Question about Chevrolet 1500

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I rebuilt the 350 but now can't get it to start everything is new I don't think i'm getting fire to the spark plugs. the distributor is new and I think I have it installed right.I have gas to the carb. it did backfire through the exhaust once when I was trying to start it.

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  • Samuel Charles Spriggs May 11, 2010

    Timing is off -- there are a lot of possibilities for why it's off, if you tore down the entire engine.

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I think you need to re-time the ignition--remove #1 spark plug (front plug on driver's side), place a ratchet and socket on the crankshaft bolt, stick your finger just into the plug hole, and turn the engine CW through until you feel pressure building in the cylinder. At that point, remove your finger and watch the degree marks come up on the crankshaft pulley or vibration damper as you turn slowly. When the idle firing point aligns, stop turning. Open the distributor so that you can watch either the points just start opening or the reluctor tooth just enters the stator match point while you rotate the distributor body. Tighten the distributor clamp lightly. Check that the rotor is pointing at #1 plug wire. If not, shift the wiring in the cap around until it does while maintaining firing order. The engine should run at that point. Use a timing light to get it right on later. Tighten the distributor when everything is right. Hope this gets you running!

Posted on Sep 27, 2009

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78 chevy 350 motor has no spark or power to the distributor


there has to be a wire from the coil to the distributor to the points inside the distributor
if it has points , check that they are not shorted out and that the moving point is insulated from the distributor plate
check for a condenser attached to the moving point and fixed to the distributor body
if it has an electronic system , it could be a problem igniter unit in the distributor

May 04, 2017 | 1986 Chevrolet C1500

3 Answers

I have a 1993 chev pick-up v6 4.3, i just installed new spark plugs,new plug wires, distributor cap and rotor button.All plug wires are back in the right position,and i used the firing order 1-6-5-4-3-2...


This diagram is for 1998-1995 Chevy 6 cylinder 4.3L engines.
Your got the firing order exactly correct, at 1-6-5-4-3-2, but here's the thing to double-check:
The distributor rotation is clockwise (note badly rendered arrow in picture).



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Since you probably got everything right, then you're left with really unusual/rare causes of
failure of the ignition system:
(a) rotor button misaligned/failing to make contact?
(b) rotor button not pressed onto distributor shaft far enough therefore failing to provide correct
proximity to distributor cap contacts when coil fires
(c) coil wire or contact loose/disconnected - press coil wire firmly down into distributor cap.
(d) distributor shaft of other damage caused during installation of rotor.
(e) spark plug wires defective from factory
(f) spark plugs defective from factory
(g) battery low - may need a charge to start
(h) ICM (ignition control module) failure - hook up your HEI (high energy ignition) tester, and
watch the quality of the spark on each cylinder.
(i) fuel problem? If spark is being properly delivered, its gotta be a fuel problem...
(j) distributor cap not screwed down flush to top of distributor? maybe just on one side?

Inspect the inside of the distributor cap - if there are lots of little metal bits all over the inside
of the distributor cap, then you know you have a misalignment of some type in there, and the
rotor and cap are destroying each other. normal operation will throw a quota of spark-ed off
metal bits inside the distributor cap, but since your cap is brand new, your attempts to start
the engine should have rotated the distributor so few times, you should see no metal debris.

Inspect the distributor cap contacts to see if any spark marks are more of less in the middle
of the cap's proper "contact zone". If not, you've diagnosed an internal misalignment, which
you know how to correct.

Sep 14, 2011 | Chevrolet 1500 Cars & Trucks

1 Answer

1975 chevy caprice classic convertible with 350 2bbl carb turns over but doesn't start. Carb rebuilt new plugs and wire, and cap and rotor, has spark and gas at carb


loosen your distributor have someone turn ignition while you turn distributor counter clock wise and clockwise a notch at a time see if that help good luck

Apr 26, 2011 | Chevrolet Caprice Classic Cars & Trucks

2 Answers

I have a 78 Firebird with a 350 in it. i know it has to do witht he timing but i have already done the #1 plug to the compression and lining up the timing mark on the harmonic balancer. i have also got the...


