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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: redhilbil81 on March 25, 2018, 04:10:06 pm

Title: Hey guys got a 81 Scotty 400sbc w/th400tranny
Post by: redhilbil81 on March 25, 2018, 04:10:06 pm
It stalls out in reverse or drive got a pro comp thumpa can with msd ignition a new 600cfm elderbach idles great.
Where to start trouble shooting had all this in it when I bought it so anyway any help? Thanks


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Title: Re: Hey guys got a 81 Scotty 400sbc w/th400tranny
Post by: VileZambonie on March 25, 2018, 07:16:33 pm
What's the ignition system you're using and what are your settings?
Title: Re: Hey guys got a 81 Scotty 400sbc w/th400tranny
Post by: redhilbil81 on March 25, 2018, 07:44:28 pm
Good question it’s a msd billit distributor unsure of settings but the plugs are wet fouled.dont wanna change them till I get the setting right


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Title: Re: Hey guys got a 81 Scotty 400sbc w/th400tranny
Post by: blazer74 on March 26, 2018, 01:31:55 am
Check for  mechanical advance at idle, possible is in too early and dropping out when placed in gear and lowering rpm to low causing stalling.
Title: Re: Hey guys got a 81 Scotty 400sbc w/th400tranny
Post by: VileZambonie on March 26, 2018, 11:16:24 am
Is it a vacuum advance distributor?
Title: Re: Hey guys got a 81 Scotty 400sbc w/th400tranny
Post by: redhilbil81 on March 27, 2018, 07:39:38 am
How to check it, man  I’m learning mechanics since I bought this truck
Has not been driven much since I got it back in sept last year it will fire and idle great just the stalling then when it dies I have to floor it to get it to start,



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Title: Re: Hey guys got a 81 Scotty 400sbc w/th400tranny
Post by: Irish_Alley on March 27, 2018, 03:35:57 pm
take a reading here (http://forum.73-87chevytrucks.com/smforum/index.php?topic=32085.0) for Ignition Timing for First-Generation GM V-8 Engines
Title: Engine stall
Post by: redhilbil81 on March 28, 2018, 08:00:02 am
In reverse and drive after idle warm up
Has a 400sbc th 400 tranny elder600cfm carb so what are the possible causes.?it also has small lift thumper can and a 2200 stall and msd billet distrubor (don’t know settings) it   Was all in Truck when purchased. Don’t have any mechanic friends so I really don’t know where to start.
Title: Re: Hey guys got a 81 Scotty 400sbc w/th400tranny
Post by: VileZambonie on March 28, 2018, 09:46:53 am
How about taking some pics and posting them. If you don't know, we won't know without seeing your setup.