number 2 randum missfire on 1988 blazer

[trypodd]

i have replaced almost everything i can think of yet the number two cylinder
keeps missing spuraticly ive replaced the cap and rotor the plugs & wires, and
the coil which helped a little. i also did the timing and reset the ecm it still is missing im trying to figure out if its a ecm problum or if my distrubuter is going bad. need help pleas!

[maxwedge]

How have you pinned it down to #2?

[Jeremy Fitch]

plugs, wires, dist cap, rotor button, coil? all been checked or replaced?

[trypodd]

Originally Posted by maxwedge

How have you pinned it down to #2?

i took my timing light and put the pickup leed on each plug wire the number
two plug only lightes the gun in spurtes. and yes i have changed cap roter wires plugs coil and ecm to date the ecm helped but it is still missing at least two out of every ten fires.

[Mr. Smith]

Originally Posted by trypodd

i took my timing light and put the pickup leed on each plug wire the number
two plug only lightes the gun in spurtes. and yes i have changed cap roter wires plugs coil and ecm to date the ecm helped but it is still missing at least two out of every ten fires.

If you have bosch plugs in it swap that plug out with a known good plug and see if the problem goes to the cylinder you swaped it too. Bosch plugs are crap and I discourage their use. AC or Champion get the nod..YMMV