GreenMachine5.0

My car has a random miss that is detectable while cruising but is very noticable and power robbing near redline only when i get on the gas hard. Also my tach jumps around while the RPM is climbing when shes floored. Any ideas?
Bosch platinmum plugs, Bosch cap and rotor, MSD wires all under 10 000 miles. Just changed my crank trigger sensor in the dizzy (problems seem to have started after this, timing is good btw)
One more question. Where does the tach get its signal from, i would like to check signals and wiring.

Thanks in advance

bobby

switch to motorcraft plugs and clean your MAF ( mass airflow meter )

95_302_StangMan

Alot of people HATE Bosch Plugs.. I dunno what there problem is but my car does almost the same thing kinda jerks/misses while at constant rpm's.

86gt5.0HO

Fuel Filter

GreenMachine5.0

cleaned my MAF, seems to be smoother at cruising but still misses like crazy near redline at WOT.
Where does the tach output come from.
thanks

hawaii5.0

I had a problem like that. it turned out to be the act sensor(air charge temp) located on the lower intake. when i changed mine the original looked like garbage and when i tested it with my multimeter it gave no resistance.

hawaii5.0

actually it isnt fixed. still have a miss too. only slight at low rpms but ridiculous above 4000rpm. i will continue working on it tomorrow.