Having problems with your 2001 Hyundai Accent ?

No power on throttle down

\015 Step on pedal no throttle pump actuation\015 Posted / edited by AnonymousUser on : 25-03-2019

Answers :

This is an injected engine, carbs having gone the way of the horse and buggy, so it has no "throttle pump". I assume by that you meant accelerator pump, which on a carb engine would give an extra squirt of fueldown the carb, when the accelerator was moved, prreventing a hesitation on acceleration. Aside from one old Bosch system on an ancient Volvo, I'm unaware of any passenger car with any additional unit to provide supplemental fuel, except some older systems that employed a cold start valve, for cold enrichment. This being said,one of the duties of the throttle position sensor is to serve notice on the pcm, that there has been an increase in throttle opeming, so in essence, the tps serves as a sort of electronic version of an accelerator pump. You didn't mention codes, so this is where I would start looking. I'm assuming everything else is in reasonable shape. You will need a lab scope or some type of graphing meter, to visually "see" the signal from the tps during operational movement, and look for dropouts and glitches in the signal. Not everyone has access to this type of equipment, so it is possible at some shops, to have the problem diagnosed, for a fee, and then you can perform the repair yourself. Just be sure to let the hard working fellas in the garage know that this is your intent up front, as they will be losing income on repair labor and parts markup, and may have to adjust their fees accordingly. A good wrench that has good diagnostic skills is worth his weight in platinum, and keeping him happy can save you much wasted time, money, and effort. Feel free to get back to me if this does not address your problem directly, and we'll see what we can figure out from there. Thanks, and best of luck!
Repair Help & Product Troubleshooting for 2001 Hyundai Accent

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