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My guess is the ground wire on the boost/pressure sensor isn't grounding right. That's the cause on the 86's which was supposedly fixed in 87+. However, they fixed it by adding another ground. If that ground has gone bad after (in your case) 20 years, that could cause a stumble.
I had the stumble from ~3600rpm to redline and regrounding fixed it.
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1986 Sport: 132k miles, 5A (Sapphire Blue Metallic), Tokico Blues, Racing Beat Springs, Custom LED tailights (only S4 LED tails in the world), SSR Mark II, Racing Beat exhaust, S5 black interior, Rotary Resurrection rebuild at 120k miles
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08-07-2008, 12:54 PM
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