Missing under acceleration (only when hot)
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Junior User
Joined: Jan 2003
Posts: 99
Likes: 0
Missing under acceleration (only when hot)
My 92 351 misses severely under hard aceleration but only when up to operating temperature.
Runs fine when cold but gets progressively worse as it warms up.
It cuts out only under hard acceleration similar to if a couple cylinders were not firing.
Anyone have experience with this type of engine miss?
Thanks
Runs fine when cold but gets progressively worse as it warms up.
It cuts out only under hard acceleration similar to if a couple cylinders were not firing.
Anyone have experience with this type of engine miss?
Thanks
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Sounds like an ignition problem, could be TFI related if your plugs, wires, and coil are fairly new and the wires are properly routed. The TFI modules are known for heat related problems.
Fleet Mechanic
Joined: Mar 2005
Posts: 1,603
Likes: 1
From: St Louis
It is assuming you used the motorcraft or equivalent copper core spark plugs. Dont use bosch in these particular engines because they increase ping and miss when the engine is hot. I would also check to make sure you do not have a cracked distributor cap, as this will cause the timing to be off for a particluar cylinder.
