Edelbrock 1405 carb running rich

[iamtherealJayy]

I’m not sure if it was 180 off… I cranked the truck and it backfired. It never started. Could that be timing or it’s 180 off now?

 

[Bextreme04]

I’m not sure if it was 180 off… I cranked the truck and it backfired. It never started. Could that be timing or it’s 180 off now?

I'm confused by your comment on it being between 8 and 4 after you swapped it 180 degrees. You need to get it to mechanical TDC on #1. That means you rotate motor until you feel pressure on your finger at #1 cylinder. Then get engine timing mark at 0. Then stick distributor with rotor pointed at #1. Then reassemble everything and try to start motor. Once it gets started, move distributor slowly with vacuum advance disconnected until you get the timing set to 8-12 BTDC. Use a timing light. You can be 10-30 degrees off in either direction just sticking the distributor in by hand and eyeballing it.

 

[iamtherealJayy]

Rotating the distributor it wouldn’t drop back in until between 8 and 4 on the cap. I can retry everything. I assumed a little bit past #1 on the cap was fine since I bumped it with the key instead of turning by hand.

 

[iamtherealJayy]

Is there a way to rotate the oil pump shaft ? If the distributor is off a few teeth? I turned it 180 and now it won’t start, it wouldn’t drop in completely any where else I tried to get it towards one but it dropped in pointing towards 8/4 on the cap.

 

[Curt]

All the info you need is on YouTube.MSD has a very in-depth how to on gm hei distributors.How to find TDC,what to do in your current situation off your oil pump needing to line up.

Good luck

 

[iamtherealJayy]

Okay compression #1 turned by hand until at the biggest V on the tab, the rotor is pointing towards the brake master cylinder. The distrivutor can only drop down in two spots. Here and 180. I rotated it back 180 and rotated the spark plug wires once counter clockwise like you suggested.
Edit, still not running but did start but backfired.

 

[iamtherealJayy]

@Curt more info on that video? I can’t find one, I’ll watch one if I can find one. But tdc on number one the rotor isn’t pointing towards 1. So is that timing chain slipped teeth? Or is it something I’m doing wrong?

 

[Curt]

MSD channel

 

[iamtherealJayy]

I was searching msd gm hei and nothing other that showing the distributors they had to offer came up

 

[Curt]

https://m.youtube.com/channel/UCIk6bEfFi5bCmld_sS4Z7Dw

 

[iamtherealJayy]

So based off watching several videos I have now confused myself. I thought left on the tab was advanced and to the right was retarded, but according to these videos I’ve been doing it wrong all along? So my timing would have been like 20° retarded? When I’d rotated the distributor 180 and dropped back in I had it as far advanced as it would turn, and spark plug wires moved two places counter clockwise from where it started to get the engine to start. If the timing tab is left of 0 is retarded and to the right of 0 is advanced why is 0 at the end and only retarded available? I’m quite confused currently.

 

[iamtherealJayy]

Okay to correct my last statement, I realize they used the timing tape on harmonic balancer. My confusion is sort of resolved. But now I’m still confused on why the engine won’t run.

 

[iamtherealJayy]

Based off watching a few more videos, I’m thinking turn the oil pump drive shaft to a 5/11 o clock position and drop the distributor in so it points forward. Basically completely redo everything, pretend engine never ran never had a distributor. Tdc, oil pump shaft to 5/11, point rotor at second bolt from back on intake manifold and it should drop it and fall straight to pointing at the first cylinder, in theory. Hopefully after that just verify firing order and reset it back how I originally had the plug wires so it’s not rotated one anymore. Maybe then the engine will run? If it starts but still doesn’t run I’m going to put a different carb on and call it good. The edelbrock was supposed to be a simple change to help the truck but I’ve ran in circles for several months now trying to get this thing going good enough to drive.

 

[potent rodent]

your rotor cap needs to be pointed at num 1 plug and the vac advance can pointed some were in the area of num 6 plug

 

[potent rodent]

iv used that 11 and 5 oclock with the oil pump shaft and it works very well, keep your vac can pointing to num 6 plug and rotor cap at num 1