SR20det Not Starting!

[Djinfinit]

Hello guys,

I have been having problems with my sr swap, and that is it wont start. Earlier the starter wasn't turning over so I was confused cuz it was working fine before. So i gave my dash a swift kick in the driver side and the starter started turning over, i assume that was caused by the ignition/starter relay being stuck. Either way this was no break the car still didn't start.


BATTERY IS WEAK!

What the car has:
- 1989 240sx
- greddy intake plenum
- megan tubular
- gt28rs turbo
- 3 inch from turbo back
- greddy big fmic piping (piping hacked together)
- greddy type s blow off valve
-
I began my diagnosis and began hunting down the problem and this is what i have done/checked off:
- 12volts on all plugs
- have spark
- have fuel pressure in spec
- hear injectors clicking, but injectors not spraying

The stuff what is not connected ect:

- rad is not on
- vacuum lines not fully connected
- maf not connected
- aicv and knock sensor not connected
- wastegate/bov disconected

Questions i have:
- what exactly is the orange wire and what does it do and tell the car to do and what voltage is sent to the ecu from this wire?
- ignition relays what are they for what do they control
- can injectors fire with a weak battery?
- can injectors click but not shoot fuel?
- how come even with a fully charged integra battery the car still doesn't turn over at full speed? its very sluggish?
- how come when i crank the car the ecu light doesnt come completely off it starts to flicker?


Im begging for help i was in an accident and i need a car the car i was in was a write off and i want to take the money and fix this one.

[Djinfinit]

common guys no one knows?

[Djinfinit]

any one?

[PyR0NiAk]

- how come when i crank the car the ecu light doesnt come completely off it starts to flicker?

I just skimmed your post, but that makes it sound like your ECU is set to show codes. There's a screw on your ecu to change this.

[Djinfinit]

no not like blink.. it flickers..:S

[PyR0NiAk]

Well, if that's flickering, and your starter is turning slow, it's time to double check all of your connections. Something is loose, or your battery is crap.

[Djinfinit]

Well, heres the deal.

I had a another harness in there and stupid me had taken of all the factory tape from the harness near the ecu plug. What i mean by tape is the tape over crimps ect. Well by doing that i guess the chassis grounded out or something and burnt my fuel injector drivers on the ecu(the diode on the ecu blew). So i decided lets go with a fresh harness, so i purchased a harness from a local member and he assured me it was pre-wired and worked perfectly well that was a lie and i had to re do some stuff. I put a j30 ignitor and the dash connector from my old harness on this one, and finally had to replace a broken ecu connector. Yes, stupid me again. Now prior to removing the old harness the car would turn over fast and everything with a battery i was using, but when i installed the new harness the car wouldn't turn over(crank) at all. Considering i tend to say i have fairly decent knowledge of the 240sx (owned 4) i was stumped at why it wouldn't start, or even crank for that matter. I was expecting a turn key start. So, i once again started searching and searching, and eventually began giving up on this car. I decided if the starter was fine all along it had to do with some sticking relay or something. So i kicked my dash and there it went the car started turning over. Now don't get excited, it turned over slowly not like a fully charged battery that i took out of my integra that was in an accident. I was like wtf? and on top of that the jumper wires became very hot quickly:s. So here i am alone with no car and its getting closer and closer to summer and my poor little car isnt running. So, i dont no if the ecu flickering is because of a weak connection on some wires, the starter relay not clicking over completely or battery. Theres also a squeal almost like a grind when i crank so i dont no if something is grinding :S? it wasnt a problem with the other harness

If anyone can read that and see if it helps that would be awesome.



pyroniak im really looking forward to your answer, no one elses seems to want to help:(

[Djinfinit]

I just recently removed the whole harness, and checked continuities from plugs to ecu connector, seems like injectors are good. What else should i check out? Also it seems as thought the harness was broken before as well because looks like he soldered a whole bunch of wires at the ecu?:S

[Lobo240sx]

Check your grounds. Did you relocate the battery in the back??

[Djinfinit]

no..

[PyR0NiAk]

I still think you have a connection issue. Like I said before. If any lights are flickering, something is loose.

[Djinfinit]

noo i think i found out i think the flickering was because of a week battery but the slow starter and hot wires is because there is a squealing noise coming from the engine when i turn it by hand.. And i took out the plugs and its getting louder? Maybe theres no oil on cylinder walls because the engine has been sitting so long?

[Djinfinit]

scratch that i dont know whats squealing but whatever it is, is coming from behind the engine. I think this extra load is causing the starter motor to run hot ect, and drain the battery.

[PyR0NiAk]

Squealing would be a bad starter. The ISIS OE replacement is pretty cheap through EnjukuRacing.com

[Djinfinit]

nevermind the noise was the valves or head. It didnt have lots of oil so i just poured some in. Would this add much more load on the starter?

[PyR0NiAk]

Well, yeah. Dude, I'm not trying to be a d!ck, but how much experience do you have working on cars?

[Djinfinit]

i have alot of experience, but man this has been way overwhelming jumping from one problem to the other.

[PyR0NiAk]

The fact that you asked if a lack of oil would make the motor harder to turn over..... This is why I asked you how much experience you have.

[Djinfinit]

it has oil i said the valve train didnt have oil -_-

[Djinfinit]

so major twist in the story.

So i took the harness out extended the injector wires because of the greddy intake plenum gave it a nice clean look. And then decided to remove the cas and spin it with the key on the on position. When i spun it the injectors didnt seem to shoot fuel but spit? :S i think where getting really close. Im gonna try fixing the ecu connector tonight, and get back to you guys. Hopefully this is the problem. Also the noise i was hearing when i was starting the car wasnt the injectors firing so its not some crazy problem.

Mean-while if you guys have any suggestions please let me know everything is helpful.

[Djinfinit]

So i got my sr20det running and i just felt a ton of air shooting out of the BOV. So i decided to close it with the adjustment screw(greddy type-s) as i tighten its ok but once its almost shut and no air is coming out of the bov the car dies:S? but with the bov open and shooting air out of it at idle it runs fine. And yes if the bov is shooting air at idle and i give it throttle it closes. BTW i cant drive it yet still have driveshaft ect to hookup.

[USMCgetsome]

check your vacuum line going to the bov. Take some pics of your progress of the wiring on the sr20det. Also you may want to reset your ecu. It probably had some codes on it.

[Djinfinit]

its reseted. and i think it has to do with the ebay fpr i think its making the car run way to rich.

[Djinfinit]

One of my buddies came over i started it with the bov open(wont start with it closed). He was standing there and i started the car and he came out of the garage saying that the car is running rich. I asked him how bad he said it seemed pretty bad. BTW i dont have exhaust hooked up, so it was right out of the dump pipe.

I really think it has to do with the fuel system, because i couldnt figure out what was wrong with the other sr that was in there. And this engine was running with a gt30 and apexi power fc. I knew the guy that i bought the motor from and heard it ran it was running really well. So im having similar problems now leads me to believe this little ****** is the culprit.

So, im just gonna toss on a ka24de one there all the same anyway.

[Djinfinit]

I forgot to say the guy installed a 300zx tt fp and ebay fpr i think the ebay fpr is running to much fuel.