10-21-2018, 12:05 PM | #1 |
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235 won’t start
Can’t figure out why my motor only runs when it wants too. Yesterday I did the points. Condenser, spark plugs & coil. Couldn’t get it to start until I sprayed enough Ether down the barrel, then got it to idle for 20 minuets and then adjusted the carb. Shut it off a couple times and it turned on fine...... so then I took it to the gas station and then I could get it to start. A few sprays of Ether and she started back up again.
Now this morning, I tried starting it, and got nothing again. Can anyone shine some light that has knowledge on these motors, I’m learning as I go. Last edited by Isaiah92260; 10-21-2018 at 12:38 PM. |
10-21-2018, 12:37 PM | #2 |
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Re: 235 won’t start
Did you move or remove the distributor when you put the points in?
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10-21-2018, 12:52 PM | #3 | |
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Re: 235 won’t start
Quote:
I loosened a 1/2 inch bolt on the base of the distributor to advance the time but it wasn’t budging. Strange to me. |
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10-21-2018, 01:03 PM | #4 |
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Re: 235 won’t start
I also saw that there was this weird dial in the back of the distributor facing towards the flywheel side
Last edited by Isaiah92260; 10-21-2018 at 04:15 PM. |
10-21-2018, 01:12 PM | #5 |
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Re: 235 won’t start
You’re making no sense!
Take a pic. What did you set the point gap at? |
10-21-2018, 01:35 PM | #6 |
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Re: 235 won’t start
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10-21-2018, 04:28 PM | #7 |
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Re: 235 won’t start
You mentioned starting it with a shot of ether. Did it run okay then? Also, will it run if you pour a small amount of gasoline down the carb throat.
Next question: Do you have a timing light? If not see if you can borrow one. You need to start at the beginning and go from there. Once you do that you can proceed to the other possible problems like carb or fuel flow.
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10-21-2018, 05:32 PM | #8 |
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Re: 235 won’t start
My distributor
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10-21-2018, 05:34 PM | #9 | |
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Re: 235 won’t start
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10-21-2018, 05:38 PM | #10 |
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Re: 235 won’t start
Here is what my carb looks like. The valve in the top barely moves. That’s the choke right?
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10-21-2018, 05:46 PM | #11 |
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Re: 235 won’t start
yes, that's the choke. Should be almost closed when you start it cold. Not needed to start after it warms up. If it's no opening and closing when you pull the choke knob you may need to either lube the cable or find out where it's binding.
Does it run okay when it does start. No missing or sputtering.
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68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
10-21-2018, 06:24 PM | #12 |
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Re: 235 won’t start
Doesn’t look like the cable is hooked up to me.
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10-21-2018, 09:08 PM | #13 |
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Re: 235 won’t start
..
Last edited by Isaiah92260; 10-21-2018 at 09:16 PM. |
10-21-2018, 09:11 PM | #14 | |
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Re: 235 won’t start
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10-21-2018, 09:20 PM | #15 | |
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Re: 235 won’t start
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10-21-2018, 11:07 PM | #16 |
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Re: 235 won’t start
The dieseling could be the timing or it could be carbon deposits in the cylinders. My 68 with a 250 six would diesel also and I cleared it up with fuel additive every time I filled it up. I think it took three tanks full and three cans or more of Techron fuel additive to finally clear it up.
Re. choke cable. If you're sure it's not a mechanical bind, WD40 on the cable wouldn't hurt it. I'd try it. Shouldn't hurt to spray some on the carb choke shaft also.
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10-23-2018, 12:00 PM | #17 |
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Re: 235 won’t start
You should know that to PROPERLY apply the choke you should depress the accelerator pedal to disengage the idle screw from the fast idle cam steps BEFORE you pull on the cable knob or else you're binding the linkage all up & can pull the cable from it's stop.
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10-23-2018, 12:43 PM | #18 |
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Re: 235 won’t start
Another cause of dieseling is an idle speed screw turned in too much to compensate for poor idle mix adjustment or not enough idle timing. Keeps the throttle plate too open.
Sometimes it is easier to lube a choke cable if you take it loose from the carb, get it as straight as possible, then work it back and forth. Might spray some carb cleaner on the choke parts on the carb, they might be gummed up. Don't trust the timing mark to be accurate. The balancer ring might have shifted. A PO might have installed the timing tab in the wrong place. |
10-23-2018, 12:52 PM | #19 |
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Re: 235 won’t start
Oh okay, so before I crank it, press and hold the gas pedal, pull the choke and then start the motor?
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10-23-2018, 12:58 PM | #20 | |
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Re: 235 won’t start
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10-23-2018, 01:03 PM | #21 | |
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Re: 235 won’t start
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