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85 Buick Century bucking under moderate load

Tiny
OAKLEY1
  • MEMBER
  • 1985 BUICK CENTURY
I have an 85 Buick Century 150,000mi 2.5L TBI with an acceleration problem. Under low to modetare loads it bucks. Even with TCC unpluged. Plugs, wires, cap were replaced. Problem started soon after having ignition module replaced. While power braking and looking at the fuel injector you can see the fuel momentarily stop spraying when it bucks. Where does injector get its reference from? Could it be the ignition module, MAF sensor and if so where is it located?
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Wednesday, April 18th, 2007 AT 4:40 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the fuel pressure-the computer has to get an ignition signal before it pulses the injectors.
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Wednesday, April 25th, 2007 AT 9:08 AM
Tiny
OAKLEY1
  • MEMBER
  • 4 POSTS
It was the ignition module. The injectors get their reference from it
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Thursday, October 25th, 2007 AT 12:25 PM

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