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Home » Public Forums » GMCnet » HELP! Runs perfect then just dies! (RESOLVED!)
HELP! Runs perfect then just dies! (RESOLVED!) [message #352642] Sun, 08 March 2020 14:42 Go to previous message
Green machine is currently offline  Green machine   Canada
Messages: 184
Registered: July 2019
Location: North Vancouver BC
Karma:
Senior Member
Hello all! Seeking some help once again..

I've just done a full rehab of my fuel system and to my surprise, it fired right up and ran beautifully. Sadly, it died after about a minute and would not start again. When It died it was like i turned the ignition off. No stutter or strange behavior. Wait 15 minutes and it flashes right up and again, runs beautifully then dies in the same manner as before. I'm sure i could repeat this process but only tried it twice before posting here.

Should be noted that it ran fine previous to the rehab but I'm doing a full restore so the floors are out. Figured it was a no-brainer to do this stuff now.

What I have done/replaced and not done in the rehab;

Dropped tanks and repainted.
New sending units.
All new rubber fuel lines. Like every single one.
Added a twist off fuel filter, and fuel pump to the aux tank to prevent vapour lock issues
New selector switch.
Installed the insulated carb to pump fuel line from Jim K.

Did not replace the vapor separator and did find that it was not sealed so I sealed up a crack with some rtv.
Did not replace the vapor canister or do anything with it at all.

I just want to reiterate that it did run fine before so my thought is it is not likely to be either of the two things i didn't replace.

Thanks for reading and any help is appreciated as always!!

Shawn




Shawn Harris North Vancouver, Canada 1977 Palm Beach 403

[Updated on: Tue, 10 March 2020 17:21]

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