05 GMC Injector Issue.

[rsaint]

Have a 05 Gmc dmax with 380k bought it with a injector issue bought 8 new Bosch injectors and still shows #7 as a issue and a hammer noise, verified correct injectors
whats the chances of having another bad injector in same spot. Also with the Tech 2 hooked up as soon as rpm goes up you cannot monitor injector rates.

 

[Qdingo]

Have a 05 Gmc dmax with 380k bought it with a injector issue bought 8 new Bosch injectors and still shows #7 as a issue and a hammer noise, verified correct injectors
whats the chances of having another bad injector in same spot. Also with the Tech 2 hooked up as soon as rpm goes up you cannot monitor injector rates.

Check wiring at that injector especially at the 90 degree bends
move the harness around and see if it changes

 

[tex78]

Would have a Injector code if it was connector to injector, which kills all 4 in that loop

That's adding fuel, did you replace the high side lines when you did injectors??

And you have programmed the flow rates with tech 2 into ecm and gpcm??

 

[tex78]

But if it has original connector to cylinder 2 and 7, I. D be updating them soon

 

[new indyguy]

My 2005 LLY had the same issue this summer. The individual injector wire harness on #7 was pooched. Wire was broken internally. I could jiggle the wire and it would act normal. Went for a test spin and as soon a I hit a bump or 2 it would act up again.
Ended up changing #2 and #7 injector wire pigtails and all is good. Cheap fix.

 

[Mountainman52]

My 2005 LLY had the same issue this summer. The individual injector wire harness on #7 was pooched. Wire was broken internally. I could jiggle the wire and it would act normal. Went for a test spin and as soon a I hit a bump or 2 it would act up again.
Ended up changing #2 and #7 injector wire pigtails and all is good. Cheap fix.
https://prosourcediesel.com/wp-cont...IL-GENUINE-BOSCH-CONNECTOR-282250480971-2.JPG

Thats the fix no need for new injectors , been there done that vary common problem on the 05 Dirty max. Can order online from Amazon !

 

[rsaint]

Check wiring at that injector especially at the 90 degree bends
move the harness around and see if it changes

\Will check them my buddy with tech 2 just informed me of 2-7 injector issues

 

[rsaint]

Would have a Injector code if it was connector to injector, which kills all 4 in that loop

That's adding fuel, did you replace the high side lines when you did injectors??

And you have programmed the flow rates with tech 2 into ecm and gpcm??

No we never changed high side lines, only code that come up once was 7 misfire, I would have to see if he did program them,
he uses his tech 2 for when he does dmax conversions into surbrbans when he has to marry differnent modules.

 

[tex78]

But that's the same ****ty ends as original


Get the updated ends, relocates the wiring and will never happen again, those ones posted above it will happen again, and who knows when

 

[rsaint]

Thats the fix no need for new injectors , been there done that vary common problem on the 05 Dirty max. Can order online from Amazon !

When I picked up truck from a guy gm told him injectors were done so I got truck cheap its a 3500 rdw 380km
on it if it works out going to sell my 16 3500.

 

[tex78]

No we never changed high side lines, only code that come up once was 7 misfire, I would have to see if he did program them,
he uses his tech 2 for when he does dmax conversions into surbrbans when he has to marry differnent modules.

Well could have crap in the new injectors now

The lines rot from the inside out, rust and crap

Diesel has lots of moisture in it, and them lines take a chit kicking

 

[tex78]

No we never changed high side lines, only code that come up once was 7 misfire, I would have to see if he did program them,
he uses his tech 2 for when he does dmax conversions into surbrbans when he has to marry differnent modules.

Was it a p0300 and p0307 code



Or p2143 kind of thing ( don't recall the actual code for injector group fault misfires)

 

[rsaint]

Thats the fix no need for new injectors , been there done that vary common problem on the 05 Dirty max. Can order online from Amazon !

Well It will have new injectors and exhaust manifold and once the wiring is sorted out will downgrade from the 16 denali

 

[tex78]

P0202 injector control fault, and p2149 group fault if it's the wiring connectors

 

[rsaint]

Well could have crap in the new injectors now

The lines rot from the inside out, rust and crap

Diesel has lots of moisture in it, and them lines take a chit kicking

Had thought about it probably true we sprayed and cleaned them out
Will have to see if he knows the code that came up.

 

[rsaint]

P0202 injector control fault, and p2149 group fault if it's the wiring connectors

I don't think they come up

 

[tex78]

I don't think they come up

Like I said, 99% of the time if the balance rate shows its not a circuit fault but mechanical

So if flow rates are not programed right, could screw it up

Otherwise max spec is + or - 4 mm,

 

[tex78]

And 1-3-6 are all past what I would say is good, that being 3mm

I find after 3 it's too much for ecm-ficm to control and milage gets bad, washes cylinders out ect

 

[rsaint]

And 1-3-6 are all past what I would say is good, that being 3mm

I find after 3 it's too much for ecm-ficm to control and milage gets bad, washes cylinders out ect

Ok it could be over buddies head may have to take it into dealership, also it would not start at -20 without being plugged in also have a video of a cold startup and the noise but not sure how to post it.

 

[tex78]

Ok it could be over buddies head may have to take it into dealership, also it would not start at -20 without being plugged in also have a video of a cold startup and the noise but not sure how to post it.

I've had a lbz before that would not start below 0 at all, unless plugged in

Was injectors that was bad in it