[Shotimes] High end ignition loss

[clubairth@bellsouth.net]

Zach:
 Make sure your not losing 12 VDC. If the motor mounts allow the engine to
twist too much, at higher RPM's you can place a strain on the alternator
wires. Over time this can cause a intermittent loss of 12 VDC. Also check
the alternator plug for corrosion and see if it's broken in any way.
.
.



> Ok, so I have a high end ignition loss, that I have not taken the time to
> pull the codes on yet. Any takers on guessing the problem? Here are the
> symptoms:
>  Runs fine below 4000 rpm at any throttle position. Runs ok above 400rpm
at
> part throttle. Over 4000 rpm with high load/lot of throttle and I get
> intermittent loss of all ignition. I'm not talking a cylinder or two, I'm
> talking all ignition. Feels like your idiot buddy reached over and started
> flipping the key on and off.
>  Fuel pressure remains constant as ignition fails, seems to me not to be
an
> fuel related problem. Also WB does not show a significant spike on mixture
> either way.
>  Before you say it, it has new taylor wires and new motorcraft plugs as of
> shortly before the convention. Also got the plug wells resealed then
too....
> for the umpteenth time :) (I just reseal them about once every 2 years or
> the next time I have the valve covers off whchever comes first)
>  There is a CEL and I need to pull the codes, just have not done it yet.
> Problem arose on Saturday after about 300 miles of driving, mostly on the
> highway with only a few bursts up to the top of 3rd to get around some
> folks. Came out of the booth on the toll road and jumped on it in second
> gear to get into the lane I needed and it felt like someone just started
> momentarily turning off the ignition.
>  So guesses, i may pull the codes at lunchtime if it stops raining.
>  Z
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