What could cause this

Tiny
PAPADUCKIE
  • MEMBER
  • 1999 BUICK LESABRE
  • 85 MILES
Had problems getting the car to run finally got it to idle real well with no problems. Now when I try to give it gas it hesitates. I can get it up to about 4000 rpm`s and it will hesitate between 4k down to 3k rpm`s with idle held in same spot. If I try to give it more gas than 4k rpm`s it tries to die out. Not sure what would cause this as the check engine light does not come on and I have replaced fuel filter. Fuel pump relay, cleaned maf sensor checked tps sensor and replaced 2 cracked vacuume lines to get it to this point. I`m thinking maybee a pluged fuel injector but not sure. Any help will be greatly appreciated
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Tuesday, April 24th, 2012 AT 3:52 PM

2 Replies

Tiny
RASMATAZ
  • MEMBER
Go to this walk thru link: http://www.2carpros.com/articles/engine-hesitates
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Tuesday, April 24th, 2012 AT 4:02 PM
Tiny
PAPADUCKIE
  • MEMBER
I have replaced the plugs with bosch platnum+4 car idles great but when rpm s get to 4000 it goes back to 3000 and back to 4000 and flucuates between there with throttle held in same spot. This has me baffled I have lucas fuel treatment in gas and it doesnt make any difference
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Tuesday, April 24th, 2012 AT 11:19 PM

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