ZC motor boggin out at 4500RPM? Please help..
I've tried timming, plugs, wires, and ECU.... any help would be appreciated...

 

if its bogging, sounds like your timing is off.

 

It wont rev past 4500RPm... Ive tried timming...
Any other possabilites?
Maybe distributor?
This is acctually a friends car that I work with..

 

it may need a fuel pump or a new fuel filter check 2 white wires on the distr make sure the big white wire is hook up to the big white wire. and the little white wire are hooked up right the 2 wires look the same.

 

may also be clogged fuel injectors, try cleaning them

 

Do you have any CEL codes?

 

If its bogging and your 100% sure the timing is correct then it can be either not enough air, or not enough fuel. Check and make sure you tb is able to achieve WOT, could be its getting stuck and not opening all the way. Then go to what other people said, clean your injectors and replace your fuel filter. If still bogging check your fuel pressure. I dont have my manual around so you'll have to find those specs.