rb26 swap starting problems (fuel injectors???)

[drftnrps13]

ok just tried to start my rb26 in my s14 for the first time. it wont start. i get spark but no fuel. futher research shows the following- fuel pump works, i get 50psi at the regulator, and i have injector firing signal and injector 12volt, and the injector clicks when told to fire! so this is what i did, i took out the spark plugs, i cranked the engine and looked/smelled for fuel vapor, nothing. now with a voltmeter/test light i checked the injector signals. each injector has its 12volt power. while cranking the engine the injectrs get ground out according to firing order. but no fuel spray! so what i did was turn the key on and let fuel pressure build to the set 50psi. i then supplied my own 12 volt to the injector and then groung the injector. the injector makess its distenct click as it opens but no fuel sprayed out??? so im leaning towards the injectors are clogged. sound right to you? let me know what u think and how to resolve this problem. thankspaul

[HxC_Nismo]

did you wire up your fuel injector resistor box??? if not you need to do that and if you dont have one a 90-95 v6 honda accord injector resistor box will work. you only need 44 base fuel psi w/ engine running. and if your injectors are clogged i have my 440cc stock rb26 injectors that you can buy $120 shipped in the u.s.

[drftnrps13]

yes i have resistor box wired in. the injectors u have, they work right? im just worried to buy used injectors and have the same thing! im kind of leaning to send them out to get cleaned and flow tested. but $120 is great. anyone eles have an opinion on what the problem could be?

[HxC_Nismo]

the injectors only have 31k miles on em, just email me if you want em [email protected]

[HxC_Nismo]

but i think your injectors are bad (sticking closed) since everthing else checked out. plus one thing i bet that your motor has been sitting in a junkyard in japan for years before it fell into your hands. but my injectors are good cause i started the motor on the subframe when i got the motor and it ran fine before i swapped it and upgraded on the engine.

[Joe]

the odds of all 6 injectors being stuck closed are about 10,000 to 1.... i think something else is going on.

[gomer23]

Me and DEturbine are working a RB25 swap for someone and we are having a very similar issue. Power to the fuel pump, power for the injectors, spark, but the injectors aren't spraying fuel either.

[kjlindgr]

the odds of all 6 injectors being stuck closed are about 10,000 to 1.... i think something else is going on.

I just finished a K24 swap into a Del Sol where all 4 injectors were stuck and took some lovin' to unstick them. It's more common than you might think for engines that have been sitting for years.

[lilskyline240]

are u sure u dont have ur fuel lines on backwards? If they are on backwards all ur doin is pressurizing the line up to the FPR and no fuel will be in the rail. Ill bet this is what u did

[drftnrps13]

i know the lines arent backwards for sure!!!! i check that first. but should i get the injectors cleaned and flow test to be sure. it only cost like $130

[gomer23]

are u sure u dont have ur fuel lines on backwards? If they are on backwards all ur doin is pressurizing the line up to the FPR and no fuel will be in the rail. Ill bet this is what u did

I thought that too on the car we are going on but we switched them and still nothing.

[DETurbine]

Yeah, Gomer and I tested the power to the injectors and pump and all turned out correct. Took of the feed line to check the pressure behind it and there was plenty. Kept taking the plugs out and there was no fuel going spraying into the cylinder. The only thing I can think is either the injector are bad or something is wrong with the ecu and it is not firing the injectors for some odd reason. Not sure what else it could really be. Very similar problem as yours. We got spark, but no fuel. Lines are on correctly, just the injectors are not firing like they should be. I am sure it has happened before, but it is a pretty rare occasion that all 6 injectors are clogged or bad. I am thinking it is something else.

  

[lilskyline240]

no way all the injectors are clogged. Try grounding the wire on the injector without using the ecu to see if it fires?

[DETurbine]

no way all the injectors are clogged. Try grounding the wire on the injector without using the ecu to see if it fires?

that is our next step on our side. Then again, normally if the ecu is the problem the whole ecu would be bad. It is giving the ignition the spark that is needed.

[lilskyline240]

ever think it could be the wrong ecu? i had an ecu that would prime the fuel pump but didnt work anything else

[Carl H]

sounds like bad coil drivers...quick test is to swap ecus into a car that does run.

[HxC_Nismo]

i have a good spare stock r33 rb26 ecu if you need one

[drftnrps13]

pay attention to what i posted please!!! the ecu gives the injector a 12volt and then grounds the ecu to fire it! both signals are there when we tested for it! the ecu works. we even by passed the ecu and gave the injector a 12 volt and then grounded it our self. the injector clicks open but nothing comes out!!!!! the power and signal are there the injector clicks open when told to by the ecu but no fuel!!!!

[gawdzilla]

from your description, the only thing that can be wrong is the injector itself then

[lilskyline240]

or there is no fuel in the rail

[gomer23]

Just an update, the car we were having this trouble on started up today. All 6 injectors werent firing.

We "jumpered" the first injector to the battery and it made a click right away so we tried to start it a couple times, made a little more noise but didnt start. We check all 6 plugs again and the only one with fuel was the one we jumpered. So we did the same to the other 5 injectors and it fired right up. 2 or 3 of the injectors took a couple of taps to the battery before they clicked open. So you might want to give that a shot on your injectors.