Bad injectors or vacuum leak?

[gen2rt]

I have a 1994, 19,000 miles, haibeck intake & port polish, headers.
Car suddenly has no bottom end, meaning bad stumble/dies at idle, when I get into it everything is fine. Since the car sits a lot my initial thought was bad primary injector(s). After searching forum, vacuum leak also looks to be a possibility. Looking for input from anyone experiencing something similar.

Thanks,
Jack

[Kevin]

with the miles I'm going to say injectors. a vac leak will cause the car to fall flat high in the rpm band

[LGAFF]

make sure your MAP sensors are connected

[Ccmano]

make sure your MAP sensors are connected

I'm with Lee... fuel pump possible too. My money is on the MAP sensor tho.
H

[LGAFF]

I was having an issue at cruise......had rotted rubber on the MAP sensor that was not visible until close inspection....Fuel Pressure Regulator too

[Demps]

Jack,
Where are you located?
Ted

[tccrab]

Map sensor hose is first guess.
Does it smoke on startup?
Second guess is fueling, either fuel pumps or filter.

Since it's a '94, injectors aren't as likely to be at fault as if it were a '90 or '91.

'Crabs

[gen2rt]

Thanks for the responses. I'll try the MAP sensor hose/connections. The ZR is parked in Colorado, I mostly live in Reno though. I'll hold off ordering new injectors and will dig into the MAP sensors when I get back to CO (in a couple months). I hope that's what it is, would rather not get into a plenum pull if I don't need to.
If the MAP sensor is ruled out, I'll start looking at the other suggestions.
I'll post back here what I find for reference.

Jack

[XfireZ51]

Thanks for the responses. I'll try the MAP sensor hose/connections. The ZR is parked in Colorado, I mostly live in Reno though. I'll hold off ordering new injectors and will dig into the MAP sensors when I get back to CO (in a couple months). I hope that's what it is, would rather not get into a plenum pull if I don't need to.
If the MAP sensor is ruled out, I'll start looking at the other suggestions.
I'll post back here what I find for reference.

Jack

Jack,

I'll be in Denver next weekend. Where is it in CO. Darby and I can check it out.

[gen2rt]

Xfire,

PM sent.

thanks,
Jack