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Automotive Repair Car Troubleshooting Topics   Car Troubleshooting   Engine Troubleshooting   Engine Fault Codes   Electrical and Wiring   Transmission Problems Car Repair Topics   Car Making Noises   Car Stereo Repair   Heating or AC Issues   Motorcycles and ATVs   Tricks of the Trade   Truck Repair Advice Site Options:      Login   Sign up here! Latest Forum Post   2011 Dodge Nitro OBD scanner seems to drain battery in 10-20 minutes When I bought this car in summer 2023, a... Grounding Cable, 2017 Jeep Renegade Trailhawk The Cable that connects my negative batt... Rough Idle (Found new thing) Hi everyone. First of all sorry for bad ...     equipment hey yall. im a first year engineering st...   HELP I have a 1956 1/2 ton panel truck, 69 35...   Howdy     Just wanted to s...   ABS/Tractiob/Brake Lights on But No DTCs Hello all, Recently while driving m...   Chevy strut replacement I'm trying to get a sensor of some kind ...   2020 suburban new transmission and issues after install recently had the transmission fail at 11...   Caliper piston post cleaning won't screw in Hello, 2013 Hyundai Elantra limited (ma...

Search Auto Parts Search F 150 idel issues Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Engine Troubleshooting taderchip New User Apr 26, 2014, 8:29 AM Post #1 of 7 (1132 views) F 150 idel issues Sign In 86 f150 EFI starts up and runs for 5 mins and starts having idle issues and dies then hard starting Tom Greenleaf Ultimate Carjunky / Moderator Apr 26, 2014, 8:53 AM Post #2 of 7 (1122 views) Re: F 150 idel issues Sign In Which engine? The 300 six (4.9L) was known for stretching head bolts that were early for "turn to torque" and might be just right when cold then not when warm and screwed up like a bad head gasket then show nothing wrong when/if checked cold. There's about 1,000 other reasons too so some checking is in order of what and why it does that. Those head bolts BTW would have been done by now so unlikely that and the 5.0 V8 didn't do that, T Discretesignals Ultimate Carjunky / Moderator Apr 26, 2014, 9:20 AM Post #3 of 7 (1115 views) Re: F 150 idel issues Sign In What is the fuel pressure at when the engine stalls or doesn't want to start? Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved. taderchip New User Apr 26, 2014, 9:38 AM Post #4 of 7 (1113 views) Re: F 150 idel issues Sign In I'm sorry . its a302 taderchip New User Apr 26, 2014, 9:45 AM Post #5 of 7 (1106 views) Re: F 150 idel issues Sign In I don't have a pressure tester at this time . but it is now idling high Tom Greenleaf Ultimate Carjunky / Moderator Apr 26, 2014, 9:47 AM Post #6 of 7 (1105 views) Re: F 150 idel issues Sign In OK: Let the testing begin. IMO these engines didn't have super common issues mechanically so get the fuel pressure or any test observations WHILE it does this so be ready for quick testing. 1. Fuel pressure as just mentioned. 2. May want to check lash on timing chain if not known done already it's late. Just watch distributor rotor while turning engine by crank bolt back and forth and if you can still see timing marks you can see how much lash in degrees. 3. Vacuum leaks anywhere as when cold it's running richer and could be covering those or just the wrong one. Start checking and ruling things out. Most of these engines didn't just up and croak for no reason, T Hammer Time Ultimate Carjunky / Moderator Apr 26, 2014, 9:53 AM Post #7 of 7 (1099 views) Re: F 150 idel issues Sign In You probably want to test fuel pressure and volume after the issue have started. I believe this one uses 2 fuel pumps even though you never gave us an engine size., one supply pump inside the tank and one high pressure pump on the frame rail. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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