My jeep has gone haywire

[radgilsn]

Here what happens I can sometimes start my jeep grand cherokee(6 cy 4wd)it will start then run for a random amount of time and then with out warning it will just quit. I have changed the ignition bar the spark plugs(the people who owned it before my didn't take care of this jeep)the Iac sensor and also the camshaft position sensor. Ive called the dealership and the say that it could be a computer that has gone bad, which will cost 500-900. so I need any ideas that you guys might have

Thanks

[mx52nv]

well, you already ruled out the IAC and TPS, so not sure what could be wrong. But if you want to replace the ECU, there have been a few on ebay for cheap. I also have local access to a few at the salvage yard if you need one.