After a drive for a couple of hours, like on the Freeway, after I get off the freeway or from a lengthy drive and when I stop at a light or stop sign the car drops RPMs and stalls. Most notably when I get to my carport there is a little bump incline and it has stalled out twice on me now when I have gotten home.

Car is a 86 Z28 with a 350 Small block, new 4 barrel Holly Carb, edelbrock intake, just put new Oil pump, oil sensor, Screen, pan, filter, Manual oil Gauge.
This engine has between 60 k and 70 k on it.
Any help would be helpful, theres not much more I can do to it.

 

How olds the fuel pump, filter, relay

 

Yes check these, espcially the FP relay. My buddy always had this hesitation when he took off from a stop or took a corner hard. We thought it was his MAF at first since it was dirty and old. Anyway we noticed his relays on the driver side firewall were a little choppy (dirty and showing wire). So we touched one of the relays just to see if it were moving, and boom car stalled instantly. We rewired a new relay on and he no longer has this hesitation and most of all his car wont stall out when we touch those wires/relays again.

Let us know after you check those.

 

The Fuel pump I think is only a couple years old. I'll check out the other stuff and get back to you guys. See I get a bit of a backfire sometimes and when you press on the gas it tends to stall sometimes a bit as well, but it catches and most times wont stall out. I'll let you guys know, I appreciate the help guys.

 

Restrictions in the exhaust IE cat can cause some of these problems as well.
Is the timing set right also ?

 

What about my EGR Valve? I had the Check Engine light come on and took it to a shop and they scanned it and said the error was related to the EGR Valve. Could that be the problem?

 

Start the car, press on the diaphragm on the bottom of the EGR valve, if the engine stumbles when you push this in, your EGR is ok.