98 Mazda B4000 5spd will hesitate / stumble on light load

If you shift up to the next gear too soon or slow down in a gear then
try to accelerate....the truck seems to cough / hesitate / buck until
you ease off the gas or the speed picks up .. my MAF ?

Have 129K and already changed the fuel filter and added injector
cleaners

Thanks in advance.

Phil

<ndccpf1.RemoveThis@gmail.com> wrote in message
news:1160302645.214600.73350@i3g2000cwc.googlegroups.com...
> If you shift up to the next gear too soon or slow down in a gear then
> try to accelerate....the truck seems to cough / hesitate / buck until
> you ease off the gas or the speed picks up .. my MAF ?
>
> Have 129K and already changed the fuel filter and added injector
> cleaners
>
> Thanks in advance.
>
> Phil
>

It's the plug wires. It could possibly be another ignition component, but
the wires are the best place to start. What's happening is that high
cylinder pressures during "lugging" make just a little more electrical
resistance in the spark gap, and your wires start leaking electricity.