cylinder 1 misifre help
 

i replaced the coil/plugs/wires has new cap/rotor on it...

the plug still won't spark
what can be wrong wuith it and how can i get it to spark?

Vehicle info? Considering this section could be discussing anything from an old points style distributor to the new EDI system, it really is important... Gets old asking though. :icon_doh:

sorry, my friends 2000 blazer 4.3 4x4

What brand were the 'new' parts you installed?

i got them from advancedauto,
not 100% sure on the brand, the cap/rotor are new and on there previously. although i took them apart and cleaned the minor grim off the connection

i used old/new plugs to check cylinder 1 plug and it still wouldn't fire so i doubt it;s the plug/wire portion..
maybe cap/rotor?

These trucks really run best with delco.

Many people have chased misfire problems only to find the 'new' aftermarket parts from the chain stores were faulty out of the box.

One thing you can try is to mist down the wires at night with the engine running, truck located in a dark place with all lights turned off.

what i did was disconnect the wire from the plug, installed a new wire/new plug on that wire and fired it without it installed and no spark no matter what i did to cylinder 1..

do you think it could be faulty cap/rotor? wouldn't it cause more then 1 cylinder misfire?


b asically i am out of options i replaced nearly everything that would cause a misfire and can't get the plug itself to fire.. it's not a dead cylinder.. it's getting good gas/compression..

just no spark on that 1 and i replaced everything (besides what was new) that would cause a misfire..

what faulty part would cause this?

Cap/Rotor??? Maybe there is an internal fault in the cap. You won't know for sure until you replace it yourself.

Are you sure that the #1 wire is fully seated in the cap?

Wouldnt it be funny if he looked at # 2 or 4 and it was firing twice!

https://blazerforum.com/forum/attach...iringorder-jpg