Question about Toyota Avalon
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Posted on Jan 02, 2017
SOURCE: when i start my 1998
98 Honda well a model type willl be great and even a 4cyl or 6cyl. But it doesnt matter we will trouble shoot who control this flucuation FIRST CHECK THE AIR FILTER it may be plugged .IF IT ISNT THEN DO THIS. All 1998 hondas wether its 4 or 6 is a speed density system. so this is easy its a vacuum leak that is affecting the map sensor. where is the map sensor on top of a throttle body you can find it location under the hood diagram.you just need to make sure a vacuum hose isnt leaking this means are there any diconnected? this is a visual inspection now you ll have to inspect for internal vacuum leak that will cause this okay you did the tune up youself? Then you can troubleshoot this youll need a hand that can feel hot and warm.if you engine is running rough find the EGR valve its on the right side of engie above intake manifold.now if the car engine is unstable feel the valve if the surface temperature of the intake is the same as the surface temperature the valve it is most like not the problem, If the temperature of this valve is hoter than the surface temperature of the intake manifold this valve is open , you can remove it and clean the inside. But here is the problem some EGR system differ on the model 1998 1999 some have linear EGR and some transducer. If the EGR is causing rough idle its pintle valve is open and youll have problem as described some yes you can clear out the debris in the pintle area and some well it too late you ll just have to replace it
Posted on Apr 30, 2011
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