![]() |
|
|
|
#1
|
|||
|
|||
new injectors, now worse mileage?
I just installed a set of rebuilt bosch injectors and took off on a thousand mile road trip to NY in my 85 300TD. So far I have dropped 2 mpg and have noticably rougher idle when cold.
The smoke at idle and under heavy acceleration that prompted the injector change is gone, but I can't figure out why my mileage got worse. These injectors were sold to me as bosch rebuilds, but look like new ones manufactured in India. I have not yet sent in my old ones as cores and am wondering if I should wait and have them rebuilt and return these new injectors since my old ones are the german made originals. Has anyone had similar experiences with an injector swap? I am guessing that I had at least one leaker in my old injectors that caused my smoke, but I am wondering if the spray pattern may be poor on the new ones causing the poor mileage.
__________________
1985 300 TD 448K 1984 300 TD 278K 1983 240D euro 240k 1994 f-250 idi turbo 330K 1986 f-350 IDI 1987 F-350 IDI 1985 JD 1050 4wd 1965 IH 3660 |
#2
|
|||
|
|||
Injectors from India have had problems for a while now. I would highly recommend a set of Monark injector nozzles.
|
#3
|
||||
|
||||
With Bosch injectors,you need to check pop pressure.Don't use them with veggie.Monark nozzles are the best.
__________________
1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt |
#4
|
|||
|
|||
Over here in the Uk the Bosch made in India are not known to last long.
My set of recon injectors in a 94 Bmw 525tds lasted 41k before they started to go bad. Took them apart to find made in India nozzles. Ok no big deal because they are cheapish to buy but 41k is not very good. |
#5
|
|||
|
|||
I think I am going to rebuild my old injectors when I get home. I can throw these new ones in an SD that I have. Poor SD it always gets the hand-me-down parts.,
__________________
1985 300 TD 448K 1984 300 TD 278K 1983 240D euro 240k 1994 f-250 idi turbo 330K 1986 f-350 IDI 1987 F-350 IDI 1985 JD 1050 4wd 1965 IH 3660 |
#6
|
||||
|
||||
Get rid of the veggie oil & your problems will go too!! If you want to save on fuel and the world, buy a bicycle and a draft horse!!!!
Dont put WVO in your JD, you will stuff the pump & injectors. Sell your WVO to some idiot & buy proper fuel. The Indians dont bother with WVO, they sell it & use proper fuel. You only get what you pay for when you buy 3rd world stuff!! -Junk!! Down here we wont even buy Korean Muzzo stuff & its made under license from Mercedes.
__________________
Grumpy Old Diesel Owners Club group I no longer question authority, I annoy authority. More effect, less effort.... ![]() 1967 230-6 auto parts car. rust bucket. 1980 300D now parts car 800k miles 1984 300D 500k miles ![]() 1987 250td 160k miles English import ![]() 2001 jeep turbo diesel 130k miles ![]() 1998 jeep tdi ~ followed me home. Needs a turbo. 1968 Ford F750 truck. 6-354 diesel conversion. Other toys ~J.D.,Cat & GM ~ mainly earth moving |
#7
|
|||
|
|||
Quote:
I also gave up arguing with people online about the subject. ![]()
__________________
1985 300 TD 448K 1984 300 TD 278K 1983 240D euro 240k 1994 f-250 idi turbo 330K 1986 f-350 IDI 1987 F-350 IDI 1985 JD 1050 4wd 1965 IH 3660 |
#8
|
||||
|
||||
Quote:
I have also read that the Rebuilt Injectors themselves are rebuilt overseas some place.
__________________
84 300D, 82 Volvo 244Gl Diesel Last edited by Diesel911; 12-28-2009 at 11:05 PM. |
#9
|
|||
|
|||
This rebuild quality thing concerns me. I have been pondering replacing the injectors in the W140 with the Bosch rebuild units (NA35X) that are supposed to have the better spray pattern. If these turn out to be crappy as some have suggested the Bosch rebuilds are I'm not going to be happy about it.
