mac2

changed my plugs (pfr6b)and panel filter(standard) yesterday to a green panel filter and ngk pfr7b plugs and now my car is hesitating in all gears anyone any ideas what could of caused it, cars a my94 uk.

mac2

computer says no :

scuba_doo

change panel filter back then test and if still there change the plugs back .
you'll know which has caused it then .

mac2

i will have a look tomorrow because i dont want to drive it as it is,cant see that the filter has caused the prob but i will have a look might be ive been to heavy handed with something or not put plugs in right but they seemed to go in quite easily.

scuba_doo

Is the heat range of the plug correct and plugs gaps checked before putting in as if it was ok before these two changes were made , it's one or the other as the cause .

mac2

new plugs ngk pfr7b checked gap 0.7

just checked the gap on the plugs removed and they are ngk pfr6b 0.6 one had hardly no gap in it but ive prob banged it without realising and closed the gap.

i got the 7b,s after reading they are a good choice for a slightly modded car mines slightly modded about 260 i think so i thought they would of been fine.

scuba_doo

Have you tried the first set of plugs back in yet , you may have a dicky plug .

holdup

could be the coil packs i changed my plugs not long ago and screwed the coil packs . had the same thing hesitation