Injector Pump out of spec should i even run it?

[vw-tim]

So the injector pump is out of spec. Its worn out and i have to set it at 1.28mm to get it to run and idle good. Im havent driven it at all but would this cause any issues with the engine? Should i just look at getting a rebuild injector pump or saving some money and buying another used injector pump that is still in good spec? Its a 1.5L injector pump. It doesn't leak at all but im just wondering is it bad to use i understand i wont get as good of mpg or as good of power but i dont think im ready to just spend $500 on a rebuild pump. looking for feedback thank you!

[TylerDurden]

Could be your injectors are out of spec...

[vw-tim]

Could be your injectors are out of spec...

how can the injectors be out of spec? Just worn out parts on the inside?

[8v-of-fury]

Could be your injectors are out of spec...

how can the injectors be out of spec? Just worn out parts on the inside?

You got it Pontiac, as they wear it takes more advance to make them pop at the right time.

[vw-tim]

Could be your injectors are out of spec...

how can the injectors be out of spec? Just worn out parts on the inside?

You got it Pontiac, as they wear it takes more advance to make them pop at the right time.

interesting how can i tell if the injector is good or bad then? and also what is the best way about repairing them would i have to rebuild the whole injector? or just the spring on the inside?

[mystery3]

There's a how-to thread around here somewhere on building your own pop tester to check the opening pressure and spray pattern and such.

[homerj1]

There's a how-to thread around here somewhere on building your own pop tester to check the opening pressure and spray pattern and such.

http://members.shaw.ca/vwdiesel/DIY_Inj_Tester/DIY_Injector_Tester.html

[TylerDurden]

Lotta variations on the theme... google image-search "injector pop tester".

Here's one:



The reservoir is bigger than needed, but it was in the shop, lol,  I'll probably change it for a craft-store glue bottle.

[vanbcguy]

...or even better, make the injectors spray in to the reservoir....

[vw-tim]

is there a way to make a pop tester with out having to weld on a piece? I guess ill hit up my local vw shop and see if they can pop test them for me

[TylerDurden]

IIRC, the folks using a "porta-power" type of hydraulic tool usually don't have to weld fittings, they might be obtained cheap on Craigslist or the hot-tool stores... er, I mean pawn-shops, etc.





The bottle-jack is cheap, but often needs a fitting added.

I braze stuff like this more often then weld. Easier and less chance of damaging the goods.


I was planning on putting the injector high enough to spray into the rez, but took the lazy route. Maybe I'll do that if I upgrade.

[vw-tim]

IIRC, the folks using a "porta-power" type of hydraulic tool usually don't have to weld fittings, they might be obtained cheap on Craigslist or the hot-tool stores... er, I mean pawn-shops, etc.





The bottle-jack is cheap, but often needs a fitting added.

I braze stuff like this more often then weld. Easier and less chance of damaging the goods.


I was planning on putting the injector high enough to spray into the rez, but took the lazy route. Maybe I'll do that if I upgrade.

hmm i guess ill be on the look out for a porta power jack like that i harbor freight has this..

http://www.harborfreight.com/4-ton-heavy-duty-portable-hydraulic-equipment-kit-44899.html

also found this the price is a lot better!

http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?productId=100616382&storeId=10051&langId=-1&catalogId=10053&MERCH=REC-_-product-2-_-100595209-_-100616382-_-N#.USerD6XCaSo

[92EcoDiesel Jetta]

...or even better, make the injectors spray in to the reservoir....

And dump dirty fluid into the injectors?

[homerj1]

...or even better, make the injectors spray in to the reservoir....

And dump dirty fluid into the injectors?

Yea, good pt.  Dirty = Bad


I sort of digress, but,

When buying a used diesel vehicle, I always ( after about 1000 to 2000 km of driving) cleaning the nozzles with Diesel Purge in a closed loop manner. ( looped the diesel fuel return hose from the IP back into the Diesel Purge can)

I always find it makes a big difference with: throttle response, performance and economy and engine noise.


But, I did find that new injector nozzles on my AHU made a big diff. That was without calibration - just a nozzle size increase from stock to .205 Veg. nozzles

I never really thought that injector size and cleanliness on a diesel (except for the extremes - too dirty or too big - "that's what she said" ) was that super important.

 But it clearly is.

[TylerDurden]

And dump dirty fluid into the injectors?

Nah, inline filter between the rez and the pump.

Good idea to circulate the fluid a few times through the system without an injector in place, to flush the crud out before testing.