92 Ford F-150 Flareside engine problems
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92 Ford F-150 Flareside engine problems
I have a 1992 Ford F-150 Flareside. It started missing and smoking the other day.I took out all the plugs and put in new ones. It looked like one was bad.This did not help. I bought new plug wires, cap and rotor and changed them. This didn't help either.It seems to keep filing out one plug. It appears to miss the worst at low RPM'S.When i press on the gas to go faster when it is missing and sputtering, it starts smoking pretty bad.The check engine light comes on but does not stay on, it just blinks on and off every so often.Does anyone know of anthing else that could be causing this? Thanks for your help!!!
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From: Florida
Make sure you've got your 7 and 8 wires routed correctly...wish i had a schematic....if you don't they'll cause it to miss but that probly wouldn't explain the smoking.Have you changed your PCV valve?it's on the passenger side valve cover on the end closest to the firewall and it can be tricky to get to.Luck
JR
JR
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What color smoke is coming out the tailpipe? Also do a scan for codes. Use this to help. http://www.fordfuelinjection.com/?p=13
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Originally Posted by flareside_thunder
Make sure you've got your 7 and 8 wires routed correctly...wish i had a schematic....if you don't they'll cause it to miss but that probly wouldn't explain the smoking.Have you changed your PCV valve?it's on the passenger side valve cover on the end closest to the firewall and it can be tricky to get to.Luck
JR
JR
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From: Orangeville, Ontario
Unfortunately it sounds like your number eight cylinder is done for. The PCV dumps pretty much whatever it re-circulates directly into that cylinder and causes issues. Do a compression test to find out 100%.
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How are you doing this compression test? All plugs removed, do not give it gas. Testing one cylinder at a time letting the piston hit on the compression stroke 3 or 4 times to build compression. Record the value for each cylinder.
On the cylinder with the low reading, put in 3-4 tablespoons full of new, clean oil in the plug hole. Run the test again, if the compression comes way up it's likely to just be really bad rings. If the compression doesn't come up at all, or it only comes up very little then you have a severe mechanical failure.
On the cylinder with the low reading, put in 3-4 tablespoons full of new, clean oil in the plug hole. Run the test again, if the compression comes way up it's likely to just be really bad rings. If the compression doesn't come up at all, or it only comes up very little then you have a severe mechanical failure.
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Did a scan for codes , but don't think the codes have anything to do with bad cylinder. Codes are 636-transmission oil temp. higher or lower than expected. 114-Air charge temperature sensor higher or lower than expected voltage. 327-EGR closed valve voltage lower than expected. 332-Insufficient EGR flow detected. And the last one was 334-EGR closed valve voltage high. Thanks for your help.
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To me it sounds like it valve seal has gone bad and it seaping into the exhaust port of your head and coating your plug. Thus the blue smoke coming out your tailpipe. Hope this helps, I had an 87 Cougar that did this
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From: Sand Lake, MI
Originally Posted by ford150man
I'm no mechanic. Does this mean the motor is junk? Does this mean the cylinder isn't bad? Thanks for you help.