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Pickups Ford F-Series Ford F-Series Gasoline Engine Problems
163 messages, Last post on Oct 15, 2009 at 9:39 PM
You are in the Ford F-Series Forum. Your Host is kcram
| i changed my sparkplugs at 80k miles.2monthes later #5 coilpack went out,replaced with oem.2weeks later #6coilpack goes out,replaced all 8coilpacks with accel coilpacks.2months later #5 accel goes out.swaped #5coilpack and sparkplug with #7coilpack.rescanned #7misfire.i'm currently waiting on a replacement from accel.i know my truck has the redesigned heads.so i don't think its a sparkplug issue. has anyone else had this problem, i can't find any info on this. Could this be a computer problem. Something is either frying the #5 COILPACK or i got a faulty coilpack from accel. frustrated and confused, please help w/any info. | |
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Mechanic says computer shows no trouble codes. He cannot find anything wrong. Engine clatters under load. Worse at higher rpm's. I have bought gas at different places and it does not change. Anybody else had this problem??
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Replying to: pgr351 (Apr 18, 2009 9:14 pm) |
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| Replaced plugs, wires, cap, rotor, air filter, oxygen sensor, and PCV valve. Engine idles rough. Smokes black on both banks. Plugs were covered with black soot. | |
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Replying to: mickeymouse2 (Dec 12, 2007 3:34 pm) |
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my 91 f-150 has developed a miss. It only starts missing after it has been running a while(15 or 20min). It doesn't do it when the engine is cold or when the engine it a idle speed. It only misses when you press the gas.I have changed fuel filter, distributor cap, rotor, coil. The plugs and wires have about 4000 miles on them. It doesnt do it all the time. The truck went dead the other day and would not start up. I let it sit for 3 or 4 min and it fired right back up. I hope it isn't the fuel pump. Can anyone help me?
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Replying to: mike4578 (May 02, 2009 6:32 pm)
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Replying to: mike9408 (May 03, 2009 6:11 am)
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Replying to: mike4578 (May 03, 2009 8:01 am) I had the same type of problem on my 4.9L. It kept quiting on me and missing. I found that it wasn't getting a good connection (electrical) at the tank. It kept burning the connector and pigtail. After burning a couple of pig tails, I finally put Kearney's on the connector posts. It stopped the problem at the tank but I also found that the wires going to the collision switch (driver side firewall under dash) were corroded, thus not sending adequate power to the pump. I renewed the connection and haven't had any problems since. (This problem haunted me for about a year). I suggest that you pick up a Haynes manual #36058 if you don't already have one. The fuel system is in Chapter 4. It has good trouble shooting and test procedures. Mike 9408 |
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Replying to: kcram (Jul 18, 2006 7:56 pm) |
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