Edelbrock 1406 drama

[sgtpoliteness]

So, I had developed a pretty bad bog upon initial tip in with the Cherokee. I pulled the carb off, looked it over and found I was getting little to no fuel from the shooter. I pulled the top off, reset the float level, cleaned up and found the shooter nozzles were plugged.

I cleaned it up, put it all back together and placed it back on the engine. Fired right off, but now I can't see any fuel from the shooter. I replaced the accelerator pump, still no fuel. What's weird is that OFF the car the shooter works awesome, but when it's back on nothing. Bad gasket causing a vacuum leak? I'm a Holley guy so I was wondering if anyone else had this problem.

I DID throw the Holley 4160 off my '70 Galaxie on it and it runs awesome now, so I know it's a 90% carb problem.

Thanks for your help!

[Stuka]

1406's are really very simple carbs.

With the engine off, when you pull the throttle back, no fuel squirts in the primaries?

Only a few things that can cause that. Bad plunger, linkage is disconnected or misadjusted, plugged squirters, or the accel pumps are not getting fuel themselves.


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[sgtpoliteness]

Well, I didn't check engine off, carb on but I assume that works since they function with the carb off the car sitting on my work bench.

[sgtpoliteness]

To clarify, engine running - no fuel from the squirters.

I'm going to take it back apart and replace the seals. I'm sure I've got some kind of vacuum leak.

[Stuka]

Squirts can be hard to see when the engine is running as the fuel can atomize pretty quick.


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[sgtpoliteness]

Ahhh, I bet you're right.

That bog is insane. If I'm not real gentle with the accelerator, the engine dies. With the Holley, no problems.

[stumblinman]

Sounds kinda like mine when I got it. It was rebuilt but the PO scrapped the gaskets off but didn't clean out the scrappings good enough and they clogged up the jets. It would idle all day until you hit the accelerator then cough.

[Gumby]

I am having similar issues with mine but only when in gear. Idle is a little high but that is as good as I can get it at the moment. When sitting and running it revs pretty good with no stumble but put it in gear and you are in for it then.

[sgtpoliteness]

Hmmm, vacuum leak? That might explain the high idle...

[Stuka]

I am having similar issues with mine but only when in gear. Idle is a little high but that is as good as I can get it at the moment. When sitting and running it revs pretty good with no stumble but put it in gear and you are in for it then.

Sounds like a vacuum leak. Get some brake clean or the like and spray it around gasket surfaces while the engine is running. Mostly the carb base gasket and any vacuum lines. If your idles climbs when doing this, thats your leak.

[sgtpoliteness]

Ok, update. Monday night it ran great with the Holley, Tuesday morning it started up and then died. I didn't have time to mess with it until last might. Found the Holley plugged up really bad. I pulled the primary bowl off and blew the needle and seat out, some air movement now, the secondary is still plugged.

Also, the pretty new mechanical fuel pump is pulling around 15" of vacuum on the inlet side. I hooked up my hand held vacuum pump to the delivery hose from the tank and pulled fuel up pretty quick. I crawled around under it looking for cracks or leaks in the lines (I had a similar issue to this on a '79 Fiat and there was a pin hole in a fuel line).

Also, I went ahead and pulled apart the Edelbrock at work, replaced the seals and needles and seats. I also blew out the passages. Nothing should be plugged or stuck now.

Oh, yeah. It fired right up (well, after getting some fuel in the bowl) after blowing out the primary side. Attempting to duplicate the same problem the Holley is now doing what the Edelbrock was doing - quick throttle snap, and it either nearly or does die. Timing is @ 14* initial, and I had previous confirmed the advance is functioning.

[carnuck]

Sounds like you got a load of crap in your fuel tank.

[ClovisMan]

Didja accidentally fill up with this hose:


Instead of this hose:

[sgtpoliteness]

Possible, I drove around for at least a week on the same tank. I'm changing the filters out tonight.

[stumblinman]

I dunno the exact science behind it but I thought you advanced timing about 1 degree per 1000 ft above sea level. I'm regularly at 7K -6K and my initial timing is set at 20 with vacuum bringin it up to 38. Once setup like this I felt like I had better snap in the pedal. I hope it's not just in my head

[sgtpoliteness]

I'm at around 5400' and I think factory is 8*? I'll have to check. It doesn't feel like a timing issue though. I advanced it from 8-9* to 14* and ran fine for a couple days. I'll have some time this weekend to mess with it.

[sgtpoliteness]

It's also got a MSD box on it.

[lindel]

Since you mentioned the MSD, check your spark plugs. The reason I say this, I had a Jacobs system on a 79 Cherokee that would run great, right up until the plugs were totally wasted.

I won't bore you with my opinion of Edelbrock carbs.

[sgtpoliteness]

Thanks, I'll do that!

[stumblinman]

honestly.... with the progressive crap you are getting with other carbs and all, you should look at your fuel source. i.le. tank mucked up, filter clogged, ethanol eating up everything you hVE in your fuel system..... I'm having probs here with the crazy 15%+ ethanol colorado thinks is good,....... bastards well that's another thread