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'87 240 has serious stumble off-idle. 200 1987

jorrell, LOL.

The 340 is in my '73 Dart Sport. I've got a 3/8" ID line with a 68 gph pump feeding the 750 Holley.

Anyway, the Volvo still has its original B230F in it. What really confuses me about this problem with the Volvo is how quickly it started. It was running fine one minute and suddenly started running lousy.
I can let the car idle and slowly ease out the clutch and the car begins moving. However, the moment I touch the throttle the engine dies.
Just curious, is there a way to diagnose the mass air sensor, or whatever that sensor is called that is between the throttle body and the air filter?

Thanks.






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