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-   -   83 buick 231v6 with Rochester dualjet (http://www.hotrodders.com/forum/83-buick-231v6-rochester-dualjet-221958.html)

83 cutlass 07-21-2012 01:39 PM

83 buick 231v6 with Rochester dualjet
 
Guys i got old carburetor rebuilt but i had to remove all vacumn lines in my haste i didnt mark the vacuum lines i took pictures well the pictures arent quite clear enough does anyone know how these lines are to be setup i have no smog pump i deleted this due to no catalytic converter this is legal in ohio and transmission is a th350 does anyone know where i can find a clear diagram This is my first electronic carb rebuild also after carb was rebuilt due to it spewing fuel allover the engine im having major throttle delay at any point of acceleration heavier than quarter throttle and engime stalls when stopped uphill unless throttle is slightly held open im thinking either misadjusted electric choke or bad vacuum line setup help guys please not alotta information on the vacuum lines online

LATECH 07-21-2012 02:31 PM

Do you have a scanner hooked up to see what is going on?
Is the check engine light on?

83 cutlass 07-21-2012 04:35 PM

No the check engine light has been doing this since as well mind you this is a rear whleel drive cutlass turn the engine over thw light fashes and ends with the same code then stops flashing until key is tuned back and engine resarted then repeats and when driving no also i believe oil pump is worn out low oil pressure at ligh
tz by light and guage

83 cutlass 07-21-2012 04:40 PM

Also its throttle response worsens after thermostat opens

LATECH 07-21-2012 08:43 PM

What code does it flash?

83 cutlass 07-22-2012 12:15 PM

It flashes 13 twice then no longer flashes until car is restared ive never seen this before also after flashing stops carb clicks heavily for a few seconds and stops until throttle is reopened could tps be bad also fast idle for ac i dont believe is functioning my ac doesnt funtion anyway but im at a loss on ths carb was proffesionally rebuilt by national carbs supposedly live engine tuned i believe its carb i dont think it ignition because revs fine out of gear in gear it fa
lls flat on face

LATECH 07-22-2012 12:44 PM

Quote:

Originally Posted by 83 cutlass (Post 1576011)
It flashes 13 twice then no longer flashes until car is restared ive never seen this before also after flashing stops carb clicks heavily for a few seconds and stops until throttle is reopened could tps be bad also fast idle for ac i dont believe is functioning my ac doesnt funtion anyway but im at a loss on ths carb was proffesionally rebuilt by national carbs supposedly live engine tuned i believe its carb i dont think it ignition because revs fine out of gear in gear it fa
lls flat on face

Code 13 is an oxygen sensor problem, either the sensor or the wiring to it.
The carb will"click" for about 30 seconds when first turning on the key. It is normal. It is the Mixture solenoid cycling on and off.The computer is doing that, it helps engine on start up.
Vacuum hoses arent going to cause your problem, unless they are leaking. Plugging them wont change much.
The MAP sensor though, ...has to have manifold vacuum, and if it is unhooked the car will run rich and without much timing.
Check the MAP sensor to be sure it is hooked up.
Plug the EGR hose for the time being to eliminate it from the loop.
Verify base timing.
I have a hunch the float level may be too low also. How did you set it?

83 cutlass 07-22-2012 01:14 PM

I personally did not rebuild the carb i sent it out to be rebuilt i did make the final adjustment also im confused on the map sensor ive been to ld this engine doesnt have one by my local parts stores

LATECH 07-22-2012 01:20 PM

It could be built into the Computer.
Look athe wiring harness for the engine sensors. There could be a tiny vacuum hose in it. That will go to the computer as the sensor could be built in. Those early years were a formative bunch for GM as they didnt have it all together, so it can be a guessing game.
Most of the time the sensor is underhood.Many years they were mounted on the air cleaner housing

83 cutlass 07-22-2012 01:32 PM

Will check into that in a few moments rockauto does show one with an electrical socket
I appreciate the ideas latech

LATECH 07-22-2012 01:32 PM

Youre welcome. Good luck.:thumbup:

83 cutlass 07-22-2012 01:43 PM

I found the map sensor its on air cleaner the tubing looks good my question is how to check it

83 cutlass 07-22-2012 01:47 PM

Also how do yoh adjust the float in the carb not sure about this setup i may just go vacuum advanced and 450 cfm 4 barrel with mechanic secondaries

LATECH 07-22-2012 01:56 PM

Quote:

Originally Posted by 83 cutlass (Post 1576061)
I found the map sensor its on air cleaner the tubing looks good my question is how to check it

If its hooked up, and in place, plugged in and all, its probably OK.
You could check for trouble codes. If it has a problem it will display a code 33.
You can, if you want, unplug it while the engine is running. It should make it run worse. That would indicate that it is probably working.
just remember unplugging it while running will set a code 33.
Look here for more info on T codes.
http://www.troublecodes.net/GM/
Good info ....may help

83 cutlass 07-22-2012 02:24 PM

It shows code 33 when unhooked so i would say it works is the float adjustments made on top of choke tower or that the metering rods


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