Question about 1993 Buick LeSabre

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1993 buick laSabre running fine then allof sudden will not start

1993 buick la sabre~was running fine last night ,then today will not start!turns over fine couldit be a fuse for the fuel pump and where is it located? or a rlay and where would it be located? or none of the above and need to replace the fuel pump? any help would be greatly appreciated!!! THANK YOU ~~~Deno

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  • larryred2 May 11, 2010

    Bad wiring on 93 buick alternator. the car keep cutting off. i think it my be wirer wrong, from the alternator to the starter. can you help.

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I realize you may have already solved this but, this happened to me also in July...

I had to have it towed... a jump wouldn't work (battery was fine).

It was the...

ECM: Electronic Control Module
or
ECU: Electronic Control Unit

From repairpal.com: The vehicle's engine control unit (ECU) is a computer that receives information from sensors in the engine. The computer processes this information and makes calculations to control ignition timing, fuel-delivery parameters, engine idle speed, and pollution emitted from the vehicle. The control unit interacts and makes mutual decisions with systems throughout the vehicle. On newer vehicles, the ECU may also control the engine cooling fans, cruise control, and AC Compressor.

They told me they hooked it up to another one to confirm that's what it was. I think they said the fuel pump was working, but the signals weren't getting through (?). I'm guessing they only had to connect one of those diagnostic OBD things to it.

Anyway, they showed it to me, it was a small motherboard about 4x6 inches in a small black holder. He said the part alone cost about $400, but I've not been able to confirm this on the web to see how badly I got ripped off. When your car is sitting dead as a bug in someone's repair shop, and you are helpless as to how to fix it, unless you can afford to have it towed to multiple places, well, you gotta go with what they tell ya. Every place I check on the web for this make/model of ECM says "call for price".

Perhaps I got ripped off for $400 for the part, but I wouldn't know how to put it in regardless.

Anyway, that's why the car was dead as a doornail despite the battery and other things being fine. No information was getting through because the control module was dead.

I'm not saying this is/was your problem, but it may have been.

Posted on Aug 30, 2009

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Check to see if your getting fuel there is a shreader vavle on the fuel rail looks like a tire cap remove that and push in the shreader if no fuel comes out you have a bad fuel pump or no power to the pump check fuses first

Posted on Jul 15, 2009

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On the firewall under the hood is four relay switches under a black cover one of them is for the fuel pump

Posted on Jul 28, 2009

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I will try to help you with this. Ok, first of all, have someone get in the car. You need to go by the rear tire and listen by the gas tank. Have the person in the car turn the ignition to on, but do not start it. Do you hear a whining noice for a few seconds? If so, then your fuel pump is working. If not, then here are your answers. The fuel pump relay is located behind the glove compartment. There will be a strip there with 2 colums of relays, 4 in each column. Looking at it, your fuel pump relay will be the 2nd from the bottom on the left hand side. The one right above that, or 3rd from the bottom on the same side is for your fuel injectors. As far as a fuse goes, the inside compartment fuse box, would be number 16 for your SFI. This one is in the second column on the top. This also controls your cooling fan. Let me know if you need further assistance. Thanks.

Posted on Jul 15, 2009

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