Excuse my bad English .. I should probably worked harder at school ... unfortunately I have been having problems with my 1999 Suburban 6.5 .. bought it a week ago. it ran terrific !! but a few days ago, I drove heavy loads. suddenly all power away .. was like running into a marsh ... began to smoke very black. it will not go over 1500rpm. Turbo is in order. vacuum / westgate working properly. air filter / fuel filter is OK .. starts easily, runs fine on idle .. tried switching PMD, but no change .. afraid it might be ip, but hope not .. ip were exchanged before Christmas .. hope someone here can make suggestions .. I do not know what to try next .. there is no EGR on it. I know too little about these cars unfortunately. hope someone here can come with good advice.
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6.5, maximum 1500 rpm..??.
- Thread starter Jan Erik
- Start date
You have a vacuum controlled waste gate on the turbo. No vacuum at the waste gate means no boost.
Check codes.
Test vacuum pump. Did it lock up?
Check all vacuum lines for cracks, holes, or leaks.
Check WG actuator for leaking down.
Replace common to fail part of the WG solenoid, drive side of engine, last.
Check codes.
Test vacuum pump. Did it lock up?
Check all vacuum lines for cracks, holes, or leaks.
Check WG actuator for leaking down.
Replace common to fail part of the WG solenoid, drive side of engine, last.
Will L.
Well-Known Member
Agree with WarWagon.
Do you have a boost gauge supplied from the intake manifold? If so, what boost pressure? Guessing the answer is zero.
The black smoke is a lot of unburned fuel. Your IP is supplying plenty of fuel trying to accelerate the engine, but without the boost to feed enough oxygen, the fuel can not burn as fast as it is being injected.
If you have an inner cooler, check that the connections are not leaking.
Welcome to the forum btw.
Do you have a boost gauge supplied from the intake manifold? If so, what boost pressure? Guessing the answer is zero.
The black smoke is a lot of unburned fuel. Your IP is supplying plenty of fuel trying to accelerate the engine, but without the boost to feed enough oxygen, the fuel can not burn as fast as it is being injected.
If you have an inner cooler, check that the connections are not leaking.
Welcome to the forum btw.
JayTheCPA
Well-Known Member
Contact KOJO Power as I am sure he can easily handle doing a conversation in Norge as he is Fin. KOJO has excellent knowledge of the 6.5. Easiest way to contact KOJO is on facebook.
Agree with the others that the issue is probably from the vacuum system. Chances are good that the computer is setting an error code, so get somebody to scan the computer and start from there.
Agree with the others that the issue is probably from the vacuum system. Chances are good that the computer is setting an error code, so get somebody to scan the computer and start from there.
He did say vacuum and waste gate are working properly.
What kind of air filter do you have? Check that a rag or part of a cheap air filter is not blocking the turbo.
What kind of air filter do you have? Check that a rag or part of a cheap air filter is not blocking the turbo.
Husker6.5
135' diagonal 16:9HD, 25KW sound!
Thinking along those lines, too, especially with the no power above 1500 rpm. I've had vacuum wastegate system failure before, and while it rolled coal out the exhaust pipe, I could still get up to 3000 rpm and 75 mph (125 kph).
Symptoms almost sound like the old potato shoved into the end of the exhaust pipe trick to piss off your neighbor.
Symptoms almost sound like the old potato shoved into the end of the exhaust pipe trick to piss off your neighbor.
Mmmm french fries!
Will L.
Well-Known Member
2 points Leroy.
Will L.
Well-Known Member
Swish baby!
Husker6.5
135' diagonal 16:9HD, 25KW sound!
Go Golden State Warriors! Yup, cheap paper air filters will screw you over every time! When you buy parts, you get what you pay for.
Last edited:
Foul.
He also did say air filter / fuel filter is OK. This is why we give him suggestions anyway as it clearly helped. 'You sure about that?' Glad you got it fixed!
OK gets WW a point too
Husker6.5
135' diagonal 16:9HD, 25KW sound!
Give the man a lutefisk!