EdgeAWD Posted December 2, 2025 Report Share Posted December 2, 2025 (edited) 0m Edited December 14, 2025 by EdgeAWD Quote Link to comment Share on other sites More sharing options...
EdgeAWD Posted December 2, 2025 Author Report Share Posted December 2, 2025 new throttle body gasket, not maf Quote Link to comment Share on other sites More sharing options...
EdgeAWD Posted December 5, 2025 Author Report Share Posted December 5, 2025 (edited) m Edited December 14, 2025 by EdgeAWD Quote Link to comment Share on other sites More sharing options...
EdgeAWD Posted December 5, 2025 Author Report Share Posted December 5, 2025 Also, there is no detectable hissing noises. Have seen some people using carb cleaner, seems random. There is not much room to do anything on the right side of the motor. Quote Link to comment Share on other sites More sharing options...
1004ron Posted December 5, 2025 Report Share Posted December 5, 2025 What are you using to read codes? Quote Link to comment Share on other sites More sharing options...
1004ron Posted December 9, 2025 Report Share Posted December 9, 2025 The only scanning device I have full confidence in, is Forscan and Forscan Lite. I cheap OBDII dongle and the free Forscan Lite is the most cost effective option. Quote Link to comment Share on other sites More sharing options...
1004ron Posted December 13, 2025 Report Share Posted December 13, 2025 @EdgeAWD please add your year & model to your profile signature - https://www.fordedgeforum.com/settings/signature/ Quote Link to comment Share on other sites More sharing options...
EdgeAWD Posted Sunday at 06:34 PM Author Report Share Posted Sunday at 06:34 PM In summery Edge 3.5 has rough idle which is now always present including cold and 40 plus degrees. The idle gets to the point where it is stumbling, almost stalling in a parking lot. It is doing this frequently. This makes it very unpleasant to drive. It has none of these symptoms on the hwy. Posted before, have been through a laundry list of tune up items. Scanning 2x at a car service place there is no codes driving on short loops. 2 different places. The vacuum is 16.5 at idle, so far one person said that is not as important as it being steady. It is very steady. Still do not know if it should be at 18 plus at 900ft, no one replied. I do not currently have a way to do an extensive vac test but that may be a waste of time if it is at 16.5. Has anyone had a bad throttle body that caused stumbling, irratic, rough idle with drive ability problems in parking lots? It seems to have an internal tps. There was a recall on f150s for something. Is the only way to check that other than throwing parts at it with an oscilloscope? If so that seemed like a very involved test procedure. I do not know where to go with this. It had one 457 gas cap code, that was likely the gas cap itself. It has not happened in 100 miles since then. Quote Link to comment Share on other sites More sharing options...
1004ron Posted Sunday at 10:11 PM Report Share Posted Sunday at 10:11 PM (edited) I would start by scanning it with FORScan or FORScan Lite. Edit: Same topic threads merged - not good practice to create multiple same topic threads. Edited Sunday at 10:13 PM by 1004ron Quote Link to comment Share on other sites More sharing options...
1004ron Posted Sunday at 10:14 PM Report Share Posted Sunday at 10:14 PM On 12/13/2025 at 3:24 PM, EdgeAWD said: m What's this about? Quote Link to comment Share on other sites More sharing options...
fishx65 Posted Sunday at 11:48 PM Report Share Posted Sunday at 11:48 PM Have you replaced the Purge valve? My 2011 3.5 had idle issues and the 1st thing I did was replace the purge valve which fixed the issue. Quote Link to comment Share on other sites More sharing options...
EdgeAWD Posted yesterday at 07:29 AM Author Report Share Posted yesterday at 07:29 AM Deleted some of the post, was not relevant. Took it off, sucked on it, it did not seem to allow air through. Someone did a test on one with a vacuum pump, seemed to have a different result from sucking on it. I do not know if the suction you can create is enough to get an accurate test? I have suspected the valve the entire time though fordtechmackloco seemed to think the valve that mounts on the firewall is more reliable than a later model. It has not been replaced. Does yours mount on the firewall? How bad was your idle? Did you have any codes or symptoms? Did you attempt to do some kind of vacuum test on it before replacing it? I have heard of these causing issues. Do not know how bad. Also do not know if the p457 can be loosely associated with this problem. Someone mentioned the gas cap then looking at a chain of things in the evap, seems very complicated if getting into that. Possible the gas cap was just loose. Has anyone had a bad maf with no codes? It is very clean. Quote Link to comment Share on other sites More sharing options...
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