Car will not start

Tiny
MYMOUNTAINESCAPE
  • MEMBER
  • 1994 BUICK CENTURY
  • 3.6L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 64,000 MILES
I recently removed bad gas from the vehicle. After that, the car would start, run a few seconds-then shut off. Now, the car will not start at all unless I spray gas into the injectors. I am unable to extract the codes to determine the problem, as an OBD1 nor OBD2 code reader will work.
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Thursday, April 6th, 2017 AT 4:32 AM

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Tiny
HMAC300
  • EXPERT
Cross A and B with a paper clip and turn key on see if any codes pop up. Check fuses as it may be a bad fuse. Then check fuel pressure should be 41-47 psi with key on and hold for five minutes with in 5 psi. If not minimum pressure pump or regulator is bad more than likely pump.
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Thursday, April 6th, 2017 AT 6:11 AM
Tiny
STEVE W.
  • EXPERT
Start run a few seconds and shut off sounds like you have a bad fuel pump or plugged fuel filter that has now become worse. Run a fuel pressure test on it to see if you have 41-47 psi at the rail. Run a jumper wire to the pump test wire and see if the pump comes on.

GM did not have a 3.6 in the Buick in 1994, they had the 2.2 or the 3.1.

The 2.2 would be an 8th digit VIN 4 and OBDI with the 12 pin connector shown below. You can read codes without a scan tool by shorting the two top right connectors (A and B) in the test port together with the key off. Then turn the key on and count the flashes. Flash pause = 1 Flash, Flash pause = 2 and so on. Each code flashes three times. It will start with 12 to tell you it is in diagnostic mode, then end with 12 to tell you it is finished. So you would see 12, 12, 12 - 34, 34, 34 - 12.12.12 for a code 34.

The 3.1 could be one of a few versions, depending on what the 8th VIN digit is and when it was actually built.
It could be a VIN T OBDI with the 12 pin connector and can be jumpered.

Or it could be a VIN D OBDI with a 12 pin connector and nothing in the B position and requires a code reader
Or it could be a VIN M which are the 16 pin connector but require the special software to talk to the oddball OBD 1.5 system where they used a mix between both systems.

Take a look at your VIN number to tell which one you have. If it is the oddball you need something like the old Snap-On MT2500 or a Tech 2 both need the correct software and cable. 1994 to 1996 are such fun years.
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Thursday, April 6th, 2017 AT 6:46 AM
Tiny
MYMOUNTAINESCAPE
  • MEMBER
Thanks Steve,
You are right. My engine is a 3.1. Do not know where I got 3.6. It was my mother's car and had been sitting for almost three years until I had it shipped to me in early 2012. Just now getting around to tackling it.

Jimmy
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Thursday, April 6th, 2017 AT 7:58 AM
Tiny
STEVE W.
  • EXPERT
Three year old gas. That must have been nice stuff. Yuk. Run the pressure tests and see what you get. Also, plan on changing filters a few times, the new booze fuel will clean out the fuel system, and all the crud has to go somewhere.
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Thursday, April 6th, 2017 AT 11:18 AM

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