1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Engine Missfire Diagnose.

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Old Apr 29, 2010 | 07:26 PM
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never mind got it
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Old Apr 29, 2010 | 07:33 PM
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Bleed off fuel pressure
Disconnect negative battery cable
Disconnect fuel lines
Unplug injectors
Remove top bolt holding fuel rail down.
Remove four bolts holding down fuel rail at base
Lift up fuel rail, injectors will come up with it.
Remove injector clips (the 2 you want to change)
remove injectors
Put injectors back in (different location)
Put injector clips back on
put fuel rail and injectors back in and seat
Put 4 nuts back in place to mount fuel rail
put top mount bolt back on
plug in injectors
connect fuel lines
connect negative battery cable
clean up any fuel
turn key and wait a moment for fuel pressure to build back up.
Start engine.
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Old Apr 29, 2010 | 09:01 PM
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why don't you try flipping that pair of IGN wires at coil. see if problem moves cylinders. we want to rule out coil absolutely before changing injectors or pulling valve cover.
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