When I push the gas pedal my car's check engine light starts flashing and my vehicle boggs down and wont build up speed. When i let off the gas a little my car then slowly starts to pick up speed and my check engine light stops blinking. ive been told i need a new coil assembly and all new spark plugs and they estimated $242 is that right?

SOURCE: 2000 Hyundai Accent will suddenly stall and wont restart

Have someone check the idle sensor. I had to have mine replaced along with another that I don't remember which one is was.

SOURCE: 2001 hunday gx300 sputter when pushing on gas while driving or pa

QUESTION: "it doest while driving or park" ???? HUH? What you wrote is CONTRADICTIVE. Based on what you wrote, there's no telling what the problem is. It either DOES IT.. or it DOESN'T. Which one is it?
I'm going to assume you meant IT DOES IT while driving OR in Park.. is this correct? If so, then the possible causes are NUMEROUS!.. Let's verify - 2001 XG 300?.. correct? How many miles? 50,000, 60,000, 100,00 mile? Maintenance history? what repairs have been done and what hasn't? Your 2001 XG is equipped with an ETS (Electronic Throttle System) - this means that your accelerator is not DIRECTLY connected to your throttle. Instead, your throttle is controlled by a motor. In essenece, it is 'Drive by wire' throttle (not cable). The sofisticated electronics used to control your throttle plate is very complex... there are two critical sensors (which if they go bad) can affect engine performance.
Now here's an IMPORTANT question -- please read carefully - Does the Check Engine light come ON when this happens? Whenever the "Check Engine" light comes on, there is always a DTC (Diagnostic Trouble Code) stored in the ECM (Engine Control Module). You'll need an OBDII (On-Board-Diagnostics) scanner to retrieve any codes recorded/set in ECM. Once you do this and let us know what, if any codes are set, then we can go from there. If there is NO Check Engine light, perhaps the bulb is burned out (then you'll get a DTC of P0650 - MIL lamp malfunction). In any case, you either need to educate yourself regarding the systems incorporated into your vehicle (Go to http://www.hmaservice.com/ and register (vehicle by VIN). Afterward, you'll have access to technical information (manuals, wiring diagrams, service bulletins, etc) about your vehicle). This way you can possibility fix it yourself. OR Take/tow the vehicle into a Hyundai Service Center (dealership), pay the diagnostic fee. They will tell you EXACTLY what the problem is and what's needed to fix it (parts, labor, tax, time-frame, etc.).

PAUL MC G

• 1280 Answers
• Posted on Oct 18, 2009

SOURCE: 2000 Hyundai Sonata GLS V6 - problem started last

Whenever the 'CHECK ENGINE' 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 and perhaps eventually fix the problem.

SOURCE: 2001 Hyundai Santa Fe check engine light and transmision troubles

your guess is as good as anyones. Someone will have to look at this in person.

SOURCE: car is trying to start but wont turn over. spark

Have the fuel pressure checked. Fuel pump may have given up.