Mazda miata running rough.ive.took to ahop they cant figure it out either

1990 MAZDA MIATA
202,000 MILES
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REEDBONE
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I have a 90 mazda miata and it runs really rough like low idle around 250 rpms sometimes I can.accelerate all way to floor and nothin happens it will still idle and I have to let it warm up for a lil while before I can raise the rpms to move it but when I go to move I have to raise the rpms to 4000 or it will try to shut off ive checked mass air flow meter and ive checked timing belt also check catalytic converter and idk what else I need help no to see ody I took to can fure it out and ive ch ecked ecu to see if it was ground out anything its not plz help
Jul 8, 2012 at 10:07 PM
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RASMATAZ
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Go to this walk thru link: https://www.2carpros.com/articles/engine-misfires-or-runs-rough
Jul 8, 2012 at 10:42 PM
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REEDBONE
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I just did and ive done almost everything it says onky think is I dont have a comprdoeasion teste anything else
Jul 8, 2012 at 11:11 PM
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REEDBONE
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  • 75 POSTS
I need help I dont know what to do anymore
Jul 9, 2012 at 1:08 AM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Do you have a check engine light? If it can idle try checking the ignition timing and fuel pressure with a gauge if its within normal specs
Jul 9, 2012 at 1:51 AM
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