911 no start fuel leak

[TORCH]

I've been having issues with a fuel rail pressure code for years I believe the CP3 is toast as it has been getting worse. I installed a lift pump which did indeed make it slightly better however it would still go into limp mode while on cruise control only, so I know I didn't solve the problem just kicked it down the road a bit longer. Saturday night on the ride home from the bar I could smell fuel pretty bad and I really couldn't give it any pedal at all. sure enough I used nearly 3/8 of a tank in a 35 mile run back home. Almost wiped out a couple times at 70 on the highway due to all the fuel on my tires. I went out the next morning to move it and it won't start now. I bled it out and nothing still. I don't see a fuel leak when just running the lift pump. of course it wont start so I don't know if its downstream from the CP3.
need ideas as to what it could be? Cp3 finally blew up? line from CP3 to header?
I need my truck which is why i've been limping it along for entirely too long.

 

[TORCH]

truck has 230000 miles, I should also add that the fuel leak appears to be coming from the back/ top of the engine

 

[2004LB7]

Cp3 sits in the valley of the engine up near the front. And of course the
Fuel lines run to and from it.

I don't think we can be much help here finding a leak. This is something you will have to do.

It is possible it is on the high pressure side and that is why you are having a hard time getting it started

Check all the hard lines from the cp3 to the rails and injectors.

 

[ZeroGravity58]

Do you have a scan tool to hook up and see what the rail pressure is when you are cranking? If it's to low the injectors won't fire. You would either have a cp3 or a bad injector.

 

[TORCH]

thanks for the input guys. I have been doing a lot of research etc. I really think its the CP3 I'm going to take it apart far enough to find exactly where its leaking from. May be the regulator but likely the CP3. hoping it didn't fill the injectors with crap.

 

[TheBac]

Bet the Cp3 blew out a plug.

 

[TORCH]

Bet the Cp3 blew out a plug.

what "plug" would that be? one on the rail? on the pump itself? Im suspecting maybe the pressure regulator... could be an injector line too I guess but either way Im sure the CP3 is junk. its had a PO087 for years. and like I said even after the lift pump the cruise control can set off the PO087 :roflmao:

 

[2004LB7]

Freeze plug on the body of the pump. Round plug by regular

When you get fuel running down the back center side of the engine, often times it is the freeze plug that let loose.

 

[TheBac]

Thanks 2004. That was what I meant.

 

[TORCH]

indeed it was a plug or two! lots of metal shards in the valley too. the plug was forced out by the parts.... I should probably pull the injectors too i assume now that there's metal parts everywhere. this sucks!!!

 

[TheBac]

Ouch. This is one of those times I wish I were wrong.


Treat it like an LML CP4 disaster....everything in the fuel system after the CP3 has to be cleaned/checked or replaced. I would send the injectors out to be cleaned and tested.

 

[TORCH]

Thanks man! will do! Its my own fault. It has been having issues for years, then got so bad this past winter that I couldn't even haul my sled trailer home from camp. That's when I should have replace the CP3. Instead I installed a lift pump. It made it drivable at least but like I said you had to be easy with it. Even the cruise control would set off the PO087. then about a week before this happened I saw an LBZ for sale for 4500. when I asked the guy he said the CP3 had granaded but he didn't have the money to replace / clean the entire system and just put it back together. won't run as the injectors were full of sh*t. I said to myself "boy I should really get this fixed before that happens to mine" :roflmao:

 

[2004LB7]

If this was on my truck I would pull all the injectors, open them up and attempt to clean them myself. But don't recommend it for anyone not familiar with the inner workings of the injectors

Run a rubber line between the fuel feed and the high pressure side, bypassing the cp3. then run the lift pump and flush out all of the fuel lines, hard lines high pressure rails, etc. Put catch cans under all of the injector feed lines to catch the fuel

There is a small chance that not much or anything got to the injectors. If the plug was leaking while the pump was grinding itself apart then most of the junk may have gon out the return and the leak but it is best to clean everything