No boost

[workingdan]

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[workingdan]

My car is making 0 boost. I have a rjc boost controller. What should I check for? Was making boost before I parked the car for the winter.

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[turbo89]

My car is making 0 boost. I have a rjc boost controller. What should I check for? Was making boost before I parked the car for the winter.

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is the wastegate closed ? or stuck open ?

 

[workingdan]

I pulled the rod off and it moves freely

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[v6turbo87]

Have you checked the line to your boost gauge? Can you spin the turbo impeller by hand?

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[TurboDave]

Got mice? Maybe they chewed through your line to the boost gauge??

 

[workingdan]

The car is making 0 boost. Its a pig. Gauge line is good. I will pull my granger valve off and make sure ball is clear.

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[TurboBuRick]

Check the turbo make sure the wheel spins.

Check the waste gate make sure its sealing shut.

Check for a major exhaust or post turbo leak. Check all the cooler couplings.

If it's not boosting at all, you will find one of the above problems.

Good luck!

Rick

 

[workingdan]

Thanks rick. Ya going to check the puck. I used a gasket this time on my dp and think its keeping the puck from sealing.

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[RmvBfrFlght]

I used a gasket this time on my dp and think its keeping the puck from sealing.

That will do it. For an internal gate DP just use a thin smear of copper RTV (copper silicone sealer).

RemoveBeforeFlight

 

[warlord]

Just my 2 cents, but i had similar issue,but i was only getting 5 to 9 psi, although i checked my waste gate and opened up my DP all looked good but still i had low boost, then for some crazy reason i started yanking On the rod for the wastegate in back and fourth motions, about 6 or 7 times,while it was still connected, and that fixed my issue, never had the problem since, i think something very tiny was holding the puck open, not sure though, most important part is that it fixed my problem......
Give the rod a few yanks back and fourth, its kinda tight but im sure ur a strong dude


87 grand national
60 psi mototron injectors
V 5.7 tt chip
Accufab fuel pressure regulator
Walbro 255 fuel pump
Hotwire kit
160 stat.
T04b turbo
K&N cone air filter
Dual radiator fans
Hooker exhaust
Scanmaster

 

[workingdan]

Thanks warlord, I removed the rod and moved the puck back and forth several times. I will pull the dp this weekend and remove the gasket and make sure everything looks right.

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[warlord]

No probs, plz give us feed back on your findings


87 grand national
60 psi mototron injectors
V 5.7 tt chip
Accufab fuel pressure regulator
Walbro 255 fuel pump
Hotwire kit
160 stat.
T04b turbo
K&N cone air filter
Dual radiator fans
Hooker exhaust
Scanmaster

 

[workingdan]

Ok so over the weekend I pulled the dp off and there was some rtv holding the gate open. I cleaned it up and made sure the puck moves freely. I also took my granger valve apart and its all good. Car still isn't making any boost. Couplings after the turbo are all good (no leaks). I just dont get it. What else should I look at?

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[v6turbo87]

Take off the air inlet to the turbo and try to spin the impeller wheel. It should spin freely.

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[warlord]

Also do like i said.......with everything connected, grab the wastegate arm and pull back and fourth a few times, like i said its a little hard to pull.....
Reason why i tell u to do this is it actually worked for me,before i did it i opened up my DP, (which had no gasket/sealeant) and saw that it moved freely, with no obstruction and sealed properly, 1 week later i gave it a few tugs on the arm and that brought my car back to life


87 grand national
60 psi mototron injectors
V 5.7 tt chip
Accufab fuel pressure regulator
Walbro 255 fuel pump
Hotwire kit
160 stat.
T04b turbo
K&N cone air filter
Dual radiator fans
Hooker exhaust
Scanmaster

 

[3.8L V-8 eater]

When you drive the car and try to build boost can you hear any strange noises?? My turbo went out last summer and I could immediately hear something wasn't right...It wouldn't build a single lb of boost...If the puck is moving freely and you have eliminated the boost controller as the problem i'm betting the turbo is toast!! If so contact Bison

 

[workingdan]

Warlord I tried that once. I will give it another shot after I take off the intake pipe and check the impeller. I didn't hear any strange noises while I was trying to build boost. I will give these things a shot on Wednesday

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[workingdan]

Ok so I got a chance to look at my GN, I found that I left a rag stuffed in my intake pipe before my maf sensor. I guess I cant build boost if the turbo isn't getting any air. I feel like an ass but at least its running good now. Thanks guys

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[34blazer]

Nice.