Missing Under Load. Maybe need new plugs. What Kind? - Saab Performance Bulletin Board - Saabnet.com
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I have an 89' SPG with spg 9 exhaust, spg9 stage II apc box, high pressure bosch hooter valve and k&N intake. It started to feel like it was missing everytime when the turbo gauge got close to the red. So replaced cap, rotor, wires, and plugs and it still feels like it misses under load. The most is when driving on the highway and anytime the turbo reaches half way in the red on the guage. I've red some other posting similar to this and people say to put new, or better plugs in. If it's not the plugs what could the problem be? If I need new plugs what kind would you suggest for best performance? Thanks.
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