oifish

iTrader: (1)

Hey everyone, my brother has a 92 Z28 with the l98 just today he said the car sounds different and there is shaking above 2K rpms

I asked him if he was down on power and he said it still feels the same but there is just shaking

When we bought the car a couple months ago and we had a mechanic look at it. he said the spark plugs looked fine so i dont think that is the problem

He runs the car on regular and since it is older I was thinking maybe the distributer is a little gummed up or something?

So what do you think? I haven't actually been in the car yet so im not to sure also, but im thinking its something with the ignition

im thinking the first step would to throw a couple gallons of premium and see what happens

thanks

MdFormula350

iTrader: (4)

check timing should be 6 degree advance stock
check plug wires
might be fuel related replace fuel filter, and run at least 91.
check air filters.

I would say check maf but 92 is speed density so no maf.

also do research on www.thirdgen.org since they only do thirdgen related stuff.

oifish

iTrader: (1)

yea he is a member over there so im sure he has posted something.

he never has changed the air filters so ill tell him about that and about the timing

we will see what happens