Extended cranking

Tristan Edwards · Jul 26, 2016

Hi, I have a 1989 Chevy k1500 Silverado with a manual transmission and 215,000 miles. For the past couple years this thing takes about 5 cranks to fire up, but runs perfect. If I leave the truck for a few days it will fire right up (sometimes) but day-to-day it takes the usual long crank. However, it starts every time and crank sounds healthy and constant no matter the temp.
Recently I have replaced
-ignition module
-spark plugs
-fuel pressure regulator
-battery
-fuel filter
-alternator
And I've tested
-ignition relay
-And I've done the fuel pump prime test (no change)
This one has me stumped so id really appreciate any input!!

Tristan Edwards · Jul 26, 2016

Also, the truck does have an oil leak and the oil pressure drops to almost nothing at idle but is normal while cruising. Not sure if that helps any

df2x4 · Jul 26, 2016

Tristan Edwards said:
-And I've done the fuel pump prime test (no change)

What test are you referring to exactly? What does the spray pattern look like on the injectors inside the TB?

First thing that comes to mind when people talk about hard-start situations for me is fuel pressure.

Tristan Edwards · Jul 26, 2016

df2x4 said:
What test are you referring to exactly? What does the spray pattern look like on the injectors inside the TB?

You turn the key to the "on" position until you hear the pump turn off, then turn the key off and repeat 3-6 times then start. This usually tells if the fuel is feeding back into the tank instead of holding pressure. When I did this it didn't affect how it started.
Spray pattern seems normal. rapid, cone shaped

Justin S · Jul 26, 2016

I'd get an inline pressure gauge, and see what you're at after letting it sit. Fuel pumps can take anywhere from a few minutes to an hour or more for the fuel pressure to drop, so the key on key off test really doesn't tell much.

Extended cranking

Tristan Edwards

Newbie

Tristan Edwards

Newbie

df2x4

4L60E Destroyer

Tristan Edwards

Newbie

Justin S

Truck Hoarder

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