Starts immediately stalls

Just had WP/Oil seals/new cap & rotor replaced. Test starts fires right up stalls won't idle won't stay running with pedal. Have fuel rail press/spark/vacuum lines on.
Thoughts??? Note: no issues prior.

[quote=Just had WP/Oil seals/new cap & rotor replaced. Test starts fires right up stalls won't idle won't stay running with pedal. Have fuel rail press/spark/vacuum lines on.
Thoughts??? Note: no issues prior.[/quote]

Rond948,

I'm not familiar with your build but since your text says you replaced the "cap and rotor" I'm presuming you have an old school SBC in your 948.

Anyway, here's my 2 cents worth:

Since you had no prior issues, and all your fuel and air systems check out, then the culprit is likely electrical but something simple that got mixed up during reassembly...or possibly an incorrect ignition part.

Cap replacement and removing ignition wires go hand in hand...be sure your firing order is correct.
I'm a Mopar guy and just learned this year that SBC and LSX firing orders are slightly different.

Double check your new cap and rotor and make sure they exactly match your original.  I was sold the wrong parts enough times that I began checking parts before i left the store!

Lastly...it sounds like you know what you're doing, so if all else fails, walk back the process you went through and double check everything, especially those vacuum lines and their connections!

Further troubleshooting will require more detail of your setup.

Best of luck!

Motor is a 96 LT1 F body. Decided to replace cap/rotor only not Opti since it has been running great.
Thanks for response.

Rond948,

I'm curious if you got your motor running?? Any update?

All good. Sorry, I didn't update. Simple reassemble issue w distributor. I see you have a 944? Swap type?