Cliffnotes: Engine keeps shutting off when I downshift from 3rd to 2nd in fast driving. VERY bad throttle response in low rpms. Engine running rich. /me thinks it's the AFM.
Ok so here's the deal. I'm on the way home from Fedex on a spirited run through one of the handful of twisty roads in Florida. 3rd gear, coming into an S turn, heel and toe to 2nd gear and as I apply gas, I dont hear the revs.
I look at the tach and the revs keep dropping, at the point my heel is slamming the gas. Engine died. Feels like I flooded it. Weird.
Start up the car...... engine cranks, hesitates, dies. Try it again, gas all the way down, same. Try it again, and it cranks. Idle's funky, but it slowly levels out. I walk to the exhaust and I can smell the rich exhausts coming.... so rich I could get high off it.
So I get in the car after things seem back to normal and for shits and giggles I try it again. I take off in first and I have a VERY bad throttle response ( as in 2x or 3x worse than your average M20 AFM ) but past 2k rpms the power kicks in. 2nd gear through the turn...... 3rd gear turn..... coming into another 2nd gear, heel and toe again....... revs drop... gas gas gas..... engine dies.
Same "recouperating" process occurs. This time the CEL light came up. I turned off and did the punch the gas pedal 5 times to write down the code, but it didnt flash at all. When I took off ( driving smoothly all the way home )... I get a bad throttle response, even though I'm not pushing it.... and the Check Engine Light turns off the second you feel the power kick in from the throttle response lag.
The car drove home fine.... with a cranky throttle response that it always had ( nowhere near as bad when this was all happening, but worse than your average M20 ).
Any ideas? I think the AFM circuits are fried or something and that flap is not operating properly, because the engine goes to mega-rich when I crank the gas at low rpms. No vacuum leaks from anywhere in the intake system (my exhaust gaskets are bad)
Thanks,
Erick
Ok so here's the deal. I'm on the way home from Fedex on a spirited run through one of the handful of twisty roads in Florida. 3rd gear, coming into an S turn, heel and toe to 2nd gear and as I apply gas, I dont hear the revs.
I look at the tach and the revs keep dropping, at the point my heel is slamming the gas. Engine died. Feels like I flooded it. Weird.
Start up the car...... engine cranks, hesitates, dies. Try it again, gas all the way down, same. Try it again, and it cranks. Idle's funky, but it slowly levels out. I walk to the exhaust and I can smell the rich exhausts coming.... so rich I could get high off it.
So I get in the car after things seem back to normal and for shits and giggles I try it again. I take off in first and I have a VERY bad throttle response ( as in 2x or 3x worse than your average M20 AFM ) but past 2k rpms the power kicks in. 2nd gear through the turn...... 3rd gear turn..... coming into another 2nd gear, heel and toe again....... revs drop... gas gas gas..... engine dies.
Same "recouperating" process occurs. This time the CEL light came up. I turned off and did the punch the gas pedal 5 times to write down the code, but it didnt flash at all. When I took off ( driving smoothly all the way home )... I get a bad throttle response, even though I'm not pushing it.... and the Check Engine Light turns off the second you feel the power kick in from the throttle response lag.
The car drove home fine.... with a cranky throttle response that it always had ( nowhere near as bad when this was all happening, but worse than your average M20 ).
Any ideas? I think the AFM circuits are fried or something and that flap is not operating properly, because the engine goes to mega-rich when I crank the gas at low rpms. No vacuum leaks from anywhere in the intake system (my exhaust gaskets are bad)
Thanks,
Erick
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