IAC on 2.8 multiport

The bad idle _could_ be related to the IAC but the other symptoms lean more toward a failing fuel pump. Check the fuel pressure. Before replacing the iac, take it off and clean the carbon out of all the ports in the iac and where it attaches. A 9v. battery will make the iac go in or out a bit each time you touch the contacts.

James Goforth wrote: =A0=A0=A0=A0What would be the symptoms of a bad idle air control motor on an '88 Cavalier 2.8 multiport five speed? =A0=A0=A0=A0This car often is difficult to start, sometimes cranking 5 seconds or more without firing at all, and I've taken to depressing the accelerator slightly to get it to start, which (I think) helps. =A0=A0=A0=A0Occasionally it starts right up after only a second or so, like it used to. Being warmed up or cold doesn't seem to make much difference. =A0=A0=A0=A0Also, lately when I pull up to a stoplight it sometimes will idle down so far it almost dies, then idles back up, then down, etc. =A0=A0=A0=A0=A0=A0It displays no codes. =A0=A0=A0=A0It has, within the last 20k miles, had a new MAP, TPS, and ECM, as well as plugs, wires, & reconditioned heads. =A0=A0=A0=A0=A0=A0Anyway, would the above symptoms be indicative of a bad IAC? =A0 Thanks in advance. **************************************** Paul wrote: The bad idle _could_ be related to the IAC but the other symptoms lean more toward a failing fuel pump. Check the fuel pressure. Before replacing the iac, take it off and clean the carbon out of all the ports in the iac and where it attaches. A 9v. battery will make the iac go in or out a bit each time you touch the contacts. ************************************* Switching ign on but engine not running produces fuel pressure right on specs, until after 1 - 2 seconds when the pump kicks off the pressure drops sharply