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Stalls when dropped in gear #1722477
01/05/15 05:51 PM
01/05/15 05:51 PM
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Ball Ground GA
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TrueTripleX Offline OP
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Have a 383 A/T with new edelbrock. Even with the idle set at 1500, when I drop the car in gear it stalls and immediately dies. No major cam or any radical race parts on the motor and tranny is stock (it MAY have a higher stall converter- but not certain - just got the car). Any suggestions or thoughts?

Re: Stalls when dropped in gear [Re: TrueTripleX] #1722478
01/05/15 05:55 PM
01/05/15 05:55 PM
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GTX MATT Offline
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Whats the initial timing, at 800 rpm not 1500?


Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
Re: Stalls when dropped in gear [Re: GTX MATT] #1722479
01/05/15 06:08 PM
01/05/15 06:08 PM
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Ball Ground GA
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Quote:

Whats the initial timing, at 800 rpm not 1500?


i have to keep the idle at 1100, or it will stall out and at this RPM it is set at 14 degrees.

Re: Stalls when dropped in gear [Re: TrueTripleX] #1722480
01/05/15 06:17 PM
01/05/15 06:17 PM
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GTX MATT Offline
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Sounds like you may have a vacuum leak or possible other issue.

What kind of ignition? What kind of intake? How does it respond when you hit the gas? Did you just change the carb? Is the choke hooked up? Did you buy it like this?

Last edited by GTX MATT; 01/05/15 06:18 PM.

Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
Re: Stalls when dropped in gear [Re: TrueTripleX] #1722481
01/05/15 07:07 PM
01/05/15 07:07 PM
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Indiana
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YO7_A66 Offline
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Possible vacuum leak or your carb is way too lean on the idle circuit. After you confirm no vacuum leaks, then richen up your metering screws and try to put it into gear. If that helps, then keep richen it up until you can get it to idle at a decent rpm in D.
With an auto, you can tweak the carb (after ignition is good) in N to get you close. Then you need to finish your carb tuning in D. Keep tuning your mixture screws to achieve your best vaccum in D at your rpm required.


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Re: Stalls when dropped in gear [Re: YO7_A66] #1722482
01/05/15 07:22 PM
01/05/15 07:22 PM
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Greer, SC
TooMany62s Offline
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You mentioned "new Edelbrock". If not being used did you plug the vacuum port in the rear of the baseplate along with any other unused ports? Correct base gasket?

Re: Stalls when dropped in gear [Re: GTX MATT] #1722483
01/05/15 07:27 PM
01/05/15 07:27 PM
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Ball Ground GA
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TrueTripleX Offline OP
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Quote:

Sounds like you may have a vacuum leak or possible other issue.

What kind of ignition? What kind of intake? How does it respond when you hit the gas? Did you just change the carb? Is the choke hooked up? Did you buy it like this?


I did check for vacuum leaks and did not find any. Ignition is standard electronic ignition. Intake is Weiand. Responds find to throttle. It came with the carb and was told that it was JUST put on NEW (and it looks new). Manual choke and this is teh way it arrived.

Re: Stalls when dropped in gear [Re: TrueTripleX] #1722484
01/05/15 08:09 PM
01/05/15 08:09 PM
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I ain't discounting a vac leak but 14 initial at 1100 RPM ain't enough especially as I think you'd be into the springs at that point. (what springs are in there?). I'd turn the dampener till the slit is at 20 deg BTDC then turn dist till the magnet is dead even with the tooth. You might pull the top & confirm floats are 7/16"


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Re: Stalls when dropped in gear [Re: TrueTripleX] #1722485
01/05/15 08:23 PM
01/05/15 08:23 PM
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Tucson, AZ
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A low or improper float level may react this way. Ask me how I know!

Re: Stalls when dropped in gear [Re: TrueTripleX] #1722486
01/07/15 07:14 PM
01/07/15 07:14 PM
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Northeast
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Block off the vacuum advance to the distributor and set your timing that way. Many times people set their base timing with the vac advance actuated, giving them a false reading. When you put the car in gear, the RPM drops, the vacuum drops, and your timing retards.


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Re: Stalls when dropped in gear [Re: TrueTripleX] #1722487
01/08/15 09:24 AM
01/08/15 09:24 AM
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Central Pa
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It sounds exactly like a bad torque converter, very surprised no one on here mentioned that.

