Question about 1983 Oldsmobile Cutlass Supreme

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83 cutlass supreme with 305 no start

I did a cam lifters an timing job i line up timing marks with #1 piston tdc on compression stroke set distributor to number on piston but no start it act likes it wont to start but dont it backfires out exhaust. could my carb be the reason its not starting cause when i pull the throttle it slow down the cranking

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There's a chance the cam and crank gears are not in line with each other. You could try placing the rotor 180 degrees from TDC and see how it does.

Posted on Dec 07, 2012

  • brandon lee Dec 07, 2012

    I've check plenty of times and they are line up

  • John Doe Dec 07, 2012

    I no one one of my so called frieinds when i was with him his 81 chevy sierra started back fireing around 55 mph , end was getting worse as we nurse it back to my place, Buy the time we pulled into the parking lot where i was living to make a long story short the truck died, Right when he pulled in, Here it was the control module that was shot, Because we tried starting the truck up before we put the new one in it would not start , Evan though we check it for spark end it was getting ,spark , The minute we put tnhe new one in , End tried it , It fired right up. Like a brand new vehicle,


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Are you shure you got the spark plug wires back on in the right order?

Posted on Dec 07, 2012

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  • brandon lee Dec 07, 2012

    Yelp there in order

  • John Doe Dec 07, 2012

    I am pulling out my hair here guy trying to figure out why it will not start, I really don,t think the carb could have to do with the problem your haveing with it, For the hell of it try a different control mudule end distributer cap if you can get your hands on them, Evan from a auto wrecker,

  • brandon lee Dec 07, 2012

    I thought bout that but it's getting enough fire


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  • 2 Answers

Is the fire order the same on a oldmo

Posted on Apr 12, 2016

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Posted on Jan 02, 2017

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SOURCE: disturbed timing...need info on resetting non-adjustable timing.

Sounds like your off just one tooth, try pulling up dist. and back it up one tooth( counter clockwise) and try it again. When you reinstall the dist. it always goes in just before #1 not right on #1. Your in the ball park.

Posted on Jun 03, 2009

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SOURCE: cant find timing marks on camshaft sprockets on 91


Posted on Jan 23, 2010

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SOURCE: 1994 oldsmobile cutlass supreme wont start.

or also this link:

Posted on Jan 29, 2010

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SOURCE: change the distributor cap and rotor now car wont start

We did the same thing with ours. We have a 1985 Cutlass Supreme that we put a 350 Camaro engine in it. At first it would not start for anything we eventually had to take it to a mechanic and he said it was the timing and he fixed it. Now it runs great!
But yeah it is almost impossible to get chevy engine in a oldmobile if you are unsure of what you are doing.

Posted on Jun 18, 2010

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SOURCE: I have a 96 oldsmobile cutlass supreme sl wont start

Could be the security. You can either bypass it yourself or get a bypass module. The wires in the ignition switch are horrible about breaking from being turned over so much through the years. You can also by a new switch. I'd go through the proper diagnosing steps for this but more than likely that's your problem.

Posted on Dec 06, 2010

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How do I refit the distributor on a 5 cyl 2.5i m/bus and make sure the timing is correct

The tdc needs to be on (compression stroke)you can use a compression gauge to judge compression stroke.or the old school way I do is take out #1 plug and put finger over plug hole in head,let someone bump the starter until the compression blows your finger away from hole. Roll engine by hand.(socket and breaker bar on crank bolt if needed) slowly clockwise to Line up marks. Install distributer with button pointing toward #1 prong in cap.

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I replaced my whole distributer in my 1992 2.8 liter v-6 s-10 but my son washed off the alignment marks, so I was wanderind how i can time it? please help!!!

If you know the engine's number one cylinder location, you need to put it at TDC of the compression stroke, then you lower the distributor in so that the rotor ends up pointing to the #1 spark plug wire tower on the distributor cap. As you drop it down, the gear on the dist. shaft will mesh with another gear and turn slightly. You want it ending up pointing directly to #1. Get it seated, then you can start the engine and set the timing according to specs with a timing light.

