carb troubles

sweet E mocean · Post by **sweet E mocean** » Wed May 20, 2009 9:28 am

Hey guys
I just replaced the original carter with a new edelbrock on a 360 chrysler and now when i throttle down it stays @1200 rmp and i have to kick it down by reving it slightly a phew times and then it wiil go down to 900 rmp until i put in gear and then it will drop to 500 rpm . does anybody else evr seen this with edelbrocks

jwrape · Post by **jwrape** » Wed May 20, 2009 9:42 am

sweet E mocean wrote:Hey guys
I just replaced the original carter with a new edelbrock on a 360 chrysler and now when i throttle down it stays @1200 rmp and i have to kick it down by reving it slightly a phew times and then it wiil go down to 900 rmp until i put in gear and then it will drop to 500 rpm . does anybody else evr seen this with edelbrocks

I have Edelbrocks and my Starboard side sticks a little. I have to rev it up and pull it down fast to get it to return. It's just something I have learned to deal with.

guglielmo6160 · Post by **guglielmo6160** » Wed May 20, 2009 12:01 pm

I know this sounds dumb but, make sure the return spring is taught enough and that the linkage returns to idle , ya never know

jwrape · Post by **jwrape** » Wed May 20, 2009 12:03 pm

guglielmo6160 wrote:I know this sounds dumb but, make sure the return spring is taught enough and that the linkage returns to idle , ya never know

Yea, it's on there but I thought about buying a stronger one.

prowlersfish · Post by **prowlersfish** » Wed May 20, 2009 9:31 pm

Make sure your cable is ajusted right and that the choke is opening fully

jwrape · Post by **jwrape** » Thu May 21, 2009 6:48 am

prowlersfish wrote:Make sure your cable is ajusted right and that the choke is opening fully

Choke is disconnected. Just pump the gas two ro three times and it starts right up

rossjo · Post by **rossjo** » Thu May 28, 2009 11:12 pm

Qjet?

jwrape · Post by **jwrape** » Fri May 29, 2009 6:34 am

rossjo wrote:Qjet?

Yep

rossjo · Post by **rossjo** » Fri May 29, 2009 9:23 am

Bills is right ... check to make sure the return springs (2 ea for safety, both stainless) are "strong" enough.

Make sure the needles are resetting back into their seats ... this is the biggest issue I've had with Qjets ... I used to have a ratchet at hand to pop the top up on my 72 Chevelle SS to re-seat the needles when they occasionally stuck ...

When it "hangs" at 1200 RPM, and you look at the linkages, baffle, throttle position, and then goose it, what change do you see? Something is simply hanging ...

Finally - is this a Marine Edelbrock? Make sure it is, because automotive Qjets vent openly, and let gas fumes go out below the car, but in a boat, they end up in the bilge - and lead to fires. Auto carbs can be modified for marine use, but one should NEVER use an automotive carb in a boat!

prowlersfish · Post by **prowlersfish** » Fri May 29, 2009 1:11 pm

If its a Edelbrock in can't be a Q-jet

rossjo · Post by **rossjo** » Sat May 30, 2009 7:23 am

Actually, GM quit making Qjets several years ago. Edelbrock makes them now ...

http://www.carburetion.com/Rochester.asp

Here is your manual:
http://www.edelbrock.com/automotive_new ... manual.pdf

JW - Make SURE its a Marine Edelbrock Qjet model 1409 (600CFM Qjet) or 1410 (750CFM Qjet) :
http://www.edelbrock.com/automotive_new ... 0/1402.pdf

The marine model has:

1) Marine Fuel Inlet (3/8" Inverted Flare Fitting)
2) Marine Fuel Pump Vent
3) NO Power Brake Vacuum Port (on lower rear). If there is a hole there, it must be plugged with a 1/4" Brass Pipe plug.

prowlersfish · Post by **prowlersfish** » Sat May 30, 2009 7:35 am

looks like nobody makes them anymore . lI guess Edelbrock bought the rights from Rochester to make them then stoped .( look at your link )

rossjo · Post by **rossjo** » Sat May 30, 2009 8:14 am

GM's Rochester Products Division, Weber (under contract at later dates) and Carter (mid 70's contractor - the Carter carb was made for years in North St. Louis, MO, about 3 miles from the Corvette plant) no longer make the "Rochester" Quadrajet.

Edelbrock still sells them ...
http://www.edelbrock.com/automotive_new ... rine.shtml

prowlersfish · Post by **prowlersfish** » Sat May 30, 2009 11:39 am

Ross read yout link Q jet no longer is made " Production has been stopped"

rossjo · Post by **rossjo** » Sat May 30, 2009 3:22 pm

Paul - you stated, "If its a Edelbrock in can't be a Q-jet".

But Edelbrock did make Qjet Marine carbs ... the 750CFM #1901 ...

Apparently they don't make them any more, so JW should be SURE of what he has ...
1) If its a Qjet, read the manual and possibly put in a rebuild kit and tighter return springs,
2) If its a Edelbrock Square-bore, thats a whole different story,
3) If its not a marine carb (no matter WHAT type), then its a fire hazard!
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