Re: Stalls when dropped in gear [Re: moparjim79] #1722488
01/08/15 10:47 AM
01/08/15 10:47 AM
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Western Colorado High Desert
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First off, did it do this with the old carb and intake?
Sounds like it is not on the idle circuit.


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Re: Stalls when dropped in gear [Re: moparjim79] #1722489
01/08/15 04:35 PM
01/08/15 04:35 PM
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Graham, WA
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Polarapete Offline
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Quote:

It sounds exactly like a bad torque converter, very surprised no one on here mentioned that.




I have had personal experience with that very same problem, though it was with a Ford (Frod) Expedition with the 5.4 (another bad idea from Ford). The lock-up torque converter failed and the vehicle would stall when put in gear. I pulled the trans pan and found enough aluminum in the oil to make a small block piston

Not saying that is your problem, you should check for overall health of the motor first...I had a 426 Street Wedge in my '64 Polara that would not idle at less than 1,500 , but it had a spun rod bearing

I have not seen everything yet


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Re: Stalls when dropped in gear [Re: moparjim79] #1722490
01/08/15 04:50 PM
01/08/15 04:50 PM
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Rio Linda, CA
John_Kunkel Offline
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Quote:

It sounds exactly like a bad torque converter, very surprised no one on here mentioned that.




Hold the brake with the left foot and use the throttle to keep the engine running when it's dropped into gear, if it'll stay running (converter stalled) it's not likely the converter.

Converters get the blame in most of these situations but I'd wager the tuneup is at fault the majority of the time.


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Re: Stalls when dropped in gear [Re: moparmarks] #1722491
01/08/15 05:00 PM
01/08/15 05:00 PM
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Overpriced Housing Central
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Check the baseplate sealing. Sometimes carb linkage will hit manifolds, especially pass side, and it can be very slight. Make sure there is no interference.

Huge idle speed drops like that are likely timing related. Another clue is run on after the key is shut off. Not enough initial timing.

Do the idle mixture screws make any difference in how the car runs? If not, what I would do. Set idle mixture screws to 1.5 turns out from bottomed.

DO NOT DRIVE THE CAR AFTER DOING EITHER OF THESE UNTIL TOTAL TIMING IS SORTED OUT.

Advance timing until the starter kicks back or strain really hard, then back it off a smidge. Start car and see if you can get idle speed to a reasonable range 800-1000. Adjust idle mix screws and speed. See if it still lugs down. Cams like the 509 are a PIA for RPM dropping because of the low vacuum to start with, especially with stock converters. See where idle timing is for the point just short of starter kickback. This is about where the idle timing should be.

OR

Start the car, vac adv disconnected/plugged, and sneak up on setting timing to 36*. DO NOT DRIVE THE CAR. If the engine races to a really high rpm turn the idle speed screw out as you feed timing in. Try to keep idle about the same as it is now.

Once at 36*, start slowly turning the idle set screw out lowering idle speed. See if you can get the idle down below 1000 rpm. If you turn it out and the engine makes a sudden drop in rpm, check timing.

Still at the original setting? If not, it dropped out some mechanical timing. Reset it to original 36* and continue turning idle speed screw.

If you can get it to idle in a decent range 800-1000, the issue likely is timing related. Check that the you have control of the idle mixture screws.

This whole test should take no more than about 5 minutes.

If you don't know the cam in your car, that's another issue. A good baseline idle timing for most mopars is in the 14-18 range depending on engine. More camshaft = more idle timing.

Set timing at 16-18, if it's a raspy cam, 20-26, and screw idle speed screw in/out until you hit the new found idle speed 800-1000.

Re: Stalls when dropped in gear [Re: RobX4406] #1722492
01/08/15 06:51 PM
01/08/15 06:51 PM
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SHELBY TWP,,MICHIGAN
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I had the same problem and it turned out to be a vacuum issue...


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Re: Stalls when dropped in gear [Re: 72N96RR] #1722493
01/08/15 11:10 PM
01/08/15 11:10 PM
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Overpriced Housing Central
RobX4406 Offline
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Quote:

I had the same problem and it turned out to be a vacuum issue...




Yep, If the OP has ANY vacuum operated items, PB, etc, block off EVERYTHING at the manifold to isolate the intake/carb tract.







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