CAR CRANKS BUT WONT START WHEN COLD UNDER

1989 Oldsmobile 98

Tiny

jeffclark29

January, 12, 2013 AT 7:58 PM

Car cranks but won't start when cold ( under. 30 degrees)
If and or when car does start, after its warm car starts fine until
Next morning after sitting all night then car cranks forever
When air temp stays above 30-35 car cranks and starts fine?

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5 Answers

Tiny

Jacobandnickolas

January, 13, 2013 AT 3:26 AM

When it is cold, check fuel pressure. It sounds like you have a weak pump.

Tiny

jeffclark29

January, 13, 2013 AT 6:48 AM

Hadn't thought of that thanks

Tiny

Jacobandnickolas

January, 13, 2013 AT 10:53 PM

Let me know what you find. Also, an easy way to test it is to see if the engine will start with starting fluid when cold and stay running. Some pumps produce enough to keep the engine running, but not enough to start them cold.

Tiny

jeffclark29

January, 13, 2013 AT 10:58 PM

Starting fluid didn't help.

Tiny

Jacobandnickolas

January, 13, 2013 AT 11:13 PM

Have you checked to see if you have a good hot blue snapping spark to the plugs when cold?

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