Volvo :: 1987 / 740 Turbo Has No Power On Boost
Mar 2, 2013
It starts and idles fine and drives fine until the turbo spools and gets past atmospheric.. at this point the acceleration gets worse even though you can clearly hear the turbo blowing (gauge well into the yellow).. checked the ground connections on the head and intake, seemed good, replaced tps, replaced knock sensor, replaced hall sensor, tried another ecu, checked cam timing. Had a volvo mechanic friend looking at it prior to my fiddling with it and he seemed to think the ignition timing was retarded too much.. but I've done everything i can think of to tackle that problem.
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Well I am at a loss now. Rebuilt the turbo with a new wheel and kit from Riffraff. I still have no power, no boost and no codes. The new wheel whistles. I can hear it. It sounds way better than the old one. But still no power. I really don't know what to do now.
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Having this problem, what to do to correct it? There is no hole in the boot and this just started about a year ago. Does not do it all the time.
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I have a 2004 Excursion with the 6.0. Lately it seems like the motor just doesn't have the boost it should. Funny thing is that the boost reading through the edge cts seems to be right. Under full acceleration it will pull 27 psi boost and 3900+ ICP pressure. No codes are being thrown. It just doesn't "feel" right (seat of the pants) and it also sounds louder but I don't known this for sure.
Where does the CTS get its boost reading from? The truck has new boots on the hot side from riffraff. Anything I can check?
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Sudden power loss experienced. CEL (Check Engine Light came on) and Glow Plug Light was flashing. Power loss is severe so really can't drive it anywhere. Turbo Failed at 5500 miles.
Mechanic quote: "Found code P0299 for turbo power under boost. Removed upper engine cover and intake hose. Checked turbo shaft and found play near intake side of turbo. Removed lower engine shield and lower hose to intercooler. Checked for metal. Contacted VW and created VTA. Instructed by VW to replace turbo. Did."
Sounds like service manager abbreviated when entering into the computer. In any case a shame that this car was in the shop for more than a week while the dilly dallied and waited for a turbo to be shipped in.
Some earlier turbo-fail threads from last summer stated dealer told them "bad batch" of turbos was being experienced by VW. Believable, particularly if they're banged out in China? Let's all hope it was a bad batch.
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I am experiencing a power/boost pulse when under moderate to heavy acceleration. I'm wondering if this is a sign of my diverter valve failing or another issue withing the turbo system.
I don't have a boost gauge and the main pulsing seems to be between 2800 and 5k in the rpm band.
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Just wondering, what the max boost rating on a stock turbo, stock engine in a 2011 is. I know the gauge goes up to 40 PSI, but I don't think I've ever seen my go past 20.
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Check engine light is on says low turbo boost but gauge says it has a lot of boost. Only happened after I put catalytic back on for smog test. Before that no problem.
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I have done some searching on this, seen a video on YouTube but haven't read anything that is firm on what it is. We pulled our 5er for the first time last weekend and the chatter was pretty pronounced in the Arbuckles here in OK. I was running around 65 mph when I hit the largest hill and as I was climbing my speed naturally dropped, boost was around 17 - 18 psi when the chatter started.
Is it something to be really concerned about? Is there anything to be done to prevent it? I'm pretty much still stock, only deletes have been airbox to 6637, and I deleted the heater by turbo for the boost gauge. Other than that everything on truck is still stock.
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I have a 2013 F350. Since it was new in August the turbo has made a chattering sound that sounds to me like the waste gate (if it had one) is opening and closing rapidly. Almost like its building boost and dumping it over and over again. Usually happens when it is in 6th gear around 1700 rpm under light load. It also does it from time to time while plowing snow. You can power through it or let off and it will go away. My local dealer where it was bought new put a new turbo on it and the problem still persists. The truck just turned over 8k miles and has been in several times in attempt to resolve the issue. They say that there are no codes on the truck nor does Ford have anything on their service web. My dealer claims that no one has ever had the issue.
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I've been having issue with my truck lacking boost over the past month or so. The psi levels are normal in the morning when I start it up cold, the problem almost always occurs at start-up when the truck is somewhat warm and has been sitting for an hour or more after use. I've had boost levels at idle from -0.14psi to -0.56psi and as low as -1.2psi when driving as the problem is occurring, but it eventually kicks on and goes to normal levels after several minutes of driving. After originally taking the truck to a local diesel mechanic I was told it had EGR codes and they recommended installing an SCT tuner and cleaning the EGR valve to solve the problem. I had them install an SCT 5015 tuner and clean the valve but I've still been having the problems with boost.
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I have an '03 powerstroke 6.0, 4 inch turbo back exhaust. truck had lost boost and would cut in and out if i got on pedal and now a little bit of oil is collecting at tip, could this be because of bad turbo seals? And could the turbo still be alright? Another thing, I'm losing coolant, and I have noticed when I took the EGR out and cleaned it, the valve itself was the powdery black carbon, the cooler was wet, and I know it's not supposed to be like that. I am not thinking head gaskets yet, cause if it had a blown head gasket, I wouldn't be able to drive it. It is currently sitting, and I'm just trying to fix it. Would I be able to fix the turbo seals myself?
