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1994 Chevy Suburban Engine won't start

Tiny
ZANY
  • MEMBER
  • 1994 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 245,000 MILES
Engine was running rough at idle and all speeds.
Replaced the fuel filter. Still the same.
Replaced the spark plugs with manufacturer specs, gapped to 0.035", new distributer cap and rotor. Checked the compression - 125 to 145 psi.
Now engine will not start. Battery is fully charged, it cranks over. I see fuel spraying from the injectors into the throtle body; I pulled a spark plug and grounded it. It sparks. I then replaced the ignition coil. Still no good. The check engine light comes on during initial key turn, then goes out, like it is suppose to. Checked the ECM codes. There is no codes. It is clear. What could be wrong?
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Monday, January 25th, 2010 AT 9:22 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,779 POSTS
Are you getting a good hot snapping blue spark at the plugs? If you have a good spark, compression, correct timing, and fuel, it should run. Is there any chance you mixed up the wires when you replaced them? Have you checked basic ignition timing?
Also, will it fire with starting fluid? Are the plugs wet when you remove them after trying to start it?
Let me know.

Joe
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Tuesday, January 26th, 2010 AT 10:41 AM

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