95 ran good, ran rough, won't start

[rmcilvaine]

Hi,

I have a 95 Aurora. Two days ago it ran fine. Yesterday, it ran rough for a while then smoothed out. When it ran rough, the little solenoid at the throttle that clicks when you shut it off was clicking. It ran like a miss, but it was not a regular miss, it was erratic.

Today, I started it and it ran fine for a minute or so. Then it started to run erratic again. Finally it quit and now it won't start.

Does anyone have any ideas on this? Does anyone think this could be the crankshaft position sensor?

Ron

[rmcilvaine]

Today, the car will not start, not even a sputter. The check engine light is not on except when cranking the engine. The clicking in the throttle now happens when I crank over the engine and continues for a minute or so after I stop cranking the engine.

[rmcilvaine]

I've done some checking. I have spark. Fuel pressure is only 20-psi. Sometimes it gets to 40-psi but then drops when I crank the engine.

Shouldn't it be about 45-psi?

Fuel Pump?

[Sweet William]

Pull the vacuum line off the fuel pressure regulator. If there is any gas present it is bad.

[rmcilvaine]

No gas in the vacuum line. Same results, fuel pressure up to 40, drops to 20.

Fuel pump?

Did I read somewhere in this forum that the fuel pump can be replaced from in the trunk?

[1995oldsaurora]

Originally Posted by rmcilvaine

No gas in the vacuum line. Same results, fuel pressure up to 40, drops to 20.

Fuel pump?

Did I read somewhere in this forum that the fuel pump can be replaced from in the trunk?

i had a very similar problem..it was a bad fuel pump,which is replaced through the trunk..

[rmcilvaine]

Thanks. That's what I'm doing.

[rmcilvaine]

Well, I replaced the fuel pump and now I have fuel pressure (45-psi) but it will not start. It cranks over and pops through the intake and exhaust once in a while but it will not start. I tried some ether with no positive results. I have placed my timing light on the each of the front 4 plug wires and I have spark. I've not yet pulled a plug. I suspect if they are fouled, that current would travel through plug wire so that the timing light would register spark without actually producing a spark at the plug. It's hard to beleive that all 8 plugs would foul at the same time.

Any Ideas?

[Retro-D]

It would help if you could throw a scanner on to see if any sensor codes were thrown. If the engine is flooded you can clear it by cranking with WOT (wide open throttle), this shuts off the injectors and clears out the fuel. You could have a faulty camshaft position sensor or one of the two crankshaft sensors. Even with a bad sensor the car should start (with some difficulty) and run in "module mode", at this point the SES light would be on.

RD

[rmcilvaine]

Well, it was plugs and wires.

Ron