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Discussion Starter #1
I have a swapped D15B in a 91 EF and it recently started to stutter when it runs under about 1500-1000rpm after putting coolant.I changed the spark plugs, a new pully and alternator belt, and changed the oil. what can be the problem?
 

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91 CRX Si
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This may sound odd but did you change out the thermostat? Ive heard of bad thermos causing engines to sputter.
 

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Discussion Starter #3
i just checked the oil and it was almost out! I'm putting more oil and going to check the thermostat and going to update on how it goes
 
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