untill it runs bad. scann again for codes. take plugs out and see if they are fouled. check 02 sensors to see if they are fouled. if either are fouled change. check fuel pressure, test evap sytem. check air filter. what plugs are in the car? lt1 does not like bosch plugs.

 

Well i put it up on stands i checked all plugs the looked like they were a little carbon burnt but nothing real bad..They had outolight's plugs in it all the wires looked good hell i went as far as cranking the engine a running my hands down all the plugwires thinking id get poped but i didnt so the wires are good,also checked the fuel it looked clean no water in gas,the distbuter had some oil on the bott of the opti spark that could be causing it to miss,but im really thinking thats not it the longer i run it the worse it gets so im at a lose.I took it to the best shop around here and it sat 4 a day the mac there are scracthing there head i had to tell them that the 93 didnt come with mass air,so know its friday my car is in the shop with still no ans on it guys if yall have any idiea pls post man i would love to go get my ride monday and fix it my self..Wife is on my a.. she thinks i made a bad buy,me i know its a mean car im thinking my ECU went out...IDK.. thnks 4 the advice keep it coming heck right know i need all the help i can get..

 

if the plugs are all black change em. what kind of autolites. i have not had any luck with any autolites. i would recommend ngk iridiums or platinums. did you flash the codes or scan for them with a scanner. if you didnt flash for codes try, i will sometimes get a different code flashing than i would scanning. pull the ecu out and see if you have water inside also check to see if it has an aftermarket chip in between the prom and ecu.

 

just so you know the ecu is not easy to find for the 93 z28, manual trans ecu is easier to find than the auto.

 

Yea i know that the autolights are a bad plug i do plan on changing them tnks for the heads up on the good ones.Yes i did the flash test on my codes and all im getting is a code 26 but i dont see that code making the car run so rough,o just so you know the motor has been out before i bought it i do have a few wires that dont conn any were on the car but like i was saying in my 1st post it ran asome for the 1st 2weeks,and no i havnt pulled the computer out yet but that will happen because i did take the car to the carwash and the aftermarket hood scoop thats on the car may have let that ECU to get wet,if so would it have ruinned it because me and my mecanic is thinking ECU,Because when you start it 20 sec later the fans come on and the engine tone changes meaning its in a closed loop.Right?Can you sugg somewhere i could find a ECU im running a t56 manuel....1993 vin p..Again tnks and anymore info could really help,maybe when i get back the way it was we can take a cruis...LOL..

 

you may also have a tune gone bad. when you pull the computer and take the prom cover off you will see if it has a tune. need to see what ecm and prom you have. look at the numbers on the ecm, like 15169278 also the prom code mine is bdzl but i am an auto.

 

Yea 4 sure i really do agree with you on that man you may have just saved the day,i cant do anything till monday my car is still in the shop and i dont think they open back up on the weekends but i do know the man so i prob go get my ride 2m and cheak on this,okay lets say it feal out of tune this i am new to im used to 86IROC,and when i went to cheack on my my ride todaythey were saying they might have to reprogram it and i ask how they would do it and they said it would be a standerd GM program,can it be custom?Because the way it was runin before this did not seem standerd.I will post 2m when i know more im hoping to get it all straight im sure we will,i will keep you posted and really thank you 4 your time and advice this seems to be a comon problem with the 93 so this could help some one else.....Im going to have to put my car pic up man it looks good,not as clean as yours the pics i seen of yours is clean looks like a lot of TLC...

 

this sorta gives a guy an idea of what a tuned ecm looks like. Documentation : Moates.Net heres some info from solomon a very good tuner LT1 PCM Tuning - Tips & Tricks for DIY Tuning!