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1999 Dodge Ram wont start

Tiny
JGORDIUS
  • MEMBER
  • 1999 DODGE RAM
  • V8
  • 4WD
  • AUTOMATIC
  • 100,000 MILES
360ci engine. Live on the coast where temp is always 45-50F, now I'm up in the mountains at 0F went out next morning and eng turns over but no fire. Changed cap rotor and pick-up plate under rotor and still won't start. Checked fuel pressure on schrader valve on fuel rail and lots of pressure. Think maybe the brain?
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Saturday, January 26th, 2008 AT 8:52 PM

5 Replies

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Will it fire up with starting fluid sprayed directly into the throttle body?

I belive it may be a bad coolant temperature sensor.
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Saturday, January 26th, 2008 AT 9:03 PM
Tiny
JGORDIUS
  • MEMBER
  • 3 POSTS
We tried starting fluid but to no avail. It warmed up a bit today and it seemed like it wanted to fire (almost) at one point but still no fire. Fuses are good but I don't have a tester to see each side of the relays. Where is the coolant temp sensor, also where is the crankshaft position sensor. Do you think that could be the culprate as well?
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Sunday, January 27th, 2008 AT 12:26 PM
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
I belive the coolant temperature sensor on your model is located near the thermostat housing or right after the upper radiator hose.

I do not belive a crank sensor will cause a cold start problem.

Are you getting bright blue spark at each cylinder?
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Sunday, January 27th, 2008 AT 2:45 PM
Tiny
JGORDIUS
  • MEMBER
  • 3 POSTS
You're not talking about the temp sending unit are you? I had one of the posts break off on it before and all it did was make my temp guage show maxed out. It screwed into my manifold. I will check for spark now. If there is no spark do you think it could be my ecu (brain)? I will go to auto parts giant now and see what the temp sensor unit looks like. So that would cause the motor to not start at all?
Thanks for your help.
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Sunday, January 27th, 2008 AT 3:18 PM
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Usually causes a cold start problem even a no start.

There is a coolant sensor and a sending unit, the send unit shows temp doesnt affect engine.

Im thinking you may not be getting spark since starting fluid didn't help
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Sunday, January 27th, 2008 AT 6:44 PM

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