cowman79
Full Access Member
I only see 10 psi when the go petal is on the floor and I am running about 3000 rpms.
Help! What's wrong with my turbo setup, why no boost?
- Thread starter Mikerson
- Start date
How does one check for this? Don't tell me I have to pull the turbo off again!
Thanks for all the great suggestions guys.What awesome help! Propane, hills, lighter. I can't wait to get back at it. This wedding is in Leavenwort, Wa. though... Could be worse.
cowman79
Full Access Member
I am pretty sure to check the tips on the hot side you would need to pull the turbo and look up inside the exhaust outlet or remove the elbow on the turbo and look at the tips.
'94IDITurbo7.3
HAMMER DOWN!
only way to see the hot wheel is to take the turbo off.
do you have ANY exhaust leak sounds coming from around your firewall?
at the up-pipe slip fit joint you will be looking for something along the lines of this..........
do you have ANY exhaust leak sounds coming from around your firewall?
at the up-pipe slip fit joint you will be looking for something along the lines of this..........
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homelessduck
Full Access Member
Mine builds boost in park but I have the upgraded exhaust housing and 3" down pipe. Mine also whistles super load, but I don't have an exhaust. I would definitely see what your egt's are and adjust fuel accordingly. If that doesn't work you probably have a bad leak or melted exhaust fins as Russ suggested.
84TD
Full Access Member
What you can do to find boost leaks....
Get a PVC endcap that fits into the rubber reducer on the turbo intake side and a air hose fitting, tap the endcap to accept the air hose fitting and clamp it in place of your intake tube, then set your air compressor regulator to 10psi and plug it in and listen for hissing air leaks and fix what you find...
hot side leaks will have black soot all around them, fix em it you have any.
clear as mud??
a stock turbo will not boost in park and prob barely around the block but you should still see some movement when you floor it.
Also turbos as small as ours only really whistle under load, I have straight piped and I only hear mine when I floor it.
Get a PVC endcap that fits into the rubber reducer on the turbo intake side and a air hose fitting, tap the endcap to accept the air hose fitting and clamp it in place of your intake tube, then set your air compressor regulator to 10psi and plug it in and listen for hissing air leaks and fix what you find...
hot side leaks will have black soot all around them, fix em it you have any.
clear as mud??
a stock turbo will not boost in park and prob barely around the block but you should still see some movement when you floor it.
Also turbos as small as ours only really whistle under load, I have straight piped and I only hear mine when I floor it.
'94IDITurbo7.3
HAMMER DOWN!
cowman79
Full Access Member
That soot and white stuff looks like my up pipe where i tried to fix a hole and the leak around the slip joint.
homelessduck
Full Access Member
I'll check tomorrow before I head to town. Around 5lbs.
'94IDITurbo7.3
HAMMER DOWN!
cowman79
Full Access Member
I agree with that I cant hardy get any boost sitting still with my 093.
'94IDITurbo7.3
HAMMER DOWN!
yeah, this is the first i have heard of any of the IDI turbo's being able to make ANY kind if free revving boost.
faulty boost gauge.don't trust it's readings.
homelessduck
Full Access Member
I would agree but I have compared it with other gauges. Maybe it's my input location? I am using the small port on the intake snail.
Also, it's probably on the lower side of 5 , probably a solid 3.5-4 ? I'm not sure, I haven't really pushed it to see. I just noticed it was building decent pressure while working on it one day. It was near 5lbs , not sure exactly how much though.
Port size won't matter. 5psi is 5psi
That's wild. This is thr first idit I have heard of that has positive pressure without a load on the engine.
