Volvo Forums - Volvo Enthusiasts Forum - Sluggish Throttle Response

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740_in_TX

05-23-2006 08:51 PM

Sluggish Throttle Response

My 91 740 WGN (non turbo) runs great for about 30-45 minutes, then the throttle gets sluggish. When I try to accelerate it just bogs down and when I let off it picks up a little. I have replaced the plugs, cap, rotor, wires, air filter and done an oil change recently. I just got this car and don't know the history but it was well kept judging by condition. Also, where can I find a vacuum diagram to troubleshot my A/C problem. Any help would be appreciated.

tech	05-23-2006 09:19 PM

RE: Sluggish Throttle Response

Try to feel the Exhaust and see if it feels restricted.

Possible Bad Cat Converter.

740_in_TX

05-25-2006 07:01 PM

RE: Sluggish Throttle Response

Checked cat out and it's fine. When the sluggishness starts I can pull over and restart the car and it runs fine for a while, also the rpm's are at about 2K whene I stop. Is this a computer problem?

tech	05-25-2006 08:54 PM

RE: Sluggish Throttle Response

Maybe a Mass Flow.

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