Boost gauge working?

[treegump]

 

[GMCYA]

NOPE!

 

[treegump]

NOPE!

boo. if I'm in fifth gear and doing 60 and push the pedal to the floor - i can sometimes get it to move up to 3-4 lbs...but that's the highest.

 

[GMCYA]

You should see 4-5 while you were driving, from what I can make out, it is only showing 1.

 

[treegump]

You should see 4-5 while you were driving, from what I can make out, it is only showing 1.

i know autozone carries one that goes between -5 to +15 I think...should I trust that as a temporary gauge?

 

[ak diesel driver]

are you getting lots of black smoke when your into the throttle hard? If so the guage maybe accurate. Your vid was hard to see but from what I saw most of your driving was at pretty low rpms.You won't produce much boost at low rpms.

 

[treegump]

I do under a load but I get white smoke when unloaded - http://www.dieseltowingresource.com/showthread.php?p=184144#post184144

 

[ak diesel driver]

I'd suspect your boost system isn't working properly. Are you still using the stock vac system?

 

[treegump]

I'd suspect your boost system isn't working properly. Are you still using the stock vac system?

um...as far as I know. I don't really know how to check. the boost is tapped into the upper most of the intake manifold - smack dab between the turbo and the motor.

 

[ak diesel driver]

I'm not talking about your guage I'm talking about your turbo

 

[treegump]

I'm not talking about your guage I'm talking about your turbo

oh, sorry...haha. i suppose it might be a wise idea to get this - http://www.heathdiesel.com/P/HDP1246/ - huh? I have the factory ecm though, as far as I know (unless the previous owner replaced it) - but does that matter?

 

[ak diesel driver]

That would be a good upgrade even if you don't have a problem. The only thing to watch for with stock ecm is to keep sustained boost levels down or your ses light will come on and or possibly defuel. It's pretty easy to check if your ecm is stock just pull it out to where you can see it if it has all factory info on it its stock if it is a reflash there should be someone elses info on it.

 

[GMCYA]

DOH! It's a 6.5...post in the 6.5 section. Those guy's can help you better than here.

 

[treegump]

DOH! It's a 6.5...post in the 6.5 section. Those guy's can help you better than here.

I know - but I thought it was the gauge and since this is the interior components, I thought that was where I should post my initial question. But now I've learned, and I'll try not to make that same mistake again. My apologies.

 

[CtChevy427]

Moved here to see if we can get Forest some more help from the experts.....:thumbsup:

 

[Matt Bachand]

YOu can try to wire shut your wastegate to see if that improves you're boost as a TEMPORARY fix. Something free and fun to try.

Vacuum pump, vacuum lines, wastegate actuator module mounted on bracket next to upper plenum drivers side, vacuum line, wastegate.

Check those for suspision, pull themw while running to see if there is a slight vacuum if you don't have a gauge for now.

Move wastegate with your hand a few times to make sure its not frozen.

Get to know your vacuum pump system.... Then ditch it for a mechanical TM type design that lowers your EGT's considerably.

 

[treegump]

I asked TurbineDoc about it while I was having that rattling noise and he suggested I try clamping the wastegate shut, but he recommended that I do it only if I drive carefully - not hotrodding it - but since I have the habit of driving like I stole it, I didn't want to take the chance. But I'll check everything when I get a chance. Thanks! (Oh, btw, what's the thing mounted to the top of the turbo - is that not the wastegate actuator module) Thanks!

 

[Matt Bachand]

I asked TurbineDoc about it while I was having that rattling noise and he suggested I try clamping the wastegate shut, but he recommended that I do it only if I drive carefully - not hotrodding it - but since I have the habit of driving like I stole it, I didn't want to take the chance. But I'll check everything when I get a chance. Thanks! (Oh, btw, what's the thing mounted to the top of the turbo - is that not the wastegate actuator module) Thanks!

Take a couple pix of your engine bay.

 

[treegump]

Ok...so I decided to go ahead and hook up a fuel pressure gauge (I hooked it up off the T by the oil filler) - and this is what I got (still not getting more than 3-4 lbs of pressure on the boost gauge) :
Idle ~5 psi
Light Accel ~4 psi
Deccelerating ~6 psi
Mild Accel ~4 psi & some smoke
Hard Accel ~2.5-3 psi & lots of smoke
30 mph cruising ~ 5 psi
45 mph cruising ~ 4.5-5 psi
65 mph crusing ~ 4 psi
65-75 hard accel ~2.5-3 psi & quite a bit of smoke (but no quick response - gradual...unless pulling a trailer, and I just sit there and not speed up)

 

[treegump]

To clarify:
1) Center of Engine Bay (as best as I could afford) | 2)Passenger Side Engine Bay

3)Driver's Side Engine Bay | 4)Empty Connection port to the right of the engine light

5) Random wires that I didn't hook up to the engine fuse panel

6) Wires on in the running lights & in the RR wipers (I don't have rear wipers) | 7)Fuel coming out a little from the T-port where I have my fuel pressure sensor hooked up

8) I just realized what this was - the ABS controller? Is that plug in the back where I can disconnect the ABS? (I thought I saw somewhere that ABS sucks on these trucks and its better to disconnect them) (not to get distracted from my lack of response and power)