Question about 1999 Hyundai Sonata
First thing to do is get the computer scanned for trouble codes. The codes will point you to what needs to be tested.
Chances are its the throttle position sensor, but it could be several other things.
Posted on Jan 16, 2013
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Posted on Jan 02, 2017
change fuel filter. If you have someone local, have them run a fuel sytem clean out on your car. Then add a can of Seafoam to your fuel. It is all about the ethanol goop problem that are causing all the problems on these cars. it fills the system up with water, and turns to gas into a brown syrup. but every 3000 miles(after this). if you add Seafoam to your car, it will keep the lines clean, break up the goop, and your car will not have line freeze up this winter. good luck
Posted on Aug 28, 2009
well it could be as simple as just replacing the fuel pump relay. it's located in the junction box under the hood. if the relay is good then check the fuel cutoff switch. that is located behinfd the fabric in the trunk along the wheel wells. if this was not triggered then it could be that you might have a glitch in the ecm water is not kind to computers especially cars that have the ecm's in the engine compartments
Posted on Oct 05, 2008
We've have the same problem with ours. We found the fuel canister needed replaces. It's mounted near the back bumper with straps. The part cost us about 125 bucks and was pretty easy to replace. The trick is to get the bolts out without snapping them.
Posted on Jul 13, 2009
Whenever the 'CHECK ENGINE' (Service Engine Soon) light comes on, the ECU (Engine Control Unit) sets a Diagnostic Trouble Code (DTC). These codes identify the particular engine management system which caused the light to come on.
You'll need to use/find an OBDII (On-Board Diagnostic) Scanner to retrieve any code which have been stored in the ECU computer. Afterward, we might be able to help you DIAGNOSE the problem and perhaps eventually fix the problem.
Posted on Oct 04, 2009
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