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I'm relatively new to the 6.7 engine , I have a 2014 F-350 SRW with aprox 51,000 miles on it. Normal driving I see about 8 to 10 psi of boost even under moderate acceleration although at times it will go to about 18 psi at WOT and it does this with heavy loads. At moderate acceleration the boost will jump to 10 psi quickly but immediately stop there and sometimes as the RPM"s increase boost pressure decreases. Only issues I have had with the truck was a clogged EGR cooler.
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This is a common problem. Mine goes to dealer in the morning for it. I haven't seen any recent posts within the last year on this. Did ford ever find a fix for my problem? When going up hill at low rpms I lose boost and hear the stutter out the intake..
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The ford dealer in Las Vegas replaced my turbo with a remanufactured one. Coming off the line (like quickly pulling into traffic) it goes flat on power until I get a few RPM's. Even with the old turbo it never did that and I drove it for the last 30k miles with it throwing the low turbo boost code. They put a little over 100 miles on it for road testing (I did have other things that they worked on. {4x4 2006 F250, 6.0 engine, 110k miles and I bought it new}....
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I've got a 2002 Excursion which has been giving me a little trouble lately. I've got a DP tuner, 4" exhaust, afe stage 2, and gauges (boost, trans temp, EGT). I've been running these for about a year now without any truck problems until recently
So I noticed over the past couple weeks it has gradually been taking longer for the engine to start. Started off by just having to turn the engine over a few more times. Now it has turned into having to turning over the engine for a few seconds, then turning it to off, then trying again. It always starts on the second attempt to start my truck and sometimes really hard where it blows out a little black smoke.
Not sure if this is a correlation to the problem above or not, but I've also been losing boost pressure, and I'm not sure when this started since I haven't been on the highway for a while. I noticed this because this weekend I drove on the highway and saw that I was blowing some black smoke every time I accelerated which has never been the case.
So I check my boost gauge and see that I'm sitting at like 3-5psi when I used to be at around 10psi+. I also noticed when I accelerated the boost pressure would increase like normal but then quickly drop once I stopped accelerating which is unlike anything I've seen before in my truck. I don't seem to notice a huge difference power or throttle response, but then again 95% of the time I'm driving under 40 mph to get to work. So this problem could have started the same time as the starting problem, but I can't say definitively.
What this problem could be, what to check or test?
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ive noticed my boost has been going down lately. At first I thought it was a boost leak so I replaced all the intercooler boots and both sides of the intercooler pipes. That diddnt change anything at all. I recently got new injectors (200/30%) and a hydra tune for them and it was quick the first few days i was running with that setup, my boost has been dropping and currently at WOT I can't even get to 10lbs of boost and it is noticeable driving, it's slower than it was stock. There was no play in the shaft of my turbo and the turbo in there is only 2 years old. Could the turbo be bad already? Or is there anything else I can check before buying a new one. I have an upgraded hpop and the 6637 intake.
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Took my 850 Turbo out on the freeway today, and when I put the pedal to the floor on the onramp there was a very disconcerting loss of power just as the turbo was really kicking in. No issue under mild to medium boost, but when pushed hard there is a short loss of power/hesitation, almost like a backfire, then boosts again, then the same power loss until I back off on the gas. Cannot get full boost without this happening.
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What are the correct timing marks and positions for a Volvo 940 Turbo? I especially need the position of the crankshaft pulley. I have read the timing mark is on the cover, but unfortunately mine has dry rotted and crumbled away.
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I have a 2012 R with 85,000 miles, APR chip running 93 octane with a HPFP and VWR cold air intake. I was driving my car today (slow driving on highest) and all of a sudden I felt no turbo boost, and heard a weird sound whenever I hit the gas. Car moved but would not get above 3500 rpms and couldn't really get past 60 mph. Again, absolutely no boost (I have a boost gauge as well to verify).
About to drop off the car at a shop but had a couple questions:
1. If the turbo is blown, can I still drive the car to the shop (not too far) without damaging the engine itself?
2. if the turbos needs to be replaced, what are my options besides getting the stock turbo replaced, without getting some crazy setup? This is my daily driver and I don't want to spend money beyond what I need to get it fixed, but it there is a stronger more reliable turbo for about the same as a OEM, I would want to consider... Also price for OEM replacement??
3. Without the mechanic looking at it, I'm just assuming it's the turbo but what else could be the issue? All the lines looks intact and intake is fitted correctly. I did have issues with my cam follower getting damaged at 45,000 miles (there was a hole in it) and I have been replacing it every 20,000 miles since. Didn't have any issues for 40,000 additional miles, but could damage to that cause turbo failure?
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My passat turbo went out a while back and cant figure out why? The Idle is the same as always was, engine is smooth while driving and changing gears, but the boost is very very low but not completely out. All vaccum lines are connected and cant hear the diaphram releasing like it used to abviously cause there's no pressure.
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