Sounds like plugged up pre cats, my NA had the same problem I got a Racing Beat header that eliminated the pre cats and it went away. I've also seen them on eBay for cheaper. Either way you can't lose the stock header is like a cast iron stove attached to the engine it's heavy and massive.
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It needs a scanner on it to find the problem while driving it. Several things can cause this. At 4000 rpm's in park the ecm will suppress the engine. this would be the Neutral safety switch. So going from there, if not the switch, it could be wiring or a bad buffer in the ecm.
I have a 1997 626 2.0L 5speed when im driven it like rev limits cuts out around 3500-4000rpm, and when i rev it up and past 4000rpm it stalls, anyone have a idea whats wrong??? thanks i just replaced the crank sensor and egr and still. good power put cuts out
my 1988 mazda 626 starts okay then dies everytime it idles down to normal idle speed. i replaced the throttle control sensor and the mass air sensor. i replaced the rotor in the distributor but is still dies. if you throttle up to about 1500 rpm it keeps running. any ideas???