eldebrock q-jet problem

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May 9, 2006 | 10:37 PM

RLS

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From: SW Oklahoma

eldebrock q-jet problem

The vac. secondaries do not seem to open properly. It seems to have too much vacum pull on the vac. pulloff. They open real slow. I do not see any adjustment on this. I know on a GM Q-jet you can change pull offs and adjust the spring up by the secondaries, but I do not believe that it needs adjustment up there. It seems to be a overly restirctive pull off. Any suggestions? Oh, it is on a 350 chevy with headers and a performer carb.

May 10, 2006 | 07:17 AM

Kalway

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From: San Diego CA

Edelbrock model #190x? A problem we found with my Edelbrock 1904 is that the air valve was too tight. Hopefully lars will chime in and explain how to resolve that problem.

May 10, 2006 | 05:40 PM

Iskenderian

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From: Fort Drum New York

Havent had that problem with my Edelbrock Q, but the thing does leak. Out of somewhere. NO idea where.

It seems to be the same problem Q's have had for decades. No complaints about the carb other than that. runs like a dream. has anyone heard how to fix? I cant really send it back, due to being on the other side of the earth from my car

If someone has a good cheap fix feel free to PM me please

Robert

May 10, 2006 | 05:47 PM

RLS

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From: SW Oklahoma

AIr valve? The part I am talking about is a canister that sets on the lower left (looking from front of carb) that has a vacum line to it from the carb. It pulls the choke off and control the opening of the secondaries. I think it real real slow reacting due to the vacum on it. There has to be a tuning ability.

May 10, 2006 | 08:15 PM

olescarb

Racer

Joined: Apr 2006

Posts: 477

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From: Millbrae California

there is a delay valve/vacuum restriction built into the choke break, if the tube goes straight into the choke break (not a formed/bent tube) you can enlarge the restriction a few thousands of a inch at a time with drills from a #'s (real small) drill set to make the upper valve open quicker

May 11, 2006 | 09:28 PM

RLS

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From: SW Oklahoma

Well of course it is bent, that has been how my stinking day has gone! At least my 77 ran well so all is not lost.

May 11, 2006 | 11:21 PM

DaveL82

Drifting

Joined: Jul 1999

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From: Plano TX

I have the edelbrock q-ject on my ZZ4. This is the emissions carb for an 80 with electric choke and port for float bowl to cannister.

The vacuum break opened fine however I did have to loosen up the spring on the secondary flaps. Just had to loose the allen set screw and take a 1/4 turn out of the spring.

May 12, 2006 | 10:35 AM

lars

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From: At my Bar drinking and wrenching in Lafayette Colorado

RLS -
Take a long vacuum hose and hook it up to the choke pulloff (the "vacuum canister"). Suck on it until the pulloff fully retracts and then release the suction. If the pulloff fully extends in less than 3 seconds, it's working fine. If it's slower than that, you either have a defective pulloff, or the air restrictor oriface inside is too small. You can drill this out as Henry described above. If there is no restrictor hole visible in the vacuum nipple and it extends in more than 3 seconds, replace the pulloff.