Question about 1999 Buick LeSabre
Remember this problem. Cylinder 6 misfire on 99 buick Lesabre. You recommended switching the injector. I finally got around to doing it. I took the rail off and removed the suspected bad injector. The rail was connected to all 6 injectors, so they all had to come out. I moved the bad injector to cylinder number 3 and rebuilt the rail. You were right, it wasn't that difficult removing injectors. The car still runs rough in gear, which I expected. I went back to the store to check the engine code expecting there to be a misfire on number 3. However, the misfire was still on cylinder 6? So my fuel injector is okay. Where do you think I should look now? As a reminder, here's what I've done so far.
1. Replaced all plugs and wires, no change (misfire # 6).
2. Moved ignition coils around, no change (misfire # 6).
3. Moved fuel injectors around, no change (misfire # 6).
Hey thanks for bringing me up to speed. ive been working on many other problems but with your great explanation i remember.
we need to check the compression on that cyl. and compare it to the compression on 2 other cylinders your choice.
but before you do this get a can of carb cleaner . and with the car idling spray around the intake manifold in the area of #6 cyl. what we are looking for is a small vacuum leak that would also act like this. with the engine idling and spraying around the intake the engines idle sould not change and if it does when you spray you have an intake leaking.
let me know how it turns out.
Posted on Sep 23, 2008
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