F-body8708

iTrader: (3)

hey guys im goin to pick up a 97 z28 on sat wit 79k on it for cheap,
there is one thing wrong wit it the guy says the car will start fine and run perfect but after bout 10-15 min it starts runnin like **** bad
So here is what i think it is sounds like the 02's are bad on it wouldnt that make since since they dont start workin till after the car is warm up

let me kno what u guys think or if im worng haha thanks

F-body8708

iTrader: (3)

come on someone has to have an input on this

transamws6_97

iTrader: (5)

sounds like opti to me

sleeperMULLET

iTrader: (4)

get a scanner on it and see if the 02s are switching. Does it have any codes?

F-body8708

iTrader: (3)

idk if it was the opti would he still be able to drive it everyday back and forth to work he only lives bout 3-4 miles from work and drives the car back and forth everyday and it drives perfect but drive it longer than that and it starts crapin out

sleeperMULLET

iTrader: (4)

There is alot of things it could be man. If the o2s are bad it will more then likely set a lean code or a o2 code. If it starts acting up when hot it could be the coil, ICM, plugs, wires, ECT, injector, exhaust leak.

F-body8708

iTrader: (3)

ok just talk to the guy he said he ran the codes once and it was a rich and lean code so what do u think sleepermullet

transamws6_97

iTrader: (5)

rich and lean could be either o2 sensors or vacuum leak

jasonp31

Simple check I would do if I had this problem. Take the car out at night. Get it up to full operating temperature. Run one or two WOT passes. Stop and pop the hood. Are your headers/manifolds glowing? If so, replace the O2's. Check for vac leaks.

F-body8708

iTrader: (3)

also i have a set of new o2s for a 98 camaro will they work on this 97 ?

infinitebird

iTrader: (11)

O2s are definitely your issue, and no ones for a 98 will not work.

F-body8708

iTrader: (3)

have u had this same prob infinitebird or u just kno ur **** jw...... thanks for u help

chavez885

iTrader: (12)

well WHEN you pick it up,swap the 02's and you'll have your answer sir

infinitebird

iTrader: (11)

The problem you described (starts running bad after 15 min) is a very typical symptom of o2 problem (because the car is not in closed loop for the first few minutes).

If it was bad ignition it would likely run poorly all the time.

You can do the following as a test to be sure though, unplug one or both of the o2s and see if that improves things (it will stay in open loop and not use the o2s if they are not both plugged in). If it does then you know that is the issue.