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1999 Toyota 4Runner Question: acceleration

 

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cece jack, Wapato, WA, September 04, 2009, 01:20
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had a tune up, flushed the fuel line, lube done, started losing power going up hill, what can it be?

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, September 04, 2009, 09:16
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    If a tune up was just done and this problem just occurred after the tune up I would go back to the repair show that did the work and get them to make sure they didn't inadvertently knock off a vacuum line or sensor connector.
    If the tune up was done to address this problem in the first case, and the problem is not a slipping clutch or transmission issue, I would verify the Check Engine light is not on during a rad test. If it is on I would retrieve stored trouble codes and follow the indicated trouble shooting path for the item the trouble code was stored. If no Check Engine light was on I would still plug in a scan tool to the diagnostic socket under the dash and monitor engine sensor data to see how much air the computer thinks is going into the engine (some Toyota/Lexus products had air flow meters that got dirty and caused a lag on acceleration, poorer fuel economy). I would also perhaps check fuel pressure and delivery if on a road test I felt that needed to be verified.

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  • Answer #2

    HandsON October 18, 2009, 08:51
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    Can be a bit pricy but you might want to have the teeth in the rear chunk checked. You won't notice a loss of torq untill the motor is under a load.

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  • Answer #3

    Visitor, April 14, 2010, 09:00

    you might have Overdrive on

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