Dust on the intake could cause an imbalance in the engine compartment. Better get to cleaning and start driving right away!

I have this problem also when starting it in the morning, just keep the a little bit of gas on it for about 30 seconds - minute and it is fine. My engine is pretty much brand new, 600 miles. Could it be the cam I have? It is more aggressive than stock. A friend of mine has a similar setup engine, and he has to do the same thing.

Kinda doubt it there, Jetlag. My 350 is also running a longer duration cam underneath a Weiand Stealth intake and a 1406-series Edelbrock 600CFM Performer carb. Has that gentle "lope" at idle.

I had the exact same cold-start problems that you guys are experiencing until I got the choke and the fast idle set correctly. The mechanical beauty of the Edelbrock is its simplicity - which can hardly be said of the old Q-jets. The choke coil is on the right, the only two idle screws are on the left, metering valves on the front. And a glorious absence of dangling linkages. Easy, easy, easy/

With the modified cam you MIGHT have to feed it a little more (enrich the mixture a tad) to get her to do right.

Good luck.

John

Agreeded, adjustments should do it. And the Q-jet is really very easy to set once you know what to do. Maybe this weekend I might get to mine, if the weather holds. It should be warm.

Like Scot, I've just come to accept that cold cold starts require a little extra play with the right foot to keep the RPM's around 1500. I usually need 2-3 minutes or so before she's warm enough to hold a grumbly idle at 600 completely on her own. In warmer summer weather, it really never seems to be a problem. My feeling is that I run too great a risk of screwing up the carb settings if I mess with it to deal with the minor inconvenience of cold starting.

~ Joe

This cold weather carburetor setting questions have me wondering if I've been doing it all wrong. The last carburetor car I owned was back in 76 (74 charger)so I don't recall what I did to set the choke. I pump the accelerator several times, the turn the key...starts right up to a fast idle, then after she warms up I tap the accelerator again. I'll have to try the set once than start method.

for diagrams of your carb.. (assuming it is stock quadrajunk)

goto www.carbs.net

they have a plethora of useful information about serial number decoding, parts, diagrams, etc..


heres the link to decode your serial number
http://www.carbs.net/quadnumber.htm

and an exploded view of the 4mv
http://www.carbs.net/diags/4mv.jpg

I have my Q-jet rebuilt and working quite well. I have many pictures. Give me just bit more time to put it in a document to send out. It will answer many question. I can send some disc out, but will need to find a place to post it as well. However, I want it to be free for anyone in C3VR, others I want to pay. I don't yet know how large the file will be.

please do, maybe ill practice on one of the two 69 vette 4mv quadrajunks I have in the shed..

hell i have three.. im running another one on my 80 chev 4x4

and it needs a rebuild... it's secondaries dont work..