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Discussion Starter #1
I have a 2002 GMC van 450,000K (279,000miles), the van started having a power problems for the last year. Along with that the fuel economy dropped and finally it threw a PO216 code. Time to the replace the IP, I ordered a remanufactured AC Delco pump and installed it. The van started and ran well except it was pouring white smoke out the exhaust. It is not coolant and the van never did this before. I timed the pump and it didn't change.

I finally broke down and took it to a "specialist" to find the problem, 2 weeks later and 2000 dollars I have my van back and it still pours white smoke out the exhaust. To say that I am frustrated at this point is being kind. I have rebuilt dozens of gas engines and cars of every type but diesels are new to me and to say that lightening it on fire and rolling down a hill is about the best I can do at this point.


So what has been done to trouble shoot this problem:

- "professional" diesel mechanic

- timed it again; no improvement $400

- new injectors; no improvement $1000

- timed it again; no improvement $400

- compression test; all within tolerances $200


At that point I suspected they were as lost as I and were just throwing money at the van hoping to trip over a solution. I am not interested in paying for someones training. I brought the van home and am asking experienced mechanics if you have any ideas what has happened.


The van at this point runs great, starts great but pours out more white smoke than the foggers on the back of the city trucks.


I would appreciate any help or ideas.
 

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Welcome to DieselPlace

Start by going through all grounds ( link for grounds can be found in the 6.5L FAQ page)
If the mechanic used Snap-On equipment to time your motor the values will be incorrect..
What current codes are displayed?
Check your glow plug system. You should have 12v. going into the glow controller and 12v from the controller to the glows briefly.
Make sure all glow plugs are good. If you do not know the history of the glows I recommend that you replace them
 

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Discussion Starter #3
No codes, the glow plugs worked well before even in -20 weather
 

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Consider plumbing in a boost gauge and fuel pressure gauge so you can see what is going on under load going down the road. Lack of boost, and lack of fuel pressure would have you down on power, and usually wont trigger a dtc.
 
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Discussion Starter #5
Sorry for the long wait, working out of town. I just got back to the van, it doesn't smoke on cold start but after 3 maybe 4 mins of idling the rhythm of the engine changes and then it starts smoking. What happens at that time period. Before I changed the IP and everything was working well I had noticed that the rhythm of the engine would change at a couple of mins into warm up but never really took note because it didn't smoke until the IP was changed.
 

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What brand of injectors did you install?Theres a lot of garbage injectors being sold nowadays.I’d only use genuine Bosch or stanadyne injectors made in Italy.
 

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Discussion Starter #7
Not the injectors, I changed the injectors to try to solve the smoking problem
 

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Not the injectors, I changed the injectors to try to solve the smoking problem
Please answer the member's question.
Again, what brand Injectors did you install?
A few years back, we had a member go through 5 sets of "New" Injectors before he found a good working set.
 
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The current challenge is you cannot assume just because you replace with new parts, the new parts are good.
In a lot of cases, the new parts introduced new problems.

Why did you replace the IP in the first place?
The source of the IP is also important.
 
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