Thread: 70 chevy with 350 engine trouble

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Needle and seat leaking, either worn out or crap in it. Doesn't sound like spark to me.

To everyone, I apologize that i have not been able to respond back to your much appreciated replies. Single dad raising 3 kids under 7.
So I am using delco plugs. I did not change the plug wires out do to getting the truck started after i changed the plugs out. The general direction you guys have pointed me in is the electrical system. I will start investigating all you have mentioned. distributor, wires, maybe change the plugs again to a different brand. On another note. I did put a pressure gauge in my fuel line and it is reading around 5-6psi.

Originally Posted by rush

To everyone, I apologize that i have not been able to respond back to your much appreciated replies. Single dad raising 3 kids under 7.
So I am using delco plugs. I did not change the plug wires out do to getting the truck started after i changed the plugs out. The general direction you guys have pointed me in is the electrical system. I will start investigating all you have mentioned. distributor, wires, maybe change the plugs again to a different brand. On another note. I did put a pressure gauge in my fuel line and it is reading around 5-6psi.

Good for you! I applaud your commitment to your kids! I was a single dad to one for four or five years, and I imagine having three under seven is a rapid changing mixture of wonder and awe. Sounds like your fuel pressure is about right.

I changed the plugs and the plug wires. Checked the distributor and it is good. It is a points distributor. I have good spark. However i did find a leak in my fuel lines. After I fixed the leak I rechecked my fuel pressure when trying to crank the truck it was at least 8psi. Is this too high. The new plugs i put in did not appear to be wet when I checked them.

yes, 8 psi is to much, 6 is about max, 5 is better. A simple pressure regulator made for fuel lines is easily installed and will help prevent flooding the carb.

I agree 8psig is too much. Are you running an electric pump or did you put on one of the higher pressure mechanicals at some point? Regardless I'd shop for a good regulator to fit just before the carb, and one with a small ~1" gauge built in is a bonus for setting and future reference.

Adding a regulator is just complicating the problem.

Just replace the pump with one of a proper pressure rating.

I have not altered the fuel components since Ive had the truck. Would it make a big difference that i bought and drove the truck mostly in San Diego. Recently moved to New Orleans. Not a difference in elevation.

Any suggestions on fuel pumps I should look at. I learned something about the plugs being faulty out of the box. So I assume fuel pumps and or regulators could be the same. Thanks guys I'm learning a ton from you all.

The thing with replacing the pump is you could get another pump that makes 7 pounds or even 8 pounds again.. or install a regulator and set it for 5 pounds and know you're not flooding past the needle and seat.

My point oh two!

Thanks 34_40. I'm just gonna replace the pump and install a regulator also. I've already replaced all the ignition equipment and have the Pertronix you mentioned ordered. May as well do the same with the fuel side. My luck, its something serious. Then I'm just gonna drop that Chevy 592ci I've been looking at.

You might look at SummitRacing to get some ideas, as they have several universal regulators to choose from. You want a non-return style, and something that's adjustable to nominal 5psig. I agree with Mike that adding a regulator is simply good peace of mind that the pressure is right. Rock Auto has several different mechanical pumps at really good prices, too, but I'd probably visit my local NAPA store and see if they can cover your needs for everything.

Well i fixed the problem. Put an electric ignition in and the truck fired right up. I appreciate all of your advice.

Good to hear it's running! Thanks for the reply, it's always good when we find out what the conclusion is.

Is the fuel pressure still at 8 psi??

It is hanging between six and eight.