Lb7 fuel leak on passenger side
- Thread starter JudeH
- Start date
30 lb/ft sounds right. but you can't really check that by just throwing a torque wrench on it as you would have to overcome the breakaway torque. if you where getting movement at less the 30 lb/ft then they were definitely loose. I'm pretty sure I had to go higher then spec on mine to get them to seal but mine where also used so that may have played a part. feel free to go a little tighter if needed but don't remove or loosen them or risk getting rust contamination in the injector
If they were leaking you would definitely see fuel around the top of them. Check all the rubber lines in the valley.
when I look under the truck it is running down the back of the engine, passenger side.
more detail please. from the center of the block as if its out the valley? off the side of a head?
you will need to pull the inner fender out to get a good look.
the fuel is running on the back of the block but it's leaking more on the passenger side of it. Not down the middle where the valley is. I dont think its coming from the valley. It looked like it was leaking on top of the valve cover right under the fuel rail. looked like the fuel was dripping down the valve cover and then off the passenger up pipe that is connected to the EGR cooler. This is a California truck, so it does have all the EGR crap
The fuel pressure sensor is at the very back of the rail. i would check that for any fuel coming out of it or from the threads.
if you had a means of increasing rail pressure to 160mpa or easily unplugging the FPR while its idling, you will quickly find a high pressure fuel leak.
Either way, get a flash light and start crawling all over back there with it running so you can find the leak. im betting its either the sensor or fuel line at the rail.
if you had a means of increasing rail pressure to 160mpa or easily unplugging the FPR while its idling, you will quickly find a high pressure fuel leak.
Either way, get a flash light and start crawling all over back there with it running so you can find the leak. im betting its either the sensor or fuel line at the rail.
yeah, for the LB7 the sensor is on the junction block, along with the relief valve and some high pressure lines. there is also the return line from the cp3 that runs down the center to the back and over the driver side