New 383 will not idle.

Posted By: greg383

New 383 will not idle. - 07/31/11 10:53 PM

I just got my new 383 running.Broke in the cam and now when i try to turn the idle down it will not drop below 1800rpm to 2000rpm with out stalling and blowing back through the carb.Then its hard to start back up and will only stay running above 1800.

Posted By: ademon

Re: New 383 will not idle. - 07/31/11 10:59 PM

sounds like your timings way retarded, turn the distributor a good amount advance and lock it down

Posted By: 69440

Re: New 383 will not idle. - 08/01/11 12:16 AM

Sounds like a possible bad vacuum leak.

Posted By: Mr.Yuck

Re: New 383 will not idle. - 08/01/11 01:41 AM

check the coil side of the ballast. see if it has at least 9 volts.

Posted By: phantomx

Re: New 383 will not idle. - 08/01/11 07:10 AM

What is your ignition set-up? I had a similar problem with my 440 source ready to run dist. I swapped in a stock points dist and it ran like stock.
Travis..

Posted By: greg383

Re: New 383 will not idle. - 08/01/11 01:53 PM

I have the 440 source/pro comp distributor.Ive tried turning it to change timing but it doesnt matter where it is,still does same thing.Do I need to hook both wires to coil and key on power to power of coil.I have a MSD Blaster 2 coil.

Posted By: Mr.Yuck

Re: New 383 will not idle. - 08/01/11 02:32 PM

Quote:

I have the 440 source/pro comp distributor.Ive tried turning it to change timing but it doesnt matter where it is,still does same thing.Do I need to hook both wires to coil and key on power to power of coil.I have a MSD Blaster 2 coil.

I'm guessing you followed the directions give. Did you check the ballast yet? I had the same issue a few months ago. car would start up and run above 1500rpm as soon..and I mean as soon as I dropped the rpm it would shut off. Acted like it was running out of gas. I swapped ECM, Votage reg, cleaned the carbs. Long story short, the ballast went bad. Over to the shelf, new ballast and 2 minutes later problem solved.

Posted By: greg383

Re: New 383 will not idle. - 08/01/11 02:43 PM

I followed the directions that i got from pro-comp.Ground side from distributor to ground side of coil.Running a msd blaster 2 coil.12v direct to positive side of distributor.Resistor side of resistor to pos.side of coil.Pro comp said that the dist needed 12v with out a resistor.When it does shut off it coughs up through the carb,its like it just shuts off at lower than 1800 rpm.

Posted By: Mr.Yuck

Re: New 383 will not idle. - 08/01/11 02:56 PM

Vacuum leak?

Posted By: greg383

Re: New 383 will not idle. - 08/01/11 03:02 PM

Im pretty sure i dont have any,sprayed cleaner all over the place while it is running and got no change,it would have to be a pretty huge vacuum leak,at least thats what i thought too.

Posted By: buildanother

Re: New 383 will not idle. - 08/01/11 03:19 PM

Make sure the secondaries are fully closed too.

Posted By: greg383

Re: New 383 will not idle. - 08/01/11 03:30 PM

I will check that,its a new Edelbrock 750,im used to holleys so still learning about this one.

Posted By: Mr.Yuck

Re: New 383 will not idle. - 08/01/11 04:22 PM

Quote:

I will check that,its a new Edelbrock 750,im used to holleys so still learning about this one.

nevermind...
(go get a holley)

Posted By: greg383

Re: New 383 will not idle. - 08/01/11 04:36 PM

Thats what im starting to think as well.

Posted By: JohnRR

Re: New 383 will not idle. - 08/01/11 04:47 PM

Quote:

Quote:

I will check that,its a new Edelbrock 750,im used to holleys so still learning about this one.

nevermind...
(go get a holley)

This is where I will agree wit hyou , the performer 750 is a piece of junk , but it's not the main reason behind his idle problem.

I thought with that CCJ ready to run you have to ditch the ballast resistor ?

Posted By: Dodgem

Re: New 383 will not idle. - 08/01/11 04:57 PM

did you re-check your firing order??

Is the cam degreed in?

Posted By: Sinitro

Re: New 383 will not idle. - 08/01/11 06:30 PM

Quote:

I have the 440 source/pro comp distributor.Ive tried turning it to change timing but it doesnt matter where it is,still does same thing.Do I need to hook both wires to coil and key on power to power of coil.I have a MSD Blaster 2 coil.

What ignition box are you running?
If ProComp....
Chuck it in the trash, their distributor is OK (cloned after MSD) but the box is cheaply designed and not reliable. We just pulled one out of a friend's 65 Sat and put in an MSD starts/runs fine now..

Just my $0.02..

Posted By: phantomx

Re: New 383 will not idle. - 08/02/11 06:10 AM

If you have access to one, try plopping in a stock dist and see if your troubles go away. That sounds just like what mine was doing.
Travis..