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91 buick wont start

I just purchased an 91 Buick park avenue it wont start replace the ignition coil and battery still no spark or fire can you give me some help with my problem?

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  • Anonymous Feb 05, 2009

    HAD 97 BUICK WITH SAME PROBLEM--FIRST TURN SWITCH ON--IF SECURITY LIGHT ON DASH FLASHES IT MEANS THERE IS PROBLEM WITH THE SECURITY SYSTEM--WRONG KEY-WRONG KEY CODE--SECURITY PELLET MISSING OUT OF KEY--WIRING FROM IGNITION LOCK CYLINDER DOWN TO SECURITY MODULE UNDER DASH AT BASE OF STEERING COLUMN BROKEN/OPEN----CHECK RESISTANCE OF PELLET IN KEY--GO TO RADIO SHACK AND PURCHASE RESISTOR OR RESISTORS THAT ADD UP TO MEASURED RESISTANCE OF KEY--CUT WIRES FROM KEY CYLINDER TO MODULE AND TIE IN THE SAME RESISTANCE VALUE BETWEEN THE TWO WIRES FROM MODULE TO LOCK CYLINDER THAT WERE CUT--TURN SWITCH ON--IF SECURITY LIGHT C0MES ON STEADY IT SHOULD START UP---MIND DID--THERE ARE 15 DIFFERENT RESISTANCE VALUES THAT COULD BE USED IN EACH CAR--GOOD LUCK

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Could be the coolent sensor but most likely the ignition control modular or camshaft (not crankshaft) sensors. One by the pully the other by the water pump. I'd start with that one since you dont need a pully to get to it. Auto zone and napa test the ignition mods and say they are good, but the test they run on them does not get them hot enough they also check the coil pack. You might want to check the the wire leading to both of the cam shaft sensors as well.

Posted on Jul 02, 2014

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Have you tried replaceing the ECM module?
This is located under the distributor cap.
It will be screwed down possibly.
Usually with PHILLUPS SCREWS (2).
This is an electronic part so it is crucial you are careful with it and keep area around and near as clean and dry as possible.
NOT an extremely hard job but can become hard if screws or parts get damaged or wires get crossed trying to remove them.
Also you can damage other things during process of removal and installation if not careful.
TO REPLACE ECM (if equipped) (To find out if your car has one you can call parts house such as O'Riellys and ask them.): Remove distributor cap being careful not to remove more than one sparkplug wire (Fireing order will be required to put them back if you dont know which came from where.)
After removing cap remove rotary button.
ECM should be lying flat in bottom of distributor.
Wires will be running to it. Again BE CAREFUL. Dont distroy connectors or wires.
Replacement of ECM module is as simple as removing and replaceing with identical replacement part.
If new doesn't look like old part INVESTIGATE to be sure replacement part will suffice.
Replace all parts and connections. (Then I recommend you stop and gather yourself and go over reinstallation just to be sure you didn't forget or miss anything.)
Remove all tools from work area under hood.
If this was your problem your engine should easily START.

Posted on Jan 30, 2009

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Try changing the plugs and wires if that don't work you may want to check the crank and/cam position sensers

Posted on Jan 29, 2009

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