So I ended up in deeper than I wanted to be on my quadrajet and put a new kit in (cleaned everything, new float etc., explored all the passageways, etc. these are pretty neat really and the various Lars papers make a lot more sense when the carb is there in from of you on the bench)

Anyway, ran the engine, set the timing, mixtures, choke, etc.
The next day, started the car (choke and fast idle now work for the first time in ???) went to back the car out and it quit.
Started again and let it warm up, backed onto the street and it quit
Basically every time I pressed the gas it quit

Took off the air-cleaner and checked everything out, the accelerator pump was stuck about 1/2 down.
Popped the top off, removed the pump, gave it a light spray with some silicone, tried it by hand and it stuck again, pulling it out the cup came half off the piston.
Dropped the old one back in, works properly (wasn't really that bad but everything was getting changed)
The new one appears to be swollen and kind of gummy, worked fine one day, no good the next.
Searching back found an old thread from 2010, seems this was a bit of an issue, looks like it still is or I got an old kit.

Anyway, anyone have a new number that is ok? I saw that Cliff was selling updated ones but was looking for a local (Ontario) source. I was wondering if NAPA finally came around and if anyone had a number I can give them to end up with a good one (2-4055 or 2-5784 ????)

Also, the return spring (the one under the pump) seems kind of corroded, is it available separately?
Thanks
Mooser

 

Cliff is the only person I know of who guarantees the part to work in ethanol blended fuel. I just went through this exercise a couple weeks ago, but I'm going to watch this thread!

What brand kit did your accel pump come out of?

 

When my accelerator pump failed I replaced it with a NAPA 2-4055, been one year and it's still good.

 

I just bought that pump yesterday and will be putting in mine tonight. Will let you know if it's good. I also notice this pump length is different than what came with the kit I ordered. The rubber part looks the same on both though. Hopefully the 4055 is the good one.

 

Here is a quote from Cliff Ruggles

 

Thanks guys, I'll give it a try (the 4055). At least worth a few bucks to try.

Noonie.
I think that was one of the articles I was reading, Lars had started a thread back in 2010 and Cliff was nice enough to join in (interesting read that one)

Since mine failed, I just need something for "the time being" and was wondering if anyone had started using better materials in the last couple of years or not. I beleive the last post Lars made suggested some luck with the 4055.

I can see myself putting together an order to Cliff for some bits and pieces, original plan was (still is, after I'm done screwing it up) to ship the carb down to Lars for an exorcism over the winter.

Mooser

 

The quote I posted is pretty recent, from a few months ago, not from here.

 

Why would you buy a NAPA part when the experiment Cliff ran with a NAPA part failed miserably? Go online and find Cliff Ruggles' website and order one from him. Or call around to some parts stores and ask them if they can get the correct accelerator pump (for the P/N Q-jet you have) with a Viton or a flouroelastimer seal on it. If they don't know anything about what type seal their part has, just say "Thanks" and hang up. Try another store.

 

That's not good. My guess is that the replacement should be the same length.
You might want to get your carb # and ask Lars about that.

 

Even the edelbrock ones I looked up on summit's site (P/N 1982) don't tell what kind of seal they have.

It would be nice to find another source. Cliff is very good and very reliable, I just like to have more than one source for stuff. If Cliff were to decide "I'm done with Quadrajets, I'm only going to build Thermoquads from here on out", we'd be sunk.

 

The 4005 tested OK in 2010 (see message 11).

http://forums.corvetteforum.com/c3-t...post1581572167

 

Thanks Paul I didn't come across that thread, only the one from 2010 and Lars had just tried the 2-4055 on the last post or second last one.

Looks like it'll be fine, I'll just go ahead and pop it in, only takes a few minutes now that I have some confidence of getting it back together again partially correct
Mooser

 

Found it, much the same as his previous findings from the other time

Like I said, it's just a temporary measure for now. Plus, an order from the USA to up here isn't anywhere near as quick and you guys get it down there. Napa is down the road, Cliff is a week or better away and I have the patients of squirrel.

That being said, Pauls reference to Lars post from last month would appear that he's having good results with the NAPA 2-4055
One way or another I'll through a couple of bucks out and try it, in the mean time I'll likely order one from Cliff along with some other bits that are in need of help.

Mooser

 

Sorry, I missed that
It was a Hygrade kit
Mooser

 

Put the 2-4055 in this weekend and it's working fine.

 

Ordered one from Cliff today.

 

Left this open by mistake, just reminded today by another thread

Installed the NAPA 2-4055, ran the rest of the summer (a few months anyway) no issues.


Mooser

 

Whether it is or is not (methanol resistant) at least with the 24055 NAPA acknowledges the ethanol problem and represents this as the product to use to solve that problem. A different question is, how can you sell a product that is NOT methanol resistant given that 10% is the standard today? I can find ethanol-free premium, but it is hard.


Accelerator Pump w/o Spring - Methanol Resistant
Part Number: CRB 24055

 

Since all these parts are made in China, Mexico, and other foreign countries, the folks monitoring auto parts for safety/durability/etc are no longer able to do anything. The responsibility lies with the "country of manufacture", not where the parts are purchased. It's just another way that the U.S. companies who sent these parts overseas got themselves 'off the hook' for quality/safety/etc and made more money in the process.

 

I just posted this under the other thread as well:

The 2-4055 NAPA pump is a good pump, and will work as it should with current pump gas. A few notes on this, though:

The NAPA/Echlin carb kits for the 1975+ carbs (M4M integral choke) will usually have the good 2-4055 pump in them. The pre-'75 (4MV divorced choke) kits will have a blue pump, but it's not the "good" pump, and it must be replaced by a 2-4055.

But you still have to be careful: I've had several cases of the "cheap bad" blue pumps being passed off in the 2-4055 boxes. The cheap blue pumps are slightly lighter blue, and they don't have the garter spring around the inside of the pump.

Since there are so many bad pumps out there, I do the same thing Cliff does: I soak every one of my pumps in a container of pump gas for a couple of days and test it prior to use. Most of the bad pumps will actually swell up and fail within an hour: I've installed bad pumps in a carb, run the carb on the test engine, and had the carb fail before the 20-minute test run was completed.

So you have several options:

1. Buy a known-good pump from Cliff
2. Buy a NAPA 2-4055, inspect it, and test it before use
3. Use the pump out of an M4M kit, but inspect it and test it prior to use.

Lars