Fuel Starvation on my 69 Z?

[Salvatore]

did you run it with the air cleaner off? I had an early corvette that had an air filter that was to thin from top to bottom and at higher RPM's the carb was trying to suck the lid in. Poor air flow.

[sixt9rsx33]

Replaced the fuel pump, blew air in the fuel line back to the tank still have the same problem. My guess is that the dizzy is giving the problem.
No I have not tried running the car without the air filter but will give it a shot. Nothing to lose.
I will swap out the carb from the silver car to see if I can isolate the issue to the carb.

[Salvatore]

process of elimination.

[livettes]

If you are running the reproduction date coded original type plug wires they could be your problem.
My Deuce would nose over at 6000. Felt like it was running out of fuel. I chased the whole fuel system and could not find any problems. A friend suggested the plug wires were breaking down because of the higher cylinder pressure at high RPM. I swapped the original style for a set of MSD and problem solved.
Pulls hard to 7000.
Jamie

[PeteLeathersac]

'

Have you confirmed yet whether you do/don't have a fuel delivery problem?
Reviewing all again, the plug wires are possible but I'm starting to suspect the coil itself?
[img]<<GRAEMLIN_URL>>/hmmm.gif[/img]
~ Pete

[sixt9rsx33]

I think I have located an issue. The coil wire had corrosion on the lead that connects to the coil. I cleaned it up and now the car will tach up clean to 5K before breaking down. I started thinking about the cheap Packard wires on the car, and they have been on there for at least 11 years. I bought the car November 2005, and were on the car then. I think I will replace.

Lawrence

[Alss]

my copo did the same thing...bad coil!

[bigsixman]

I had a similar problem and it was the coil wire. The coil wire receives all the voltage and the individual wires only see voltage when that cylinder fires.

The condition of the repo style wires would raise a question being 10+ years old.

Are the plugs fresh?

[Zman1969]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Alss</div><div class="ubbcode-body">my copo did the same thing...bad coil! </div></div>

X2 try another coil

[sixt9rsx33]

I have....same problem. I have another coil wire but have not put it on yet. Work is getting in the way with playing with old cars [img]<<GRAEMLIN_URL>>/mad.gif[/img]