strange no start issue

[Cravin Boost]

I just had a engine built (got forked over hard) the Engine runs but I have a strange issue. every once and a while the seems to Pseudo backfire (generally when I am shutting the motor off) it kind of gives a POP/PUFF hard to explain the sound. When that happens it doesn't matter what I do the car wont start again until ti cools down close to cold ( 45 Mins to an hour with the hod up) I have had it happen a couple times when trying to start the car but its usually when I turn the car off. when I first got the car back the line that attaches to the boost gauge would get blown off by the POP I changed to a connector that had teeth and that stopped happening but the other problem still happens. any ideas on this?

 

[jdub]

Check your CPS wiring...shut it down and wiggle the connector wires. Also take a look at the CPS wiring that goes across the top front of the motor.

Do you have any codes?

Is your timing set at 10 deg BDTC with the diag block jumpered?

 

[Cravin Boost]

unfortunutly the jumperblock to test cods is trashed filled with mud and who knows what else.

 

[JustAnotherVictim]

Clean it.

 

[jdub]

The diag block is filled with di-electric grease...sure there's not just a layer of dirt on top? You need this block to be functional if you want to figure out what's wrong with the motor (what JAV said)

 

[JustAnotherVictim]

As dub said it's grease, it's gets brownish after awhile sometimes.

 

[Cravin Boost]

OK will give a shot at cleaning it.