So I have a 1990 na rx7 thats currently having some issues. It runs rich with fuel and very often does it not rev above 2k rpm even when your holding the gas pedal down no matter what gear your in even nuetral, it just hits 2k drops to 1.5k and does it again. I replaced the mafs thinking that it was reading my intake wrong but it didnt help.

I had spoken to someone previously who said they had a similar issue. They said it ended up being a small plastic piece that he got off ebay for 18 bucks bit couldnt remember the name and hasnt gotten back to me.

If anyone has any ideas please let me know, thanks.