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1999 jimmy sle 4.3 4x4 wont start in the rain


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shot
User

Apr 29, 2014, 10:16 AM

Post #1 of 9 (1360 views)
  post locked   1999 jimmy sle 4.3 4x4 wont start in the rain  

I have a 1999 jimmy 4.3 sle 4x4 when it rains sum times it wont start .I put a new Distributor cap an rotor new wires an plugs a new back up Distributor I sprayed all the wires with silicone . when it rains sum times I can keep turning it over an over an then it will start an then it will run bad till it dries out HELP?????? Thanks


Discretesignals
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Apr 29, 2014, 12:49 PM

Post #2 of 9 (1348 views)
  post locked   Re: 1999 jimmy sle 4.3 4x4 wont start in the rain  

When it doesn't want to start is spark missing? Have you checked all your electrical harnesses and connectors for damage or water intrusion?





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shot
User

Apr 29, 2014, 3:03 PM

Post #3 of 9 (1338 views)
  post locked   Re: 1999 jimmy sle 4.3 4x4 wont start in the rain  

yes I still get spark I check what I can see sprayed silicone on wires


kev2
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Apr 30, 2014, 3:32 AM

Post #4 of 9 (1316 views)
  post locked   Re: 1999 jimmy sle 4.3 4x4 wont start in the rain  

Scan for codes ESP if the cel is off.

If you see a spark when spraying wires that is a problem .... spark is checked at PLUGS several plugs-

always AC Delco plugs, first checl if coil is firing then ck several plugs.


Hammer Time
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Apr 30, 2014, 3:43 AM

Post #5 of 9 (1315 views)
  post locked   Re: 1999 jimmy sle 4.3 4x4 wont start in the rain  

You also want to see how strong the spark is when testing. It should be able to jump a 3/4" gap. Look closely for any carbon tracking on the coil. They tend to crack and arc to the mounting bolts.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



nickwarner
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Apr 30, 2014, 7:23 AM

Post #6 of 9 (1307 views)
  post locked   Re: 1999 jimmy sle 4.3 4x4 wont start in the rain  

Suspecting the same thing as HT here. If you don't want to have to wait for it to rain there is an easy way to check this. Mix up a spray bottle with salt water in it. Salt water carries electricity better than regular water and will show issues faster. Get things good and dark in the area you are working in. Start the engine and start spraying the water around the coil and cap area. Look for arcing from the coil housing to ground. Should get a spark that is visible and a noticeable change in engine pitch when you hit the bad spot.


shot
User

Apr 30, 2014, 1:33 PM

Post #7 of 9 (1301 views)
  post locked   Re: 1999 jimmy sle 4.3 4x4 wont start in the rain  

thanks I will try the slat water.


dntchke
User

Aug 20, 2014, 3:40 AM

Post #8 of 9 (1186 views)
  post locked   Re: 1999 jimmy sle 4.3 4x4 wont start in the rain  

new cap and rotor


Tom Greenleaf
Ultimate Carjunky / Moderator
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Aug 20, 2014, 3:44 AM

Post #9 of 9 (1185 views)
  post locked   Re: 1999 jimmy sle 4.3 4x4 wont start in the rain  

Too old sport - locked thread now, T







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