Idle issues with dvda distributor

benchracer1 · Posted: Mon Jul 06, 2009 9:19 pm Post subject: Idle issues with dvda distributor

Put a long block in a 73 type 1. Replaced the carb with an empi 34 pict 3. I can not get this car to idle with any regularity. My main problem is the car absolutely will not Idle when it comes off the high Idle cam until the car has warmed up a bit. When timing set at 4 ATDC It is impossible to get the idle speed above 600 or so rpms. When I pull the retard line loose the idle jumps right up to 1200 + rs. I am wondering if this empi may not work well with this ditributor. If I set total advance at 30 or so I have the same idle problem. Off Idle it runs great. I am giving consideration to capping the retard and moving on but Iwould like to figure it out before plan b. Any ideas would be bitchin, I am not a real fan of the dual vaccuum distributor. I am not sure of the empi carb

Towel Rail · Posted: Mon Jul 06, 2009 9:39 pm Post subject:

I think the carb needs attention -- it might have the opposite problem of this one: http://www.thesamba.com/vw/forum/viewtopic.php?t=365762

DVDAs are fine distributors when paired with a healthy carb, but if need be, you can disconnect and plug the retard side and time it like an SVDA. When you're timing it for full advance, is that with the hoses on or off?

- Scott
_________________
1974 Thing -- under the knife
1967 Beetle -- spring/summer/fall driver
1996 Subaru OBW (EJ22, 5-speed, AWD) -- winter car, 3-seasons "don't feel like biking today" car

049 > 070 > 053 > 009

benchracer1 · Posted: Tue Jul 07, 2009 6:42 am Post subject:

carb is brand new. timed wyth hoses on.

borninabus · Posted: Tue Jul 07, 2009 6:56 am Post subject:

check this out. it's from the late model beetle forum:
http://www.thesamba.com/vw/forum/viewtopic.php?t=278191

i know it's not your exact carb. some of the same things apply i'm sure.
_________________
88 Van WBX, A/T - 93 Multivan 5cyl 5M/T - 13 JSW TDI 6M/T - 2012 Touareg TDI Sport

Towel Rail · Posted: Tue Jul 07, 2009 3:16 pm Post subject:

Even new Empi carbs can be poorly machined and have leaks. Sad but true...
_________________
1974 Thing -- under the knife
1967 Beetle -- spring/summer/fall driver
1996 Subaru OBW (EJ22, 5-speed, AWD) -- winter car, 3-seasons "don't feel like biking today" car

049 > 070 > 053 > 009

benchracer1 · Posted: Wed Jul 08, 2009 12:18 am Post subject:

got it to idle occasionally. It also seems that the accelerator pump is not getting it. It falls on its face when accelerating with anything other than gentle application of the throttle. I am strongly suspect of the carb being less than good out of the box.

benchracer1 · Posted: Thu Jul 09, 2009 12:22 pm Post subject:

Here is what is remaining of the problem. I found the accelerator pump diaphram pulled inward between two screws rendering the accelerator pump inop. Great quality control.

Car idles when initially started. Ater the high idle cam kicks off the car discontinues idling. After a few minutes of warmup the car runs and idles great. If the car is let set for say an hour it starts but does not idle for a few minutes until warm again. Is this possibly a choke adjustment? Less than impressed with this empi carb. Something brand new out of box should not give these issues. Also vaccuum is 15 psi

Randy in Maine · Posted: Thu Jul 09, 2009 1:07 pm Post subject:

Does the idle solenoid work correctly?

It should be wired this way....

Image may have been reduced in size. Click image to view fullscreen.

and the test is to turn the key to the "on" position but not running and reach back there and pull the crimped wire connection off the solenoid. You should hear a "click" 8 times out of 8 tries.

Make sure it snug in there with no teflon tape of anything and the crimp connections are good and tight.

About half of those Brosal carbs are crap. Better off rebuilding the Gemerman Solex carbs that came with them.

ccpalmer · Posted: Thu Jul 09, 2009 1:33 pm Post subject:

After two years I finally stopped using my vacuum retard. Having the idle timing so retarded meant that I had to have my carb screws way out and harder to get a good idle. Much happier now that I disengaged the vacuum retard. There are different versions of the 34PICT carbs, and I suspect mine doesn't like playing with ATDC timing.
_________________
'71 Westy

benchracer1 · Posted: Thu Jul 09, 2009 1:42 pm Post subject:

Unfortunately I did not have any 34 cores and the original the guy left outside. Definitely not impressed with this carb. Wiring is correct. I am also thinking of getting rid of the retatrd but 1st choice is to leave stock. I also suspect this carb may not be set up for this distributor.

ccpalmer · Posted: Thu Jul 09, 2009 3:18 pm Post subject:

benchracer1 · Posted: Thu Jul 09, 2009 9:21 pm Post subject:

Actually I think I am going to try tightening up the choke a bit. It is the only thing I have not done. All indications point to this. I can usually figure this stuff out but this one is very frustrating.

Culito · Posted: Thu Jul 09, 2009 10:48 pm Post subject:

benchracer1 · Posted: Mon Jul 13, 2009 7:18 am Post subject:

Tightening the choke helped the idle dead zone. It did however as expected make the idle a little rich and rough till the choke reopened. I strongly think that the carb is not real great quality


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