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#1
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More throttle means less power & speed?
I have just bought a 1982 240D with the 4 speed manual transmission. Its service is unknown & it has 290,000 miles on the clock. It seems the more throttle I give the engine the slower it goes & the less power it has. Back off the throttle a bit and it gains a bit but not very much. Trying to pull a long hill will almost stall the engine completely. The guy I bought it from says it actually did stop on him a few times. It idles fine and a compression check shows good across the board. I’ve changed the fuel filters & carefully adjusted the valves & neither helped a bit. I replaced the fuel injectors & this didn’t help. I suspected an obstruction from the fuel tank to the engine & put a small one gallon tank under the hood & still had no improvement. It is a U.S. model with the EGR valve but the tube between the exhaust manifold has been plugged and most of the EGR vacuum lines are loose. Any ideas? Thanks for any/all replies in advance. |
#2
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Quote:
What were the compression numbers, above 300?
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1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car" |
#3
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Make sure you are using a low enough gear. Use the dots on the speedo and don't be afraid to go a few MPH *past* the dots without shifting.
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#4
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Can you say.." Fuel starvation"?
Run engine with a 5 gallon can, of diesel obviously, with pick up hose AND return hose in the can. .
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[http://languageandgrammar.com/2008/01/14/youve-got-problems-not-issues/ ] "A liberal is someone who feels they owe a great debt to their fellow man, which debt he proposes to pay off with your money." Last edited by dkveuro; 12-31-2006 at 09:37 PM. |
#5
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The only other thing I can think of is an air leak in the fuel system somewhere. This is definitely a fixable problem..
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'79 300D, Ivory "Gunther" ......going '81 300SD, Metallic Blue Silver, The Grey Ghost.....going '87 300D Turbo ...gone '05 CDI.... gone |
#6
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Is the primer pump leaking? See if it leaks, it may be causing your fuel starvation. Aside from that, the other thing I could think of is the fuel pump itself.
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http://farm8.staticflickr.com/7271/7...144c3fc1dc.jpg |
#7
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Post a picture of your engine. A couple of months ago someone had a similar problem and it turned out there was a vac line running to the altitude compensator on the injector pump. Never know what we will spot.
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#8
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LOL..Well if theres a vacuum nipple there plug a vacuum line onto it ..right
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1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car" |
#9
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Yep, deffinitely sounds like you're lugging the engine. Peak power band is at/above 3,300 rpm. The engine should sound like its winding out and makin a helluva racket, never just piddling along. Search *italian tune-up* to this forum.
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#10
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Air getting in supply maybe, but after that 'tank' test it would exclude the tank outlet and lines up to where he married in the hoses for the tank. I would now try another lift pump..easy to do. ...or did he try that too! .
__________________
[http://languageandgrammar.com/2008/01/14/youve-got-problems-not-issues/ ] "A liberal is someone who feels they owe a great debt to their fellow man, which debt he proposes to pay off with your money." |
#11
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Quote:
My engine would wimp out and sound like it was being tortured before I reached the dots.
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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine |
#12
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Thanks for the fast replies & all the help. You guys really know how to make a first time poster feel welcome. To address your comments I’ll start at the top.
To Steveo: The Linkage is lined up for full throttle capability, the timing chain is in good shape & compression tops 300 across the board. To Forcedinduction: Lugging the engine just isn’t the case here. I’m doing my best to wind it tight something is standing in my way. To DKVeuro: “Fuel starvation“?…my thoughts exactly, or possibly an air leak. To Astroman: “This is definitely a fixable problem“….Thanks for the encouragement. I’m pretty enthused about this car! To Mbeige: “Is the primer pump leaking“?….Yes it is. I’ve just ordered one & this is where I’ll start first. To Omegaman: “A couple of months ago someone had a similar problem and it turned out there was a vac line running to the altitude compensator on the injector pump.” The vacuum pump is out on this car & it’ll be the 2nd thing repaired, just after the primer pump. To 240dog: The “Italian Tune-up” is a certainty after I get it running right. Guys thanks for your help. I’ll keep you posted on my progress. I’m at a stalemate at this point as I’ve had to order my primer pump on the internet as no local supplier could be found. Again, a great big thanks to all! us441south |
#13
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?? Maybe the 240D is different the 617 and 603, but I thought that baby was critical to the engine. Maybe not as much on a manual, but still...
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-justin 1987 300TD, 1987 300TD 2008 R32, 2000 Passat Wagon |
#14
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My 79 300SD would do this to some extent. It was over fueling. I found backing off the pedal a bit generated more power, at least until the turbo spooled
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green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday )( Kalifornistani emissons ) white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank) desert storm primer 63 T-bird "The Undead" (long term hibernation) http://ecomodder.com/forum/fe-graphs/sig692a.png |
#15
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Quote:
Though I believe what us441south is experiencing is a little more extreme. Danny
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1984 300SD Turbo Diesel 150,000 miles OBK member #23 (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination |
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