I've got a 1987 2.8 work truck project I'm working on and need some ideas/help diagnosing the problem. It runs,but doesn't idle very well and sometimes takes a couple times to stay cranked. There is no check engine light so I can rule sensors and the other few things that report to the ecu out! I've gave it a complete tune up,plugs,wires and filters,fuel pump,map sensor,and fuel injectors and fuel pressure regulator. My next step is checking the IAC. Any suggestions on what else could be the culprit would be greatly appreciated. Thanks