new injectors smooth 3 mi. then rough???
 

help:argh:just replaced all 8 injectors on my 2002 dmax thanks to some great info on this site:rocking:never heard such a smooth idle i couldn,t take off gentely enough to keep the tires from chirping, well that lasted about 3 miles and i could feel her slowing to respond first hill check eng light poped on what other than p1093:humm:so next day i pull pass side hi presure lines no gunk!did nothing else but put back together and same thing great for couple miles and then:moon: opened drain on fuel filter......dry????? sorry for the long intro but anyone had this or any ideas? thanks p.s. she's bone stock 160,000 miles

have u changed ur fuel filter? thats where id start.

ya i got new fuel filter and oil change when i replaced injectors. i noticed the prime pump will not stay pumped up tight even for a couple minutes.i primed and bled and then opend drain and got o good flow of fuel but after running for a while its dry?dont get it

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hey just checkin back in could this be a fprv issue? any way to do any kind of testing with out going to a dealer or shop? heard about a vaccume test but it wasn't real detailed stuff, anyway if you have any input much thanks

you have an air leak some where.....

thanks for responding big white, just got a diag. sheet that says the DTC p0087 and p1093 are caused by -exessive fuel return to the tank - a fuel injection pump failure - a fuel pressure regulator failure, but also says if you have to prime pump check for a restricted fuel supply line or an air leak. i definitly need to prime, so i think you are right, what is a good way to test for air leaks from point to point? are there any common places to check that you know of? thanks again i'll be back on it tomorrow , just want my truck back ya know?

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so i spent all day pulling parts and testing lines, tested fuel lines that are under the hood, lines were air tight from inlet through FICM and at the filter also checked right at filter housing inlet and outlet all OK.still wants to throw p1093. i did notice that the lines are basicaly dry when i pull them is that right? FICM wasn't exactly full either its driving me freakin nuts ya know it ran perfect after the initial inj. change what the :argh::scare2:any way any help would be awesom

it is very possible that you are getting air at the filter head, you can buy a rebuild kit for them to put all new seals in them, fairly common problem

Ok so got tired of beatin my head against the wall so i took it to the dealer had them hook it up to tech 2. they siad when they command 160 MPA the actual is 109-110. exactly what it was when i took it in befor i did the injectors, they recommend replace injection pump and retest oh and by the way throw a new FPRV while im at it:ouch: i guess they think im a cadillac owner with money to just throw around ? so iasked about leaks they said no internal or external leaks. my question i guess is what is more likely the cause? hate just guessin when parts are so costly. heard somthing about puting an industrial pump rather than replace FPRV? ill probably pull the parts and get to the FPRV and take alook dont know if there is any way to check the pump/FPRV once they are out? if any body can help this old nail bender out HELP!!!!

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hey real quick iwas just out kinda just lookin over stuff i notice that the short piece of rubber fuel line that comes out of filter head outlet and hooks almost right into hard line is pretty soft and i can collapse it preety easy with my thumb and index finger .could the high pressure be collapsing the hose under a load? :humm:

there is no pressure on any of the lines except the metal lines after the pump. they dont have a lift ump before the ip.

thanks for input, one more question if i need a new cp3 can i add a lift pump with out replacing it (cp3) if it is puttting out 109 MPA is it still working some what? i guess thats two q's but any let me know if you would

cp3 or not cp3 that my friends is the question :humm: