LaXcAt

I cant get my hatch to start

Stock ECU with Crome Basemap by Xenocron

New RC SL4-750 injectors

New Walbro 255 Fuel Pump

AEM regulator (on rail)

i am getting spark

motor is turning over

fuel pressure at the rail is 45 PSI

fuel comes out the return line if i pull it off the regulator

when i take out an injector there is only fuel on the rail side of the injector

voltage to the injectors is 12V

tried two different main relays

tried both chips that came with the ecu



Ideas ?

TIA


Modified by LaXcAt at 11:49 AM 12/9/2007

boosstboy

need to check your trigger to the injectors, their gound switched so you will always have 12v, but may not get a signal to fire. easiest way is to get a noid light from autozone to check signal from ecu.

LaXcAt

i went to autozone but the only noid light kit they had had lights for Bosch PFI, Ford TBI, Geo TBI, GM PFI, GM SCPI, GM TBI do any of these work for hondas

93supercoupe

i think any noid light will work aslong as its in the votage range of the injector.

Are the chips blanks?Try a stock ECU and stock injectors.

Check ur cam timing and make sure ur ign. timing is synced (once its running)

boosstboy

you have to use the noid light for that ohm range, sl4's are high impedence 12-16 ohms. the kit will work. just find the light that fits the pins correctly you can also measure the noids to see each's ohms.

nasteboyii

r u running a resistor box?
is the connection at the engine harness on the driver side plugged in all the way
any broken wires or cut wires at that connector (the 8 wire connector with all yellow (black strip) wires ) with a connector on the end that s flat(ending) that connectors all together

hope this helps

dan

LaXcAt

no resistor box (i dont think i need one), the connection looks fine, going to try and test with the noid light

LaXcAt

I tested with the noid light, the noid light flashed for all injectors (so they are getting a signal from the ECU)...what should i try next?

boosstboy

i you have spark and fuel, check your timming and make sure you didn't foul the plugs so bad it won't start(flooded). see noid lights are your friend

LaXcAt

but when i took the injector off the head side was dry, i dont think they are spraying any fuel...

boosstboy

did you pull out the spark plugs to see if their wet with fuel after cranking? if you have pulse to the injectors and fuel pressure to them they should be firing. did you try holding the thottle open slightly will cranking? you may need to verify good compression. what was done to the motor from when it ran, till now.

LaXcAt

i pulled a plug out, its dry, i doubled check timing again , still not starting....still no gas out of the injector...

Xenocron is going to send me a new chip so maybe that will help

the motor is brand new, build ls/vtec....

boosstboy

well i hope when you get the new chip everything is ok. you might just want to check over any grounds for loose or bad connection.

LaXcAt

i checked the ground on the valve cover, thermostat, tranny is there any more?

boosstboy

no, thats it for the motor side of grounds. r u sure your not running a resister box, cause the sl4's are high ohm's, unless your 96-00. what year hatch is this?

LaXcAt

the hatch is a 94, i just plugged the injector into the stock clips, do i need a resistor box?

LaXcAt

new chip still not working....no CEL while cranking

i just measured the resistance of the RC's and the stock injectors the resistance is the same....

DA_HONDA_BOY

turn the key let it build fuel pressure and take a 9v batt put it on the #1 injactor and if you hear fuel going in the intake then you have a wiring issue

LaXcAt

i did the test with the battery, the injector sprays when i connect it directly to a battery. what sort of wiring issue would cause that, what should i look at.

DA_HONDA_BOY

first check the fuse under hood and dash

did you change the injactor plugs


Modified by DA_HONDA_BOY at 4:10 PM 12/19/2007

DA_HONDA_BOY

try and turn the wires around on the fuel injectors plugs thats if you changed the plugs for the injectors

LaXcAt

i rechecked all the fuses, they all seems ok, anything else i could check....

CRXWOLSKI

Hi sorry to bring this back up but did you find the problem? Im having the same problem with injectors not firing.

Scheizty

http://www.robietherobot.com/s...e.htm

Regarding the injectors, it looks like your hatch has saturated injectors, which have a higher impedence. Most larger injectors use peak and hold and have a low impedence, which means you will fry your ecu if you aren't using a resistor box or high impedence injectors

Also, does your map compensate for the larger injectors? If that is a stock map, it isn't going to run well, if at all.

Sr420Det

Hate to mention it again put try your stock injectors and ecu. You do need a resistor box for those injectors and you can fry your ecu. Listen to this guy ^^^^^^