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Search Auto Parts Search 1990 Ford F-250 351W, NO timing Advance Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Engine Troubleshooting VinniD Novice Feb 8, 2017, 4:27 PM Post #1 of 4 (2547 views) 1990 Ford F-250 351W, NO timing Advance Sign In Ford, 1990, F-250HD, 4X4, EFI, XLT Lariat, 82,000 miles on it. A couple of months ago I noticed it loosing power. I could still get up to speed but just took longer. A couple weeks ago it would hit 1500RPM and start to surge and sputter. I had a Old Jacobs Electronic Mileage Master on it and went back to a stock coil. Replaced the Rotor, Cap, Spark plug Wires and new Spark Plugs (Original Plugs). Now, it can get to 2500RPM but that's it. I checked the timing and set it to 10BTDC (was at 7BTDC) per manual. Noticed the after reconnecting the Spout plug, the timing is sitting at 20 Degrees BTDC at idle. I reved the engine and notice the the timing stays at 20BTDC at all RPM. So, What tells the distributor to Advance the timing? ICM? ECM? I'm well versed in distributors with mechanical advance but not electric advance. Thanks in Advance, VinniD (This post was edited by VinniD on Feb 8, 2017, 4:35 PM) Hammer Time Ultimate Carjunky / Moderator Feb 8, 2017, 7:25 PM Post #2 of 4 (2529 views) Re: 1990 Ford F-250 351W, NO timing Advance Sign In Quote So, What tells the distributor to Advance the timing? Nothing. The distributor doesn't do the advancing. The computer does. Removing the spout connector takes the computer out of the loop. I wouldn't be concerned with the timing. I would checked for restricted exhaust. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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. VinniD Novice Feb 9, 2017, 1:32 PM Post #3 of 4 (2501 views) Re: 1990 Ford F-250 351W, NO timing Advance Sign In OK, extremely skeptical about the "I would checked for restricted exhaust." However with nothing to lose I separated the CAT from the two down pipes from the engine and fired it up. OMG that was it, right to 5,000 RPM no problem. took it for a short spin and it felt brand new again. Haven't had this much power in years. I bow to your knowledge oh wise one, You Nailed it.......... Thanks Greatly, VinniD (This post was edited by Hammer Time on Feb 9, 2017, 1:34 PM) Hammer Time Ultimate Carjunky / Moderator Feb 9, 2017, 1:35 PM Post #4 of 4 (2493 views) Re: 1990 Ford F-250 351W, NO timing Advance Sign In Glad you got in resolved. In the future, please don't change the title to the thread. I changed it back. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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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