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-   -   quadrajet problems (https://www.elcaminocentral.com/showthread.php?t=46680)

Dave B. 12-17-2011 07:33 AM

quadrajet problems
Having idle problems with a 1984 El Camino 305 W/ a c.c.c quadrajet. I bought a rebuilt Carb. from Guaranteed carburetors out of Largo, Fla. I have returned carb. once & been advised carb. is fine & to check my linkage. If you start car & do`t rev. it up it idles @ 750 rpm. If you rev it up to 2000 rpm & let off it only idles down to 1200 rpm. With all linkage unhooked you can manually push on carb. & it goes to idle. With linkage hooked up ,you can bump accelerator pedal & car will idle.
Had car to my local garage & they discovered that if while car is idling @1200 rpm ,you shut car off you can see carb. relax. Seems like this would be a problem w/ vacuum holdig carb. partially open ??
I` m going to see if I have a diagram of where vacuum hoses go on carb. Anybody got any other suggestions ??

Dave B.

jarhead 12-17-2011 08:06 AM

On my 87, the arm that connects the throttle to the cruise control was sticking at the cruise diaphram. I sprayed some carb cleaner on the linkage and its cleared up for now.

CANTED 12-17-2011 08:13 AM

Does it have an A/C idle up solenoid?

Dave B. 12-17-2011 08:27 AM

quadrajet carb
Carb. has been checked w/ all linkages unhooked. Does have a/c solonoid, but had that moved aside also. Thank for replying. I` m still looking for vacuum digram, called a vacuum control information label. It`s supposed to be under hood, but after27 years it`s no longer there. anyone have one they can take a picture of ??
Dave B.

jarhead 12-17-2011 08:43 AM

my 87 still has one but not sure it would be compatible with the 84. Anyone on here know? it its the same i'll take one at lunch and post it..

Dave B. 12-17-2011 10:00 AM

quadrajet carb.
Thanks for checking. I don`t know if 87 would be the same. I found one for a 84 @ the El camino store & ordered it. They do list them for several different years though so they must be different. Hopefully diagram will help solve my problem.
Dave B.

steelybill 12-17-2011 04:02 PM

If you have cruise control, you could remove the cable from the carb & try it that way. Has to be something simple going on there......

jarhead 12-17-2011 08:28 PM

1 Attachment(s)
Attachment 1782Here's the diagram form my 87. Hope it helps

jarhead 12-17-2011 08:34 PM

Attachment 1782Here's the diagram form my 87. Hope it helps

Dave B. 12-18-2011 05:24 PM

engine topics
Thanks for the diagram, I don`t know if 87 &84 are the same. Iwill try it while I`m waiting for new one I ordered.
Dave B.

Skandolis 12-18-2011 07:33 PM

i have alldata on my laptop, and i can't print it but it shows the exact same diagram for the 84 as the one jarhead posted GL

Skandolis 12-18-2011 07:37 PM

sorry too soon not quite the same, it also has a canister control valve and purge tvs on the t circuit of the 84

Skandolis 12-18-2011 08:26 PM


sorry for the multiple posts, finally figured out how to print the image, if anybody can delete my two previous posts that would be appreciated

Daddymav 12-18-2011 09:32 PM

Do you happen to have the vacuum routing for a '79 231 V6? I'm fighting to pass emissions and I'm not sure if all my hoses are set up right.

87next2last1 12-18-2011 09:51 PM

I found this !! Hope it helps !!



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