Hey gang new here and in need of some help.

I have a 93' K5 Blazer that developed a cold start issue just recently since the temps have started hitting the 40's at night here in Eastern Washington state.

It's flooding out in the mornings right off the bat. Once you do get it running it runs fine all day long.

I have replaced the following so far.

1) Delco CTS sensor
2) TPS
3) IAC
4) MAP
5) Delco Spark Plugs
6) ECM
7) New Interstate Battery
8) Delco 100 amp Alternator
9) Air Filter
10) CTS pig tail
11) Cleaned engine to body to chassis ground and CTS ground to engine
12) new injectors

What we have checked.

1) No vacuum leaks
2) Great fuel pressure (gauge installed at TBI)
3) Timing is spot on
4) No leaking injectors
5) Fuel regulator not leaking down (holds pressure all night long)
6) good oil pressure while cranking (GM dash gauge)

Engine is a Built SB

204/214 cam
roller tip rockers
TBI spacer
Full MSD ignition (distributor etc. etc.)
Hooker headers
Flowmaster mufflers
SuperTrapp Baffled tips

Computer kicks no codes

We let it sit in my mechanic's shop one night and it started the next morning just fine.

I took it back home and the next morning it was 40 again and it flooded again.

Has anyone run into anything this strange before?
What else should I check?

Thanks in advance for any tips or help,

SS

 

Wow dead forum well for those interested turns out my fuel pressure gauge was bad. I have either a bad fuel pressure regulator or fuel pump.

Thanks for looking

SS