To find TDC of the compression stroke (as opposed to TDC of the exhaust stroke), pull the #1 spark plug out. Put a socket and wrench on the crankshaft pulley and turn it in its normal direction (clockwise), with your finger over the spark plug hole. As the number one piston is rising on its compression stroke, you can feel the pressure build up under your finger. You won't feel any pressure as the piston rises on the exhaust stroke, only on the compression stroke. So when you feel pressure, you know the piston is rising on its compression stroke, and you can turn the crank on around until the piston is at top of its travel-the notch on the crank pulley will now line up with the zero degrees mark on the pointer scale beside the pulley. There, TDC of compression stroke. Now drop in the distributor so the rotor tip lines up with the #1 spark plug tower on the dist. cap.

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Okay, you have to set the number 1 cylinder at TDC of its
compression stroke, and then drop in the distributor so the rotor is pointing to the #1 spark plug wire tower. This should start the car, then you could set the timing to spec with a timing light.

There are two TDC's of a cylinder- the compression stroke and the exhaust stroke. To find the compression stroke, take out the #1 cylinder spark plug. Put your finger over the hole. Now either turn the engine over by hand (with a socket on the crankshaft pulley-turn clockwise), OR have a helper bump the starter over in as short bursts as possible. As soon as you feel pressure on your finger- stop turning- the piston in #1 is rising on its compression stroke. Now check the timing pointer or scale by the crank pulley. Turn the engine slowly on over until the notch or mark on the crank pulley is right on the zero degrees mark on the scale. This is TDC of compression stroke-the piston is at top of travel in the cylinder. Put the distributor in so the rotor will be pointing to the #1 spark plug wire.

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Did you install the belt with the number one piston on the compression stroke and have the distributor pointed at the number 1 plug connector wire. If so, you must of missed the belt placement by one tooth. If everything was correct like you mentioned it should of started. So, you made a small mistake that you will have to check again where, Im sorry :.(

Number 1 piston on the TDC of it's compression stroke, distributor pointed at the number 1 plug wire.
When on the compression stroke, the valve rockers on that piston will be relaxed (sealed) and the rockers will have play in them at that setting. Both rockers, intake and exhaust on number 1 will be loose when on the compression stroke of that piston.

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No different than setting one that turns clockwise. You set it in so the rotor on the distributor shaft lines up with the number 1 cylinder spark plug tower on the distributor cap, and then you follow the firing order around in a counter clockwise direction.
This will get the distributor set right, as long as you have the number one cylinder at Top Dead Center of the compression stroke before you drop the distributor in.
To find TDC of compression stroke, pull the number one spark plug. Turn the engine over by hand with a socket on the crank pulley-turn it clockwise-or you can have someone bump the starter over in short bursts. With your finger over the spark plug hole, turn the crank over until you feel air pressure build up in the cylinder. Now look at the timing pointer scale next to the crank pulley. Keep turning the crank until the notch or mark on the crank pulley lines up with the zero degrees mark on the pointer scale. The air pressure behind your finger tells you that you are on the compression stroke. When the crank pulley notch lines up, you are at TDC of the compression stroke. The piston will be at the top of its travel. Now you can drop in the distributor. Keep playing with it until you have the rotor pointing directly to the number 1 spark plug tower. The shaft will turn a little as it is dropped in, so you start with the rotor a little ways back from directly to number 1.

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Looking for timing marks for a 3.1

set the ff:
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Still need advice

Turn crank so that timing mark on front pulley is at 0 degrees.
Remove the timing cover and you should see a mark for the cam to line up with.
You want the cam lobes on No.1 cylinder to be pointing away from the followers wether they be rockers above cam or buckets below. This will be the compression stroke.
Once the cam timing is set you can recheck the distributor. It should point to No.1.

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