If I could find Monark nozzles around here I'd likely buy them and have the local Bosch shop do the work, but I don't know anyone who carries these. thanks for posting up about this! steve a |
#10
|
||||
|
||||
I guess what is left is to check your Valve Timing (timing chain stretch) and retime your Fuel Injection Pump to see if it helps your mileage situation out.
I am guessing you did the Valve Adjustment already.
__________________
84 300D, 82 Volvo 244Gl Diesel |
#11
|
||||
|
||||
shadetree,
I dont use scare tactics! If some one has years of experience then how come they (you) are having injector trouble? We use about 3-5000 liters (>1000 US gallons) of diesel a month here. We have looked at WVO etc. The only successful trial we have done was on a 50/50 blend of used atf/diesel, but we cant get our hands on enough used atf to make it worth our while. My old 300d did nearly three times the mileage that your TD has done. The injectors have never been out of it. If you look on this discussion site 99% of the threads with injector/ fuel problems are on or have been on WVO. When some one can come up with a high mileage diesel (>600k miles) that has run all that time on WVO with out problems, let me know. Until then I think its best that I keep WVO away from diesels like $500k+ scrapers & dozers that need to be reliable. I cant afford to have them broken down under some shady tree !! I think my 123 & 124 deserve better also. For those who like to play and enjoy pulling their fuel system to pieces, good luck, I prefer not to continually be banging my head against a brick wall. Long term true down time and maintenance costs make even free WVO uneconomic. We have done the sums several times and have the incentive ($$$$) to make changes if it is worth it.
__________________
Grumpy Old Diesel Owners Club group I no longer question authority, I annoy authority. More effect, less effort.... ![]() 1967 230-6 auto parts car. rust bucket. 1980 300D now parts car 800k miles 1984 300D 500k miles ![]() 1987 250td 160k miles English import ![]() 2001 jeep turbo diesel 130k miles ![]() 1998 jeep tdi ~ followed me home. Needs a turbo. 1968 Ford F750 truck. 6-354 diesel conversion. Other toys ~J.D.,Cat & GM ~ mainly earth moving |
#12
|
|||
|
|||
Quote:
I checked compression when installing new injectors and have consistantly around 400 psi. I think I am going to let Sean rebuild my old injectors and put these bosch rebuilds in my SD. If nothing else it will be an interesting experiment to compare the two.
__________________
1985 300 TD 448K 1984 300 TD 278K 1983 240D euro 240k 1994 f-250 idi turbo 330K 1986 f-350 IDI 1987 F-350 IDI 1985 JD 1050 4wd 1965 IH 3660 |
#13
|
||||
|
||||
Decrease in mpg
While you replaced the injectors -- I would wonder if it was the blended fuel that is contributing to the lower mpg. Also it may be something as simple as tire pressure -- You add these things up and before you know it you have reduced your mpg.
these are just thoughts. 3pointstar
__________________
![]() |
#14
|
|||
|
|||
Quote:
![]() I ran 35 psi all around in the tires. I have also had a much rougher cold idle since putting in the new injectors. It acts like an air leak, but I replaced the return lines with the injectors and don't see any leaks. Priority now is to get all the road salt off the car. I cringe everytime I take one of my old southern cars up there.
__________________
1985 300 TD 448K 1984 300 TD 278K 1983 240D euro 240k 1994 f-250 idi turbo 330K 1986 f-350 IDI 1987 F-350 IDI 1985 JD 1050 4wd 1965 IH 3660 |
#15
|
||||
|
||||
Winter diesel?
__________________
1982 240D, sold 9/17/2008 1987 300D TurboW124.133 - 603.960, 722.317 - Smoke Silver Metallic / Medium Red (702/177), acquired 8/15/2009 262,715 and counting ![]() |
![]() |
Bookmarks |
|
|