Ok after doing the cp3, still only getting 19,650 at wot..what else possibly could it be? Injector rates are all good.
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LBZ: New cp3,still p0087!?!
- Thread starter Devon
- Start date
I have had a race valve for over 25,000 miles and have not yet had an issue with it... but it is def. worth ruling out.
Some people don't have any problems with them like nick said but I've had 2 llys that were falling off rail just like yours, we put a stock shimmed valva in and it fixed it. Jmo
Ok I may try that.anywhere I can get a stock valve for cheap? Also,what else could I check besides that and injector return rates? My airdog is pulling fuel so that is working right.. Maybe install a sump on the tank?
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Damn man that sucks. X3 bottle test. What regulator do you put on new cp3? We both need to check lift pump pressure also.
I've got a buddy with a lmm and the same mods as me except he has the ppe race valve and ported fittings. His truck constantly throws the P0087 low fuel press code. May have to try the stock valve with a shim to see if it helps.
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Yea this is really starting to piss me off, on top of that I have a boost leak coming from the intake bridge I belive. I don't think its the injectors because on the smaller tunes it holds good rail.
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Robs as of right now, also have dustins too..robs race tune desires 27,500 from what the edge cts reads Only getting 18-20k though
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So more than likely it is mechanical.. I was thinking it could be something in the tune... do the bottle test it is easy.
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I had a race valve in and the truck ran fine then one day at highway speeds truck fell on it's face and threw codes limped to 55 mph and I had to stop to get it to move again. Put the rce valve out and the truck runs fine I only get the code on the race tune now.
Could my injectors be shitty? Even if all the balance rates where ok? Also would I benefit from a hellmann sump?
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See above, and yes they could be bad. a hellman sump isnt a bad idea but not required GO DO A BOTTLE TEST FIRST!!!!!