dead cyl.
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Joined: Jan 2004
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From: st. cloud,mn
dead cyl.
ok i have a 1997 f150 4.2l, i posted a few times about the problem that developed right after i changed plugs and wires, it just ran like crap and had no power, well after a while of lookin at what i could do i took it in, now i saw shortly after i changed plugs #5 burnt off part of the plug, and the scanner said 4 and 6 had a miss, plus lean problems, so i took it in mech. figured vacume problems, cleaned inj. and he did some stuff with the egr valves, slapped it all back together to find out now #5 is completely dead no compression!!! so where do i go from here, is it the piston, valves?? any suggestions! it will be spendy i know prolly gonna have to pull the head!
tom
1997 f150
5 spd. manual
flareside
tom
1997 f150
5 spd. manual
flareside
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Joined: Jan 2004
Posts: 5
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From: inuvik
Just removed the heads on my 4.2 because of no compression on one cylinder. The exhaust valve had a hole burned in it. You need to replace the head(s), the O2 sensors and the injector on that cylinder.
It's not such a bad thing except for the $$$ because you get new intake gaskets and a more reliable engine afterwards.
It's not such a bad thing except for the $$$ because you get new intake gaskets and a more reliable engine afterwards.
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tom_moss
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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Jan 4, 2001 05:11 AM
