engine dies in 15 minutes

[EARNHARDT#3]

Originally Posted by happy1970GMC

Hello to anyone reading this, I put a new coil in today and doubled my run time. Now it will run for about 30 minutes. I bought a remote starter, but haven't figured how to hook it up, the directions are for a more modern vehicle. Can a part store test my module for me?

I don't think so. They sure can sell you a Chinese one that won't last either though. I have a stash of GM ones incase I ever need them. Go to the JY and grab a few if you can. Around here you won't really find anything that old but maybe you have a yard with older stuff nearby.

[Grumpy old man]

I still say it's a fuel issue , The dist ,coil,capacitor ,and anything else wouldn't continue to start multiple times and just run for 13-15 minutes ,It would have completely failed already .

Dirty fuel pick up in tank
Fuel line between tank and hardline under cab collapsing / cracked
Inline fuel filter
Bronze fuel filter in carb

it starts ,runs until crud in fuel line restricts flow .Won't restart ,wait an hour fuel flows back clearing line and restarts .Dies if 13-15 minutes . Why no pictures ? a good look at the condition of the rest of the engine/fuel lines and ignition could let someone give a further diagnosis .have you tried starting it once it dies using carb cleaner to see if it will fire even for a few seconds ?

[Grumpy old man]

I just red back thru your threads ,You've been dealing with this issue since 6/2012 ? Take it to your local mechanic .

http://67-72chevytrucks.com/vboard/s...d.php?t=528601

http://67-72chevytrucks.com/vboard/s...d.php?t=529028

http://67-72chevytrucks.com/vboard/s...d.php?t=534240

[Gromit]

"I bought a remote starter, but haven't figured how to hook it up, the directions are for a more modern vehicle".

If you bought the Actron Remote Starter I believe it is in the instructions (Figure 5) - (see attached pdf)

Re using the remote starter I found it more convenient to just install a permanent 12 gauge wire from that "S" lug on the solenoid up to an insulated lug (really just a 1/4"-20 x 1" bolt through a chunk of plastic) mounted on the inside passenger side fender well next to the factory distribution block - then you can hook up the remote starter wires - one to that bolt and the other to your positive on the battery - without having to thread the leads through the headers and into the cramped space around the solenoid where it is easy to short against the positive cable.

Always turn your key to the run position before activating a remote starter (as advised in most repair manuals)..

[happy1970GMC]

When I had this problem before, I changed the fuel pump and had no problem for a couple years. That's why I changed the fuel pump again.

[Blakeman350]

I had the same problem, I tryed two different electric pumps and a mechanical pump and changed filters many times and it still died in about 15 or 20 miniues. I ended up pulling the tank to clean and coat it and found the filter sock on the sending unit pickup tube was plugged nearly solid and very rusty. So with a new sending unit and a clean tank she runs all day long.

[happy1970GMC]

For anyone reading this thread: Had the truck towed to a mechanic highly
rated on Angie's list. He's telling me 'you can't find anyone to work on a
quadrajet carb anymore." "You need a $2500 fuel injection kit" Is it really that hard to find an honest mechanic? I can simply order a rebuilt quadrajet carb for as little as $270. Where do I go to get the "screw me" sign taken off?

[happy1970GMC]

Sorry guys, I forgot, this isn't dear abby.

[Grumpy old man]

http://www.allamericanautolongmont.com/ here is a repair shop with an A+ BBB rating in your town , Bite the bullet and drop it off . The only other best bet would be to contact some of the local car clubs and ask for some help .The fuel system in these old trucks is not rocket science .Have you ever tried to pull the sending unit in the tank ? your problems started years ago and got better when you replaced the fuel pump .You may just need to clean the fuel tank and lines ? And get rid of the glass fuel filter it's a fire hazard .

[davepl]

Originally Posted by happy1970GMC

For anyone reading this thread: Had the truck towed to a mechanic highly
rated on Angie's list. He's telling me 'you can't find anyone to work on a
quadrajet carb anymore." "You need a $2500 fuel injection kit" Is it really that hard to find an honest mechanic? I can simply order a rebuilt quadrajet carb for as little as $270. Where do I go to get the "screw me" sign taken off?

Run away!

You need a mechanic who specializes in pre-1972 vehicles, probably. I'm fortunate to have 3 old veterans who work from a huge rural home shop so when I can't figure it out, they do. But that's all they do - classics and old stuff.

A basic Q-Jet tuneup is something a respectable tech should be able to do before falling out of bed in the morning. But not many current techs, working on modern vehicles, will know much about them.

Find a good local tech. Then buy him a Christmas present at Christmas, send them a card, pay your bill promptly, and hope they live forever. Odds are they will be over 50 already, one foot on a banana peel and the other....

[lyrikz]

Originally Posted by davepl

Run away!

You need a mechanic who specializes in pre-1972 vehicles, probably. I'm fortunate to have 3 old veterans who work from a huge rural home shop so when I can't figure it out, they do. But that's all they do - classics and old stuff.

A basic Q-Jet tuneup is something a respectable tech should be able to do before falling out of bed in the morning. But not many current techs, working on modern vehicles, will know much about them.

Find a good local tech. Then buy him a Christmas present at Christmas, send them a card, pay your bill promptly, and hope they live forever. Odds are they will be over 50 already, one foot on a banana peel and the other....

The $2500 dollar fuel injection is pretty funny. We just went through something similar.

On my 71 i had a quadrajet on it. It would run great, then run like ****, then run great. My tech, who is an old timer. Completely tore it down, rebuilt it and it ran great, then started running like crap again. Turns out that the pinhole passages everywhere in the carb were getting this corrosion of some kind and i think the ethanol in the fuel wasnt helping. I slapped an edelbrock on it and never looked back.
No one, not even me is going to want to rebuild your carb, but we would offer a already rebuilt unit. Slap a new carb on it and call it good. You can do it yourself and its not very expensive at $270 bucks.

[happy1970GMC]

To anyone following this: A competent mechanic found a wire from the ignition switch was faulty in a couple places. It doesn't run great yet, but at least it runs.