I have a 1999 with electronic injection pump.
The guy I ordered the pump says I need a so called "Tech II" computer in order to get the new pump running and calibrated. I am far from any professional workshop. Will the engine run, if I just replace the pump without computer calibration?

 

I was able to mark the location (scribed a line from the IP onto the timing cover) and put the replacement in the same location. Truck runs fine as far as timing. Even if you're a little off, you can adjust it fairly easily a degree or two either way. I would say that a Tech II is not an absolute requirement if you're careful about the location.

 

Just remember, clean, clean, clean, CLEAN!! A "mechanic" I work with was doing a IP on a 94 6.5l and was a slob bout it. some little piece of dirt got in the injector line and made injector 3 hang open and it leaked and now I'm rebuilding it only after 45miles of driving.. It's not hard. just be clean. don't be cheap, get new injector lines. but don't blow them out with shop air(shop air is filthy). I use WD-40 or PB Blaster to clean the lines. Even new ones must be cleaned.

 

Thanks. I'll try that. The instruction written by "CRAZY" should explain everything, I hope....

 

Any quality scan tool will work for timing setting provided it displays TDCO value.

A KOKO procedure will force a timing relearn on an OBDII truck.

I have found when using a snap on MT 2500 if you enter the model year as 2000 no matter what year the truck is gives a more accurate reading for the TDCO value.

Stock setting is -0.25 to -0.75
Performance setting is -1.50 to -1.94

Autoengiuity or Carcode are both laptop based scan tools that will allow a TDCO relearn on command and are worth having if you plan to do your own maintenance.

I do not believe it is worth the risk to think the scribed line is good enough on any electronic IP replacement,a proper TDCO relearn needs to be done.

 

Hi, that just made my day... I don't have a MT2500... I have a smaller hand held scanner, but I don't know whether it "can do KOKO or TDCO" because actually I do not know what that is. Sorry, I'm not really a qualified mechanic ... The problem for me is that in the country I'm staying (Namibia), the next workshop that can do that kind of work is over 500 miles away. So if I do it with the scribed line, will I be able to drive that far and get it "calibrated" / TDCO-ed there?

 

My advice would be to get on ebay and buy a snap on mt2500 with a module good to 2000,or carcode or auto enginuity for your laptop/desktop.
EG:
http://www.ebay.com/sch/i.html?_trks...at=0&_from=R40

AutoEnginuity

OBD-2 Vehicle Explorer Scan Tool Browser

If you plan to do your own maintenance,you will really need a quality scanner.

KOKO is a procedure to make the ECM enter a relearn mode:
OBD2 KoKo procedure [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

TDCO is a a value assigned to the timing-Top Dead Center Offset,it is displayed in the scan tool data of a decent scan tool.

500 miles is a very long distance and depending on driving conditions could harm the engine.

Is there a US military base nearby where you could ask for help from the motor pool?

 

Do I have drain the coolant before taken the intake off a 6.5

 

No the intake is seperate from the frt coolant crossover manifold.

 

Just replaced the injector pump on a 93 gmc 6.5 and I am having a hard time starting the engine. I have blead the the fuel filter, cracked the lines at the injectors and still not geting fuel come out and yes I am cranking the engine over. I just was wondering how long dos it take take to bleed or am forget something Thanks