Backfiring And Rough Idle

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05-22-2004, 09:28 PM

glortiz_99

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Join Date: Jan 2004

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i have a 13b 4port engine REPU and it is idling rough and back fires when i start taking off. I also cant get the secondarys to open, What do i do?

05-23-2004, 12:52 AM

Jeff20B

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Join Date: Nov 2001

Posts: 2,284

Does it have a points distibutor? Or has it been swapped for an '81-'85 electronic distributor from an RX-7? What kind of carb? Thermal reactor or header? In other words, how stock is it?

05-23-2004, 11:12 PM

glortiz_99

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We swap the distributer to a electronic one and it has headers. I think the carburator is from a 1st gen rx-7 but am not sure.. heres a 2 pix of the engine

05-23-2004, 11:14 PM

glortiz_99

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heres the second

05-24-2004, 01:56 AM

Jeff20B

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Well, it IS a 12A carb. I can see the stud offset and the four-screw secondary spring cover. Perhaps the carb is your problem?

Check this out. Some guy is selling a bunch of 13B carbs. He didn't answer my latest email to him, so I don't know what's going on, but here is the link. http://www.mazdarepu.com/board/viewthread....?FID=6&TID=1035