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High rpm bog out issue
Okay so I have a 91 fc with a Na 13b with a street port when I take off first and second pull hard and run good but after that I start getting to the top end of 3rd Amd it boggs out and does so in 4th and 5th I can ease the throttle and Cruze no problem but if I give it to Much it Boggs but doesn’t die I unlplugged the top injectors and the car still ran ? Is that normal? do I need a tuned Ecu? Bigger top injectors? Someone please help I’ve been throwing to much money at this thing because the body is so clean and it runs great besides that |
When you say, "bog," what exactly do you mean. If the torque just kinda dies off at the top end, check to see if your 5/6 port actuators are functioning properly. If they don't open correctly the engine will starve for air at high rpm.
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Curious if you found a solution to your issue? I have an '85 GSL-SE doing very much the same thing.
Mine will drive hard and smooth through redline when cold. After about 20 minutes on the road, I get a bogging behavior under moderate to hard acceleration (3rd gear). It gets progressively worse as I continue to drive, affecting other gears as well, eventually to a point where any acceleration in any gear bogs down. However, if I slip the car out of gear the engine DOES rev freely all the way through redline, no bogging, smooth as can be. If I allow the car to cool for 15 minutes or so it then will drive normally again. |
oxygen sensor or fuel filter, maybe?
check these out and see if anything in them helps: https://www.rx7club.com/1st-generati...range-1147963/ https://www.rx7club.com/1st-generati...armup-1129603/ |
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