GT40 part throttle surge

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   You have to t5he same way to test if it was off a Ford truck with the windsor motor and fuel injection. Do you have Perfect Pass on your boat?

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nms1991 Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: May-31-2004 Location: United States Status: Offline Points: 46	Post Options Post Reply Quote nms1991 Report Post Thanks(0) Quote Reply Topic: GT40 part throttle surge Posted: June-12-2005 at 11:05pm
	You have to t5he same way to test if it was off a Ford truck with the windsor motor and fuel injection. Do you have Perfect Pass on your boat?

Chris Members Profile Send Private Message Find Members Posts Add to Buddy List Guest	Post Options Post Reply Quote Chris Thanks(0) Quote Reply Posted: June-12-2005 at 2:27am
	The GT40 engine on my 96 SN has a problem I can't seem to nail down. It idles fine and runs great at WOT but from 1200 to 1800 rpm the engine surges and the rpms fluctuate by about 200-300. I've ruled out vacuum leak and misfire. I was wondering if thats an IAC motor bolted to the side of the throttle body and if so could the Intake Air Control motor could be causing this or perhaps a bad fuel pressure regulator? Is there any way to test the IAC motor? I have'nt checked fuel pressure readings because it runs fine at WOT and seems more like an airflow problem. Any ideas would be appreciated.

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