Today must be R-Tard Day!

[Dingfodgy]

Ok-here's the backstory. As some of you may know I picked up a '67 SWB GMC a few weeks ago and have been tinkering on it a few hours per week, trying to get it road worthy. Last weekend it came down to yankin' the points and installing a Pertronix ignition module. No worries there. At the same time I pulled off the Edelbrock 1404. cleaned out all the jets, seats, installed new gaskets & accelerator pump and ditched the manual choke setup for an electric retro-fit kit. Again, no major problems there. I had some time a couple days ago and stabbed the dizzy and re-mounted the carb. Got the engine @ #1 TDC to make sure I wasn't 180 out......everything checks out. Hit the key and pop....whir, whir whir.....pop! The SOB won't light off! I check again to make sure the dizzy is indexed correctly. I pull a plug to make sure I'm getting spark- all good there. I've now tried for 3-days to get this POS to fire and all I ever get it the popping and spitting fuel back through carb.
What's da' haps with all this? Obviously I've made a tardtastic mistake somewhere. Any advice on how to remedy my situation?

See....the timing mark is pretty close to TDC

And the Rotor is pointing slightly ahead of the #1 Wire tower.

[steelhorse]

Are you sure it on compression stroke?

[msgross]

stick you finger in the #1 spark plug hole and turn it over till it blows it out...

[LockDoc]

You need to look at your Chiltons again.... I think you are 180º out.

LockDoc

[MrBeast]

+1 for the 180 out, also have you double checked your firing order? 1-8-4-3-6-5-7-2

It is simple to check 180 out, turn the distributor around 180 degrees and try again.

[68gmsee]

What I do is to remove all of the spark plugs so the engine is easier to turn over. Then with my finger in the #1 piston spark plug hole, I use my 1/2 inch ratchet to turn the crank until I feel air pressure on my finger.

Then I know that I'm approaching TDC. I then insert a long screw driver so I can feel the top of the piston as it's coming up and keep turning the crank until the piston reaches the top.

At this point your crank pulley groove should be at TDC. Check that the rotor is pointing to #1 spark plug. If all is correct you have other problems. Ignition, valves or worn cam.

Now that all the plugs are out, it's a good time to check the compression on all the pistons.

[MrBeast]

Originally Posted by 68gmsee

What I do is to remove all of the spark plugs so the engine is easier to turn over. Then with my finger in the #1 piston spark plug hole, I use my 1/2 inch ratchet to turn the crank until I feel air pressure on my finger.

Then I know that I'm approaching TDC. I then insert a long screw driver so I can feel the top of the piston as it's coming up and keep turning the crank until the piston reaches the top.

At this point your crank pulley groove should be at TDC. Check that the rotor is pointing to #1 spark plug. If all is correct you have other problems. Ignition, valves or worn cam.

Now that all the plugs are out, it's a good time to check the compression on all the pistons.

+1 good advice.

[67_C-30]

Originally Posted by 68gmsee

Then I know that I'm approaching TDC. I then insert a long screw driver so I can feel the top of the piston as it's coming up and keep turning the crank until the piston reaches the top.

Great advice, but I'd add to this part only while turning it over BY HAND!! I know a guy that bent the valves with screwdriver because he was bumping it over with the starter. He said he had to because he was by himself! I told that was even more of a reason to turn it over by hand!

[MrBeast]

Originally Posted by 67_C-30

Great advice, but I'd add to this part only while turning it over BY HAND!! I know a guy that bent the valves with screwdriver because he was bumping it over with the starter. He said he had to because he was by himself! I told that was even more of a reason to turn it over by hand!

Yeah, that will kind of ruin your day wont it.

[dwcsr]

Point the rotor to the number one cylinder on the left side. The number one on the right side (#2) always makes mine pop. Wires go clockwise not counter clockwise like I sometimes do.

[68gmsee]

Originally Posted by 67_C-30

Great advice, but I'd add to this part only while turning it over BY HAND!! I know a guy that bent the valves with screwdriver because he was bumping it over with the starter. He said he had to because he was by himself! I told that was even more of a reason to turn it over by hand!

Good point... It would be a "tardtastic" mistake...

[silverhog01]

all above is good checking for sure!! Good luck!!! had problems with a dodge motor today not my cup of tea but above should help

[Dingfodgy]

I gotta say you guys are the coolest peeps on the planet! Thank you so much for your advice. I went out, grabbed my trouble-light, pulled the dizzy and put it back 180 off and wham-o, she came to life! Still out of time a bit, but at least she starts- I'll get her all timed up tomorrow. Normally, I would berate myself for being such a reknob, but I'm glad ya'll are here to help us less experienced guys out.....Thanks again.

Troy

[MrBeast]

Originally Posted by Dingfodgy

I gotta say you guys are the coolest peeps on the planet! Thank you so much for your advice. I went out, grabbed my trouble-light, pulled the dizzy and put it back 180 off and wham-o, she came to life! Still out of time a bit, but at least she starts- I'll get her all timed up tomorrow. Normally, I would berate myself for being such a reknob, but I'm glad ya'll are here to help us less experienced guys out.....Thanks again.

Troy

Troy, no problem man, none of us were born experts, the only reason we know what were talking about here is because we too have spent those late nights in the garage or driveway offering our beloved trucks some stunning expletives that could make a dark woman blush.

Now the next time it happens you will know what to do.

[Longhorn Man]

I haven't heard anyone say renob in YEARS!!!! There's no K in it though, I think we all know what renob is... ant it isn't bonker. LOL!!!

[LockDoc]

Originally Posted by Dingfodgy

I gotta say you guys are the coolest peeps on the planet! Thank you so much for your advice. I went out, grabbed my trouble-light, pulled the dizzy and put it back 180 off and wham-o, she came to life! Still out of time a bit, but at least she starts- I'll get her all timed up tomorrow. Normally, I would berate myself for being such a reknob, but I'm glad ya'll are here to help us less experienced guys out.....Thanks again.

Troy

Glad you got it sorted.... Next time don't wait 3 days before you post....

LockDoc