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91 Olds Supreme Won't Start???
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pttech
New User
Apr 1, 2007, 9:46 PM
Post #1 of 2
(1898 views)
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91 Olds Supreme Won't Start???
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91 Olds Supreme won't start. (T), 3.1, 133k miles, no add-ons or other stuff. Will turn over, but spits and hesitates trying to start. Lost power going down road. Replaced battery. Replaced Crank Sensor. Replaced Ignition Module. Replaced fuel pump relay. Has spark. However, I pulled one of the spark plugs and appeared dry - like no fuel was getting to it. Checked two of the injector ports with an electronic node checker and they are pulsing. Plug wires appear to be good. The other injector ports are under manifold and have to remove plenum to get off. How would you check the other ports??? How would you check timing if it won't start???
I have narrowed it down to four things: 1. ECM or computer needs to be replaced? 2. Timing chain needs to be replaced - however may seem unlikely given the low mileage. 3. Catlytic converter 4. Or something with fuel???
What is a likely part I should look at next.
Thanks a million.
pttech
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steve01832
Veteran
Apr 2, 2007, 4:03 AM
Post #2 of 2
(1893 views)
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Re: 91 Olds Supreme Won't Start???
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Install a fuel pressure guage onto the check port and turn the key on engine off. Fuel pressure should be around 37 psi. Crank the engine. Fuel pressure should hold between 33 and 38 psi. If you have no fuel pressure at all you need to check for power and ground at the fuel pump with a test light. Key on engine off, light should glow for 2 seconds and turn off. Crank engine, light should glow steady. Replace fuel pump and sender.
Steve
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