JB4 HKS sparkplugs pre detonating/ Misfire?

[Maxdelacruzz]

Ive been having this issue with a stutter and ugly pops with my engine im not sure how to resolve. this is my third set of HKS spark plugs and after about 2k miles they have a cracked and look all black.
im using map 4 with e30 measurements to the dot.
list of mods
-------------
AEM intakes
ARK down pipes
muffler delete
JB4 (E30 mix with 91)
located in SoCal so i cant mix with 93

 

[General_Vodka]

Ive been having this issue with a stutter and ugly pops with my engine im not sure how to resolve. this is my third set of HKS spark plugs and after about 2k miles they have a cracked and look all black.
im using map 4 with e30 measurements to the dot.
list of mods
-------------
AEM intakes
ARK down pipes
muffler delete
JB4 (E30 mix with 91)
located in SoCal so i cant mix with 93

What you gap your plugs at? Also have you tried contacting BMS? HKS should not go bad after 2k miles, I'm over 15k on mine. You could be running too lean or too rich. Is the issue with all the plugs?

 

[bfglitch]

Also, there's another thread here regarding cracked plugs causing issues with the coil/boot, which not only requires a replacement of the plug, but also the coil/boot, otherwise if you're just replacing the plug, the coil/boot will damage the next plug.

 

[Maxdelacruzz]

What you gap your plugs at? Also have you tried contacting BMS? HKS should not go bad after 2k miles, I'm over 15k on mine. You could be running too lean or too rich. Is the issue with all the plugs?

Im running stock gap for the HKS and it ran perfect no issues on my first tank of E30 but on my second fill it began doing the same issue if i run stock map or maybe map 1 it doesnt do anything out of normal behavior. but as soon as i run map 2,3,4 thats where the issue begins

 

[Maxdelacruzz]

Also, there's another thread here regarding cracked plugs causing issues with the coil/boot, which not only requires a replacement of the plug, but also the coil/boot, otherwise if you're just replacing the plug, the coil/boot will damage the next plug.

at this point i wouldnt doubt that the coil got damaged i havent even hit 1k miles on these sparks

 

[ChaneRZ]

Well there you go because of the stock gap.

 

[General_Vodka]

Im running stock gap for the HKS and it ran perfect no issues on my first tank of E30 but on my second fill it began doing the same issue if i run stock map or maybe map 1 it doesnt do anything out of normal behavior. but as soon as i run map 2,3,4 thats where the issue begins

Lol bro stock gap = no no. Jb4 needs a much smaller gap than stock

 

[cncBilly]

Im running stock gap for the HKS and it ran perfect no issues on my first tank of E30 but on my second fill it began doing the same issue if i run stock map or maybe map 1 it doesnt do anything out of normal behavior. but as soon as i run map 2,3,4 thats where the issue begins

Self inflicted issue.

 

[Maxdelacruzz]

whats the recommended gap?

 

[General_Vodka]

whats the recommended gap?

For JB4? .22ish

 

[SuicideSaints]

Gap is probably the original problem and then it may have damaged the coil if they keep cracking. Densos are .022 and HKS are .022-.024 depending on who you ask. Stock gap will not work on any plugs for a tuned car.

 

[Maxdelacruzz]

Ok cool I appreciate the advice!!