Boost comes and goes

[warlord]

I recently had a problem where i couldnt get past 10psi, so i troubleshooted the problem.(with some help from the TB) found & repaired cracked DS header,a few vac lines, and 1 bolt was loose on the downpipe. Then i drove it and boost came back 15-18 psi, then all of a sudden it goes back to not makeing more than 10psi, then comes back to 15-18 psi and vice versa


Posted from the TurboBuick.Com mobile app

 

[warlord]

scanmaster #'s @ idle

O2- goes from 74 to769
Af- 04
L8-goes from 36 to 41
Bat- 13.5
Int- 127
Bl-124
Clt- 193
Ats- 143
Rpm- 650
Tps- .46
Iac-04
Mal- 00


Posted from the TurboBuick.Com mobile app

 

[John Larkin]

Hey I'm your avatar. Seriously. That photo has been all around the internet.

I would check your hose couplings at the intercooler. I've had them be loose and boost pressure will escape there.

 

[Phoneguy]

May have a split in a coupler, also check the crossover. Double check your vacuum lines...

Bryan

 

[warlord]

Sry to sound noobish , but the crossover is where the manifold and the downpipe meet? Also to note my boost/vac gauge reads -14&-13ish, sometimes it will hit the vac mark, which is -15 @ idle and thats when i get my boost back


Posted from the TurboBuick.Com mobile app