IF YOU HAVE NEW TIMING CHAIN INSTALLED TIMING MARKS 12 OCLOCK POSITION ON CRANKSHAFT SPROCKET AND CAMSHAFT SPROCKET. AND THE DISTRIBUTOR CAP ROTOR POINTING TOWARD 1 FIRING POSITION.STANDING FRONT OR CAR LOOKING AT THE DISTRIBUTOR CAP 1 FIRING POSITION ON CAP SHOULD BETWEEN THE 5 OCLOCK AND 6 OCLOCK POSITION.DO YOU HAVE 350 OLDS ENGINE OR 350 CHEVY ENGINE THERE WILL BE A DIFFERENCE BECAUSE OLDSMOBILE 350 ENGINE 1 FIRING POSITION ON DISTRIBUTOR CAP WOULD BE AT 12 OCLOCK POSITION.ONCE YOU GET ENGINE PISTON AND VALVE TIMING RIGHT YOU HAVE TO USE TIMING LIGHT AND TACHOMETER TO ADJUST THE IGNITION TIMING.

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1 Answer

My 1993 has a rebuilt 350 k motor, it will idle around 800 to 1000 rpm's the rpm guage jumps when i drive, also the truck hesitates horrible, it will run great at top end but when starting off and in...


The distributor will have white deposits on each metal tap inside cap and the rotor will be worn down. Take a look under the cap try not to disconnect the spark plug wires just unhook the cap and turn it so you can look inside. That's the easy thing to do. If the cap has the deposits you need a knew cap and rotor I would get knew wires and check your spark plugs as well.

May 30, 2010 | 1993 Chevrolet C1500

1 Answer

I am trying to start my 1980 gm 350 in my boat. engine will turn and have new fuel and filters. Pulled off coil wire and got spark, grounded a spark plug to the manifold and got spark. What could it be?...


definitely a fuel issue. be sure to check that the distributor isnt 180 degrees off. you say it'll start when you pour some fuel into the carb, it sounds like you arent getting enough fuel then. try adjusting the float level higher so that more fuel will be pumped through. and how old is the carb? has it been rebuilt recently? make sure the jets are clean and adjusted properly. make sure none of the mixture screws are bottomed out. it sounds like it's all the quadrajet's fault on this one!

Feb 16, 2010 | 1983 Chevrolet K1500

3 Answers

Replacing spark plug wires on a 1981 cadilac eldarado. I m confuse where the wires go. i need diagram for replacing the wires. Its the 8-6-4 engine


Not sure what you mean by 8-6-4 but this will help you. Pick the correct one for your application:


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GM (Cadillac) 250 (4.1L) V8 .GM (Cadillac) 273 (4.5L) V8 .GM (Oldsmobile) 307 (5.0L) V8 .GM (Oldsmobile) 350 (5.7L) V8 w/EFI.Engine firing order: 1-8-4-3-6-5-7-2 .Distributor rotation: counterclockwise


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GM (Cadillac) 368, 425, 472, 500 V8.Engine firing order: 1-5-6-3-4-2-7-8.Distributor rotation: clockwise



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GM (Cadillac) 429 V8.Engine firing order: 1-8-7-2-6-5-4-3.Distributor rotation: clockwise

Oct 06, 2009 | 1980 Cadillac Eldorado

2 Answers

Ford engine doesn't start after self tune up


Ok here is the meaning of firing order The numbers 1-5-4-2-6-3-7-8 represent the order of wish cylinder the distributor send a spark as it rotates Starting whit cylinder number 1 The distributor will have to rotor on the number 1 cylinder spark plug and the piston on the number 1 cylinder will be at the top So the fuel and air will be compressed and ignited by the spark plug. The next one will be the cylinder number 5 to do the same as the crankshaft and distributor rotate Next will be number 4 then 2 then 6 ? 7 ? 8. You get the idea "10 Degrees" The degrees represent of spark advance You may think gas explode instantly but it actually take a little time So for the explosion has maximum power when the piston reaches the top of the cylinder the distributor send the spark a little ahead of time 10 degrees of revolution is the recommended by the manufacture but that can be adjust buy losing up the distributor clap bolt and manually turn it. In order to adjust that you need a timing gun Than will flash light on the crankshaft pulley (harmonic balancer) and you will see a notch and a series of numbers than represents the timing advance Note If you have not turn the distributor by loosing to button clap bolt I recommend to live it alone and go to you local part store and get the repair manual find the firing order to see wish wire go to wish cylinder Rotate the crack shaft pulley on till the notch is on 0 and see if the distributor rotor is tours cylinder number one. Cars than don?t used distributor do that automatically and constantly adjust the ignition timing by the computer.

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