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Author Topic: 1994 4.3  (Read 3804 times)

Offline 75 C20

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1994 4.3
« on: January 26, 2008, 09:57:17 pm »
my brothers 94 WT with a 4.3 quit on him while he was driving down the road. my originally thought was lack of fuel . its getting gas but it has no spark.
i wont start up-no spark- i was thinking ignition coil.  i haven't got to take the cap off yet but i thought id get your guys thoughts on this.
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1975 Custom Deluxe 20 350 SM465 2WD Longbed
1979 Custom Deluxe 20 400 SM465 2WD Longbed
1968 Custom Sport Truck 20 327 TH400 2WD Longbed
1985 Silverado 10 305 700R4 2WD Longbed
1969 Pontiac GTO 400 Turbo350
2008 GMC 2500HD 6.0 6spd 4X4 Longbed

Offline choptop

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Re: 1994 4.3
« Reply #1 on: January 26, 2008, 10:18:29 pm »
quick way to test spark to dist. is to pull coil wire and crank over engine. I highly recommed doing this with a spark tester like ones used to check fire to spark plugs. If you don't have one, inserting a screwdriver in one end and the placing next to the block will work. DONT HOLD ON TO THE SCREW DRIVER< AND MAKE SURE THERE ISNT ANY FUEL ON THE INTAKE. It will hurt. Use clean rags or such to hold the screw driver shank off of the block about 1/16 to 1/8 inch. This should allow you to see the spark. I am not familiar with the engines, but if they are equipped with a crank sensor, this can be an issue as well, but I don't thin k they have one
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Offline Fordeatinz71

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Re: 1994 4.3
« Reply #2 on: January 27, 2008, 11:04:13 am »
ignition module...right under the distributor cap...with two plugs coming out of it...
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1991 Chevy Silverado K1500 ECSB, 350, 700R4 w/shift kit, 3.42's, exhaust work...
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Offline choptop

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Re: 1994 4.3
« Reply #3 on: January 27, 2008, 01:19:48 pm »
Totally agree. That would be the next step and is not uncommon. Very good point, I forgot about it
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76 C10 Choptop,76 C10 Swb
85 C10, 85 K10, 85 K20,86 C10,86 K10 (all extended cabs)
86 C30 extended crewcab

Offline 75 C20

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Re: 1994 4.3
« Reply #4 on: January 27, 2008, 05:28:24 pm »
got it figured out- was  a lose connection on a wire
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1975 Custom Deluxe 20 350 SM465 2WD Longbed
1979 Custom Deluxe 20 400 SM465 2WD Longbed
1968 Custom Sport Truck 20 327 TH400 2WD Longbed
1985 Silverado 10 305 700R4 2WD Longbed
1969 Pontiac GTO 400 Turbo350
2008 GMC 2500HD 6.0 6spd 4X4 Longbed

Offline VileZambonie

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Re: 1994 4.3
« Reply #5 on: January 27, 2008, 05:31:20 pm »
1st step in trouble shooting is trouble shooting not parts changing. Glad you fixed it.
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