.024 is too small a gap. The car will not run properly. I would check the coil and spark plug wires. You should be able to open the gap wider than factory specs to get a little more power, not make it smaller.

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1990 190E 2.6
1996 Grand Voyager 3.3
1985 Mustang GT 5.0 5 SPD
1982 Suzuki GS 750T