lb7 injector balance rates weird...

[Mpsoldier]

ok guys i have a 2002 lb7 my towing rig stock everything getting fuel in crankcase ok jump to conclusions injectors right well my balance rates are within specs... the read as follows in -neutral-
#1=-2.19
#2=0.78
#3=-1.78
#4=1.17
#5=-0.94
#6=0.89
#7=-1.81
#8=-.89
just seeing any feed back on this my other truck read alot higher when they went bad in the 4 to 5 but the worst one is number #1. in drive they are a as follows
#1=-0.56
#2=-0.08
#3=-0.80
#4=1.54
#5=-0.58
#6=0.11
#7=-0.68
#8=1.04
YES THE TRUCK IS UP TO TEMP.
Feed back please. also one code p1093 pcm

 

[Hole Shot]

you can do a return test on each side to see how much you have but it is best to do all eight.

 

[TeaBagger2006]

Return lines may be leaking

 

[Mpsoldier]

ok guys will do that next. but balance rates are to low to be injectors correct?

 

[Mike_S]

ok guys will do that next. but balance rates are to low to be injectors correct?

Balance rates are an idicator, but not a difinitive yes or no on bad injectors. There are some other tests to be done, such as return rates as mentioned above.

 

[Mpsoldier]

ok been searching for a while on how to do a return rate test. can someone find or explain to me how to do it.
Thanks.

 

[Hole Shot]

on the back of the driver side head remove the banjo bolt on the front side of the right head if you have a lot of fuel coming out of one side you could start with that side. here is something else to think about if the banjos at the injector are real lose you may not have a high return amount.

 

[Kspen90]

on the back of the driver side head remove the banjo bolt on the front side of the right head if you have a lot of fuel coming out of one side you could start with that side. here is something else to think about if the banjos at the injector are real lose you may not have a high return amount.

do you have pics of the location of the bolts?

 

[Mpsoldier]

its under the valve cover correct? also is there another way of testing them other than that

 

[Mike_S]

do you have pics of the location of the bolts?

The one on the right side (passenger side) is on the back of the head, right by the bottom rear of the intake manifold. The one on the left side is in the same spot, only the head is flipped around. Make sense?

 

[JoshH]

The one on the right side (passenger side) is on the back of the head, right by the bottom rear of the intake manifold. The one on the left side is in the same spot, only the head is flipped around. Make sense?

You're backward. The driver's side is at the back of the head close to the turbo. The passenger's side is at the front of the head kind of behind the fuel pressure test port.

 

[JoshH]

do you have pics of the location of the bolts?

Take a picture of your motor, and I'll draw you a diagram.

 

[Mike_S]

You're backward. The driver's side is at the back of the head close to the turbo. The passenger's side is at the front of the head kind of behind the fuel pressure test port.

Ding. LOL! Sometimes i dislex things...i shoulda known that cause thats wherre my fuel leak was after i built my engine...on the right front of the head...the return line. Der.

 

[Mpsoldier]

How do you conduct the test pull off the valve covers then reinstall everything so you can crank it over to see where its leaking? How do you know how little or to much fuel is correct coming out of the banjo bolt? I have done injectors before but mine also were shot and very easy to tell lol.

 

[Hole Shot]

With fuel in the oil you can bet if you fix one side it won't be to long before the rest are the same. And the banjo bolts are outside the valvecover. If you have the money put all 8

 

[S Phinney]

The specs would be anything more than 8 CC would be excessive from what I recall. If they are leaking and haven't been into the motor your almost guaranteed its the injector and not a line.

Sent from my DROID RAZR using Tapatalk

 

[Mpsoldier]

Just going to do injectors easy expensive route time is money.
going to go get those LIFETIME WARRANTY!!! ones lol wut a joke:roflmao: