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09-03-2013, 09:11 PM
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#1 |
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Registered User
Join Date: Nov 2011
Location: Tyler Texas
Posts: 145
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75 won't start
I will start off by saying that my mechanical knowledge is limited so please bear with me. I got in my 75 today and it cranked like usual but only ran for about a second then died and wouldnt crank back up. I figured maybe the fuel pump went out but it's working fine. Checked the spark at the plugs and it's getting spark. The engine turns over just as strong as ever. So the starter is fine and it's getting fuel and spark, so now I have no idea. It has the stock 350 in it. Any help would be greatly appreciated.
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1951 Styleline Deluxe 2dr 1957 Belair 4dr 1975 Scottsdale 1979 Silverado 1987 Silverado 1987 Cutlass Supreme (For Sale) |
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09-03-2013, 09:21 PM
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#2 |
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Registered User
Join Date: Apr 2012
Location: Murphy,NC
Posts: 212
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Re: 75 won't start
Pour a little gas in the carb and try it. Could be a clogged carb filter.
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09-03-2013, 10:27 PM
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#3 |
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Registered User
Join Date: Nov 2011
Location: Tyler Texas
Posts: 145
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Re: 75 won't start
Could it still be a clogged carb filter even if I can see gas squirting into the carb?
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1951 Styleline Deluxe 2dr 1957 Belair 4dr 1975 Scottsdale 1979 Silverado 1987 Silverado 1987 Cutlass Supreme (For Sale) |
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09-03-2013, 10:34 PM
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#4 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,736
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Re: 75 won't start
If you got accelerator pump spraying then you got gas. Maybe too much gas. Hold the pedal to the floor and crank it till it starts. Might be crap in the needle/seat making it flood a bit.
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09-03-2013, 10:49 PM
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#5 | |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
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Re: 75 won't start
Quote:
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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09-03-2013, 10:49 PM
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#6 |
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Registered User
Join Date: Nov 2011
Location: Tyler Texas
Posts: 145
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Re: 75 won't start
Ok just went and held the pedal to the floor and still nothing.
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1951 Styleline Deluxe 2dr 1957 Belair 4dr 1975 Scottsdale 1979 Silverado 1987 Silverado 1987 Cutlass Supreme (For Sale) |
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09-03-2013, 11:29 PM
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#7 |
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Registered User
Join Date: Aug 2009
Location: Bowser
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Re: 75 won't start
Not even a sputter?
How long did you hold the pedal to the floor? |
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09-03-2013, 11:38 PM
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#8 |
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Registered User
Join Date: Nov 2011
Location: Tyler Texas
Posts: 145
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Re: 75 won't start
Yeah not even a sputter. I held it for a good 15-20 seconds. Multiple times.
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1951 Styleline Deluxe 2dr 1957 Belair 4dr 1975 Scottsdale 1979 Silverado 1987 Silverado 1987 Cutlass Supreme (For Sale) |
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09-03-2013, 11:48 PM
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#9 |
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Registered User
Join Date: Aug 2009
Location: Bowser
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Re: 75 won't start
Maybe the distributor is loose and the timing has retarded a bit.
Can you grab the vacuum pot and move the distributor easily? |
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09-04-2013, 12:01 AM
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#10 |
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Registered User
Join Date: Nov 2011
Location: Tyler Texas
Posts: 145
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Re: 75 won't start
I honestly don't know what a vacuum pot is. I know when it turns over, it turns over just as fast and strong as it always has.
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1951 Styleline Deluxe 2dr 1957 Belair 4dr 1975 Scottsdale 1979 Silverado 1987 Silverado 1987 Cutlass Supreme (For Sale) |
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09-04-2013, 12:10 AM
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#11 |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: 75 won't start
dry out a water bottle
poke a hole in the lid fill bottle with gas squirt some into carb try and start it Posted via Mobile Device
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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09-04-2013, 12:12 AM
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#12 | |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
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Re: 75 won't start
Quote:
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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09-04-2013, 12:18 AM
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#13 |
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Registered User
Join Date: Nov 2011
Location: Tyler Texas
Posts: 145
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Re: 75 won't start
I will put gas directly into the carb tomorrow. Maybe that will change something. I will post the results.
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1951 Styleline Deluxe 2dr 1957 Belair 4dr 1975 Scottsdale 1979 Silverado 1987 Silverado 1987 Cutlass Supreme (For Sale) |
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09-04-2013, 09:09 AM
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#14 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,736
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Re: 75 won't start
If you stroke the throttle 2 times and see fuel being sprayed inside then don't waste your time making a bottle to pour more in with. You'll have more than enough to make it start.
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09-04-2013, 12:28 PM
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#15 |
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Registered User
Join Date: Nov 2011
Location: Tyler Texas
Posts: 145
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Re: 75 won't start
Ok yeah I didn't try pouring gas in it yet but gas is definitely spraying in there.
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1951 Styleline Deluxe 2dr 1957 Belair 4dr 1975 Scottsdale 1979 Silverado 1987 Silverado 1987 Cutlass Supreme (For Sale) |
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09-04-2013, 12:47 PM
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#16 |
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Registered User
Join Date: Nov 2011
Location: Tyler Texas
Posts: 145
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Re: 75 won't start
Went ahead and poured gas into the carb for the hell of it and yeah still nothing.
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1951 Styleline Deluxe 2dr 1957 Belair 4dr 1975 Scottsdale 1979 Silverado 1987 Silverado 1987 Cutlass Supreme (For Sale) |
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09-04-2013, 06:38 PM
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#17 |
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Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,071
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Re: 75 won't start
Neutral safety switch? Not 100% sure how they prevent the vehicle from starting but I know if not in the right position, they'll do just that.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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09-04-2013, 07:30 PM
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#18 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,736
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Re: 75 won't start
Nuetral safety switch is wired between the ignition switch and the S terminal on the solenoid. If it cranks it's not the NSS.
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09-04-2013, 10:00 PM
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#19 |
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Registered User
Join Date: Dec 2010
Location: Pittsburgh, PA
Posts: 1,009
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Re: 75 won't start
My bet is timing. Definitely grab the vacuum advance and see if you can rotate the distributor.
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Steve Member of the Foot Pedal Club '83 Chevy K20: 6" Rough Country, 3" Performance Accessories BL, Bushwacker Cutouts, 38x15.50 Mickey Thompson Baja Claws, 350 HP 350 crate engine from Jegs, Turbo 400 
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09-04-2013, 10:04 PM
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#20 |
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Senior Member
Join Date: May 2004
Location: Caldwell,Tx.
Posts: 3,648
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Re: 75 won't start
The rotor in the distributor could be bad. It will break down under load and will not allow it to start. They are cheap and worth a try. Cap and rotor can be bought cheap but you may just try the rotor first.
Frank Posted via Mobile Device
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Born and proudly residing in a Red State ! |
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09-04-2013, 11:35 PM
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#21 |
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Registered User
Join Date: Nov 2011
Location: Tyler Texas
Posts: 145
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Re: 75 won't start
I'm goin to check the rotor tomorrow. Maybe I will get luck and that will be it.
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1951 Styleline Deluxe 2dr 1957 Belair 4dr 1975 Scottsdale 1979 Silverado 1987 Silverado 1987 Cutlass Supreme (For Sale) |
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09-05-2013, 06:43 PM
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#22 |
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Registered User
Join Date: Nov 2011
Location: Tyler Texas
Posts: 145
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Re: 75 won't start
Put a new rotor in the distributor. Still nothing. I noticed a little piece of metal that fell out when I took the cap off. So maybe a new distributor cap is needed?
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1951 Styleline Deluxe 2dr 1957 Belair 4dr 1975 Scottsdale 1979 Silverado 1987 Silverado 1987 Cutlass Supreme (For Sale) |
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09-05-2013, 09:08 PM
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#23 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,736
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Re: 75 won't start
Grab the vacuum advance pot and rotate the distributor about 1 inch. I'm sure it's slightly loose already.
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09-05-2013, 10:06 PM
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#24 |
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Registered User
Join Date: Nov 2011
Location: Tyler Texas
Posts: 145
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Re: 75 won't start
Should it just turn or will I need to loosen something?
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__________________
1951 Styleline Deluxe 2dr 1957 Belair 4dr 1975 Scottsdale 1979 Silverado 1987 Silverado 1987 Cutlass Supreme (For Sale) |
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09-05-2013, 10:27 PM
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#25 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,736
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Re: 75 won't start
If it won't move easily then look under the cap down by the intake manifold. You'll see the head of a bolt that is tightened on a clamp that holds the dizzy in place. Could be 1/2 or 9/16 inch bolt. Loosen it slightly to rotate the dizzy counterclockwise. Move it about 1/2 inch to 1 inch and see if it wants to start.
If it starts then tighten the bolt again. |
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