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04-03-2013, 08:28 PM
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#1 |
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Registered User
Join Date: Jan 2011
Location: Godley,Texas
Posts: 3
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87 tbi no start at times
Truck runs good most of time, when rains or is humid will not start? I think I have an ignition switch problem,anyone have suggestions?
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04-03-2013, 10:23 PM
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#2 |
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Senior Member
 
Join Date: Jun 2010
Location: Illinois
Posts: 2,957
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Re: 87 tbi no start at times
Cracked distributor cap? Getting moisture inside the cap.
__________________
Roy 85 Short Bed Silverado- Work in progress. http://67-72chevytrucks.com/vboard/s...d.php?t=564818 1987 R10 shortie |
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04-04-2013, 10:43 AM
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#3 |
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been here longer than Liz
Join Date: Feb 2000
Location: Broken Arrow, OK
Posts: 2,437
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Re: 87 tbi no start at times
What Roy said. Check the ICM connection on the dizzy. Might not be making enough contact. Open it up, if there's surface rust that's likely your problem. Lightly sand it off (both pieces) then use dielectric grease on the contact area before screing back down.
__________________
~Greg~ Mac's Garage '87 SWB 6/8 drop "Piso" '08 CCSB Silverado DD the departed '89 GMC K5 Jimmy 4x4 "Rusty Nuts" '77 Chevy K5 Blazer 2wd '83 Chevy stepside "You get what you pay for" - Mike 'swervin ervin' Ervin |
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04-04-2013, 10:52 AM
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#4 |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: 87 tbi no start at times
my 87 had issues like that
i even replaced the pump got stuck again, found a cut/nicked/hard baked area in the power line over the drivers rear wheels arch
__________________
John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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04-04-2013, 11:27 AM
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#5 |
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been here longer than Liz
Join Date: Feb 2000
Location: Broken Arrow, OK
Posts: 2,437
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Re: 87 tbi no start at times
Good point John. Had a starting issue with my K5, couldn't figure it out til we dropped the tank. Some low IQ PO had spliced the trailer plug ground into the fuel pump ground wire. Sometimes the connection was loose enough to cause a problem.
__________________
~Greg~ Mac's Garage '87 SWB 6/8 drop "Piso" '08 CCSB Silverado DD the departed '89 GMC K5 Jimmy 4x4 "Rusty Nuts" '77 Chevy K5 Blazer 2wd '83 Chevy stepside "You get what you pay for" - Mike 'swervin ervin' Ervin |
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04-05-2013, 11:04 AM
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#6 | |
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Registered User
Join Date: Apr 2009
Location: New Freedom Pa.
Posts: 1,335
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Re: 87 tbi no start at times
Quote:
Desert |
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04-05-2013, 07:50 PM
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#7 | |
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Registered User
Join Date: Aug 2005
Location: Twin Cities, MN
Posts: 316
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Re: 87 tbi no start at times
Quote:
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