Engine/Transmission (1994 - 1998) Low power-low boost-high egt

[bmwcushman]

Howdy all-have been searching archives for info about normal numbers. Mine are out of whack. Boost 7(3 different gauges to be sure), egt1300. Unhooked wghose at manifold; boost 8 egt 1400. No smoke except low RPM. 0-60 time 15 secs. 5-speed 3. 54 rear. Throttle down no load 2700 RPM with tons of white smoke. Anybody tell me where to start checking for the problem ? I think my info will signature on(my first time) but in case no I have a '95 5-speed stock so far. Mark

 

[Steve Roseman]

Mark, I would start by checking for boost leaks. Make sure the rubber connectors on your intake system are tight and in good shape.

What kind of shape is your air filter in?

The white smoke almost sounds like a timing problem.



edit: By the way, where's Rolfe?

 

[Koa Man]

Make sure your clamps, including the ones on the intercooler are tight. Clamps sometimes crack so look them over carefully. Like Steve said, make sure the rubber connectors are in good shape. They may have a small hole or cut in them. Make sure the rubber hose ends are all under the clamps and a section has not slipped out. Usually the rubber connector that will go bad is the softer one like that between the intercooler and the intercooler inlet duct. The "hump" hose closer to the turbo is pretty strong and rarely goes bad. A boost leak will result in low power and high EGTs.

 

[bmwcushman]

low power, boost, high egt

OK, I'll rig up the outlet hose on the shop vac to blow in the system and crawl around feeling for air for starters. At full throttle, governed max RPM, it stutters and stammers along with the gobs of smoke. I assume it's supposed to just rev up to speed and hold it there-no fuss;correct? Rolfe is 60 miles from Minn, 100 miles from SD. Anybody within 100 miles of here that is the expert on gen11 CTD.

 

[bmwcushman]

Found a leak in a clamp. Now have 11psi boost-1200 egt. With wastegate unhooked and bolt in manifold hose 12psi-1300 egt. Went down to 13. 7 0-60 with no gate. Any more ideas. Thanks for previous help.

 

[Steve Roseman]

You live up in the flat part of the state .

If your truck is warmed up, you shouldn't get any smoke to speak of at 2,700 rpm/no load.

Has this been going on for awhile? Unless you got a bad batch of fuel, I would say your timing slipped.

 

[bmwcushman]

Steve, I got it last fall. It already had one foot in the grave. Looking back at all the things wrong with it, it surely had been just driven;HARDIt had 235K on it then, about 2k more now-been doing it ever since. (low boost) I had the KDP plate fixed about 400 miles ago as it was throwing oil all over at a quart-100 miles. Performance seems the same as before it went in the shop. Did they have to monkey with the pump to fix this? I think turbo boost gauge is about the most important gauge on a diesel. As I just added it I can't guarantee it is the same as before working on it. What is a decent 0-60 or quarter mile time for stock 5-speed 2WD?

 

[Steve Roseman]

If they replaced the whole gear case due to the kdp damage, they had to mess with the timing. The pump gear and cam gear need removed for case removal. If they didn't time it right or didn't clean the shaft and the timing slipped, that could very likely be your problem. If they are a reputable shop, you may be able to get them to take care of it, otherwise find someone who will back up their work. I don't know of anyone to recommend in your area, I'm still looking around here.



As for 0-60 times, mine is about 8 seconds, 6,700 pounds. I have an auto and am just a little above stock. I think I'll be able to trim about 2-3 seconds off mine with a gsk, governs out before shifts.

 

[bmwcushman]

Steve, I'll do some checking around. Till I get this straightened out, can I run with the wg tube off-12psi @ 1300 deg? Most power that way. Something better happen soon as it has to hit the road next week.

I just noticed you're from Lorimor. I go all over the state in my moving business so I'm familiar with your location. Matter of fact, in '77 I bought my current Chevelle SS 454 from Creston and I bought a truck from Charley Brown there too.

Broke m'hip at Lenox 18 mos ago too. :{

 

[Dennis Garrett]

You must be pouring in enough fuel to get 1300 deg, but if the exhaust can't get out, you can't get enough velocity through the turbo to make boost. You might have a plugged cat. Try removing the clamp, and see if you can move the cat back off the down pipe just enough to let the exhaust out ahead of the cat, or take it off completely & test drive it.

 

[bmwcushman]

Dennis, Monday AM, one cat comin' down!! Busy till then. Thanks

 

[Steve Roseman]

Mark, I don't think disconnecting the waste gate will hurt anything as long as you're monitoring boost pressure.

On my way to work this morning I was thinking about your cat too, I'm glad Dennis mentioned it. I still think with the white smoke you have a timing problem.

Not too many people know where Lorimor is.

 

[bmwcushman]

Update info... . Waste gate diaphragm blown-have 4" exhaust ordered. Couldn't get current exhaust off to check cat flow w/o killing pipe. So when new big pipes show up in the big greenish brown truck I'll kill the old pipe. If it still won't build boost do ya think I'm looking at a shot turbo? Mark

 

[Steve Roseman]

Mark, I don't think you have a problem with the turbo. I still think you have a timing problem, you shouldn't be getting white smoke at 2,700rpm/no load after the truck is at operating temperature.

 

[bmwcushman]

I'll check it out today-just talked to the guy who fixed the KDP and he said it was advanced and he put it back to stock. Acording to what I've read, I'll shoot for 15. 5 deg. Keep ya posted.

 

[bmwcushman]

Forgot to tell you, yesterday I cut off old exhaust. Now have 13 psi, 1250 deg, 12. 8 0-60 time, no waste gate hookup. Air restriction goes down to 10. Seems a little high. With filter out the yellow thingy still comes down a little bit. Normal or do I check for a nest in the intake? Best filter ideas?

 

[bmwcushman]

Had the shop that did previous work on KDP check timing. Old order mechanic who didn't have special tools-kinda guessed. It has a little "hop" at idle-little like a hotter cam in a gasser now. EGT now at 1200, boost at 13, 0-60 11. 2. Still has the white smoke at rev-up. Really spits and sputters at WOT. Red line went from 2750 RPM at no load WOT to 3000 since advancing pump. Sputter is maybe worse-maybe just sounds like it cause now a straightpipe. This thing makin' any sense yet, docs?