90 b18b sputtering

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90b18bDX

New Member
I have a 90 dx with a b18b swap in it. When the car is cold it runs fine, when it gets up to temperature it sputters between 2 1/2 - 3 1/2k. Any ideas as to what it could be?
 
now after a little bit I'll get a check engine light and it won't go past 3.5 grand, if I turn the car off then back on the check engine goes away for a little while.
 
sounds like a sensor in the dizzy. you sure you have the right dizzy on there? has it always done that since it was swapped? or is it just starting to do that?
 
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