Hanging Idle with Vortech ... I think I'm close
Let me just say I have been a Mustang owner for just a short time but I have found TONS of good information on this site and it seems to have a great community. My past projects have been Jeeps with similar guys willing to help each other out.
So the issue................ hanging idle. Warm or cold, clutch in while in gear or just rev the engine and it hangs at 1500 - 1700 for about 3-5 seconds and then drops down to about 950.
I've done as much research as I think I can do on the topic and see all kinds of fixes. TPS, IAC, Vaccume leaks, kinked throttle linkage. It idles well at 950 with no surges and the TPS is at .916 volts. I did the idle reset process just in case there was something there....
Here is why I think I'm close and would like to know if anyone has any suggestions. When I disconnect the IAC it operates perfectly. It won't stay running if disconnected and I try to start the car from cold, but if it warms up and then I unplug the wires to the IAC, it drops right to 800-900 everytime. The engine has about 2000 miles since a complete rebuild and the IAC valve and motor look brand new. I have taken them off and sprayed the valve with injector cleaner and it looks really clean. The gasket is new as well. The wires also have plenty of slack.
Besides running out and dropping the cash on a new IAC and/or IAC motor right away (because I just hate throwing parts at something without ruling out the problem) are there any suggestions as to ways I can confirm what is wrong?
Current Induction:
UPR Boostmaster pipe
Vortech V2 - Set for 8lbs
70mm BBK Throttle Body
GT40 Upper/Lower Intakes
Thanks so much for any suggestions as the nice weather is FINALLY starting to show itself in New England and I really want to resolve this issue.
K
Let me just say I have been a Mustang owner for just a short time but I have found TONS of good information on this site and it seems to have a great community. My past projects have been Jeeps with similar guys willing to help each other out.
So the issue................ hanging idle. Warm or cold, clutch in while in gear or just rev the engine and it hangs at 1500 - 1700 for about 3-5 seconds and then drops down to about 950.
I've done as much research as I think I can do on the topic and see all kinds of fixes. TPS, IAC, Vaccume leaks, kinked throttle linkage. It idles well at 950 with no surges and the TPS is at .916 volts. I did the idle reset process just in case there was something there....
Here is why I think I'm close and would like to know if anyone has any suggestions. When I disconnect the IAC it operates perfectly. It won't stay running if disconnected and I try to start the car from cold, but if it warms up and then I unplug the wires to the IAC, it drops right to 800-900 everytime. The engine has about 2000 miles since a complete rebuild and the IAC valve and motor look brand new. I have taken them off and sprayed the valve with injector cleaner and it looks really clean. The gasket is new as well. The wires also have plenty of slack.
Besides running out and dropping the cash on a new IAC and/or IAC motor right away (because I just hate throwing parts at something without ruling out the problem) are there any suggestions as to ways I can confirm what is wrong?
Current Induction:
UPR Boostmaster pipe
Vortech V2 - Set for 8lbs
70mm BBK Throttle Body
GT40 Upper/Lower Intakes
Thanks so much for any suggestions as the nice weather is FINALLY starting to show itself in New England and I really want to resolve this issue.
K