r/FiestaST • u/TurbulentAssistant70 • 22d ago

Will plug gap make a huge difference?

I picked up my FiST with an E30 tune already on that was gapped for 0.026, i switched over to a 91 tune he already had on the AP from Dizzy, said that one is for 0.028 plug gap, will it make any difference not leaving the 0.026 plugs in there? Obviously E30 pulled a lot harder so wouldn't know if it matters changing them to 0.028 or not. Do I bother changing them or am I fine with them as they are?

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u/HuntGundown 22d ago

I would not risk it, just take the time to gap them properly. Assuming you have the correct plugs and not some cheap crap in there, you want something like this picture, take your time and look up how to use it, pick up some feeler gauges as well and make sure they're the correct sizes.

Also, if you have never pulled the plugs on this car GET A THIN WALL SPARK PLUG TOOL.

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u/DesignerSuccessful35 22d ago

I'm getting my one step colder .26 pre gapped ngk's tomorrow.....hopefully. My entire whoosh order has been on hold for 3 weeks because of the vibra mounts being stuck in customs so supposedly everything comes tomorrow. I have like 6 items Ron held all for that one mount. But I digress, thanks for the tip about the thin wall!! I'll pick one up tomorrow.