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high acceleration when starting

Old 03-14-19, 05:16 PM
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KS high acceleration when starting

i have a 86 NA when i start it up it revs to 5000 rpm and stays there. sometimes it doesnt do that but it surges a lot. the throttle feels really off too. i disconnected the hot start assist that is on the driver side from the top of the motor. i dont know what is wrong with it and ive looked and found some stuff but it doesnt really work. the throttle body seems to be good because its not stuck or anything.
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Old 03-14-19, 05:42 PM
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5k is a bit high, these cars have an accelerated warmup mode but thatís usually right around 3k Rpms until after about 30 seconds it will slowly drop and eventually level out below 1000. Have you tried starting it in 1st gear with the clutch pedal down? It should disable this. Otherwise I would check your throttle plates and be sure nothing is sticking open

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Old 03-14-19, 05:51 PM
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yeah i tried the whole clutch thing but it didnt work. i checked the throttle body and the top two plates are open. are they supposed to be closed?
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Old 03-14-19, 11:34 PM
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Sounds like the idle speed adjustment is jacked up. Try fiddling with the screw on top the throttle body to tone it back down to a reasonable range.
The 3k warmup should go away if you disconnect the two pin plug on the bottom drivers side of the radiator. If your car is ramping up to 5k when cold you are risking damaging the engine.
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Old 03-15-19, 03:48 PM
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Originally Posted by Akaviri View Post
Sounds like the idle speed adjustment is jacked up.
I would assume there is a disconnected or cracked vacuum hose before I touched the idle speed.
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Old 03-16-19, 04:30 AM
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Originally Posted by chuyler1 View Post
I would assume there is a disconnected or cracked vacuum hose before I touched the idle speed.
That is a fair point I hadn't considered. However I would normally assume a loss in vacuum would cause it to stall, not surge higher? I once forgot to reconnect a vacuum line and my car wouldn't hold idle for more than 2 seconds without it.
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