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98 GMC "slow" start

V8 • 2WD • AUTOMATIC
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JABBER7193
  • MEMBER
  • 1 POST
98 GMC Sierra 1500 5.0 - Just turns over when starting in the morning. Will start eventually, and after the initial start I have no problems starting it for the rest of the day. I have replaced the fuel filter, plugs, wires....and did a soft install of a new coil and ICM. Also, if I prime the engine with a lil starting fluid it makes the initial starting quicker. The pump makes niose like it is working. Kinda at a loss.
Dec 1, 2010 at 1:09 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
The pump may be losing its prime. I need you to check fuel pump pressure and specifically, fuel pressure drop off. That is when the key is turned off. The pressure should maintain for a period of time.
Dec 1, 2010 at 1:14 PM
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