While my car was on the dyno it would rev up to ~5000rpm and then it would die down. It falls flat on its face, does not make any more power at all. The fuel is there, spark is also there and compression is good also. The car is currently running on e85 but it also had this problem with premium gas. Here is my set up

B18a1
Benson sleeves
balanced crank
blueprinted'
je pistons 9.1 compression
eagle rods
arp studs
port flow head/ port and polish
ferrea valves
dual crower springs
titanium retainers
BC stage 2 all motor cams
Garret 60-1 turbo
tial wastegate
synapse bov
Aeromotive 100 micron filter
aeromotive regulator
golden eagle fuel rail
rc 1000cc injectors


We though we were losing spark but i've changed the plugs twice and also changed the distributer along with the wires but i still have the same problems. Any ideas?

 

my guess was spark blow out but looks like thats not it. idk

 

the new dizzy you tried was it a oem or aftermarket one?
also what is the heat range and gap of the plugs?
msd coil?

 

what kinda of engine management are you using, what psi are you at, what map sensor are you running? you could be hitting boost cut. but your tuner should have caught that. or you could have a bad map sensor.

 

not sure if the dizzy oem i pulled it from my other integra. As for engine management we are using crome pro at 12psi. MAP is gm 3 bar. I would think my tuner would catch boost cut out, i have complete confidence in him. He wants to take the car in so he can fix the issue. I just rather try to fix it myself as i am broke right now from all the money that i have dumped into it lately.

 

Sounds like spark is blowing out. You should try running a number 9 heat range plug gapped no more than .025. I did that and didn't have a plug blow out problem til 27psi on a T60-1. Then I just closed the gap to .022 to fix it. That's with an Oem dist with a MSD cap and blaster coil.

 

we were using number 9's already. Right now i have 7's just to try but not dice. My tuner told me that my injector duty goes up really quick once the motor starts seeing boost. The fuel preasure stays constant where it should be. I checked the wires that go to the injectors and they are getting power. I'm thinking that my injectors might have gone bad

 

Did you gap the plugs or just pull them from the box and put them in? This almost has to be something spark related. Either you dont have a strong enough spark and it is blowing out OR the gap is too large and it's blowing out. I'm sure there are a few other options that could sneak into this scenario but start with the obvious things and work your way forward

 

we just pulled them out of the box and didnt change the gap.

 

gap them to 17 and give it a try

 

the number 7's or the 9's?

 

I run NGK BKR7e's (at least that was the part number when i bought a few packs) and gap them at .28. I'm making the power in sig and i haven't had any spark-related issues yet

 

i am also using those exact plugs. I gapped them to .28 just like you but it is still doing the same thing. One thing that i noticed is that my car idles at ~800rpm but when i put turn my headlights on it acts like it wants to die. The rps drop fast to about 3-400rpms

 

9 is a very cold plug and will cause break up just like to hot aof a plug would do. what does the a/f look like at that point? have you tried a second ecu? bad grounds? bad alt?

 

i don't know what the a/f looks like since we just changed it over to e85. The car does this on both my computer and on my tuner's computers. We ran new grounds a while back with new wires. Alternator has never given us problems and is pretty new.

 

what i dont understand is why my injector duty cycle jumps to >80% at the same time. I would figure that 12psi is not enough to need the injectors to cycle that high. It is only making 213hp because of this problem.

 

I can't believe no one's asked where you got/what fuel pump you're running?
Have you been monitoring fuel pressure/does the car have a gauge to do so?
Duty cycle for the injectors would decrease proportionally to fuel pressure if it were dropping off, right?

 

the pump is a walboro 255, fuel preasure stays constant, does not dip or rise up.

 

are you sure the MAP sensor is wired up correctly?

 

fuel pressure should be rising, thats one issue but not enough to hit 80% duty that quick

 

i'm starting to think that it might be something with my MAP. Mike you got a spare GM 3 bar i can borrow to check it?

 

do you need a resistor box for your injectors ??

 

sorry bro I only have stock MAP's laying around.

 

It looks like you've tested what you can... I would check out the MAP sensor issue. Although I would think you'd notice something like this from the get go, I suppose its worth a shot.

If you think your car doesn't have enough voltage, hook up a battery charger to it while your running it on the dyno.

 

That's what i was starting to lean towards now. I dont know if you can get a load test somewhere, but that might be something to look at...