When trying to accelerate while driving on the highway there is no throttle response

Tiny
MRSTEVE4
  • MEMBER
  • 1992 BUICK PARK AVENUE
Hello. My car has been having a problem for a couple years now. It runs fine around town, but when I'm on the highway for an hour or so, the problem starts. When I press on the gas to speed up, it doesn't do anything. It's like pressing on the gas cuts off the fuel supply. (But it doesn't shut off.) If I let up off the gas a little, it kicks in again. If I pull off to the side of the road and put it in park, the engine runs fine. If I press on the gas, the engine revs up just fine. But if I start driving again, I get the same problem again. If I shut off the engine for 10-15 minutes, it starts up and will run fine again for a while. But then the problem soon starts up again. It's as if something gets hot, which affects the car's ability to accelerate; and when you let it cool down, it runs fine until it gets hot again. But again, this never happens just driving around town - even if I'm running around for an hour or so. Sometimes a two hour drive down the highway will require that I pull over and just sit for several 10-15 minute periods. Any ideas as to what might be the problem would be greatly appreciated. It's very frustrating.
Saturday, February 17th, 2007 AT 11:26 PM

2 Replies

Tiny
FLAMINGBUTTERFLY
  • MEMBER
  • 6 POSTS
Mine was acting similarly. The fuel pressure regulator was bad and when it got hot it drowned the engine. You might try a fuel pressure test to see if that is the issue.
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Sunday, July 26th, 2009 AT 12:59 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Just to add to this, not only a fuel pressure test confirm this regulator issue but it needs to be done when the vehicle is acting up. The best way to do it is hook up the gauge and then tape it to the windshield until you can verify the issue. This way you are able to continue with normal life for a few days and catch it when it acts up.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Thursday, March 26th, 2020 AT 7:58 AM

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