3GENJDM: Need some help, car wont start

[6xxx]

okay so my car worked fine until one day, my car was acting weird turning off randomly, battery dying and what not.

So i bought an alternator an installed it, but didn't disconnect the - terminal so i shorted something out.

after finishing the install with the - terminal disconnected i tried to start the car and it wouldn't start. my brake lines were getting hot and smoking (SS lines) so i figured one of my grounds was bad. After checking, the big important ground on the trans came loose.

So i cleaned and bolted it down again, now there is no more smoke or anything it just doesn't turn on.

I have spark at the coil and at the spark plugs

I also have fuel pressure at the rail.

car cranks acts like it wants to turn over but doesn't get there. Any ideas?
my mods

Gen3
pcf datalogit
ku manifold
sc44 turbo

i know the ECU is not fried since my datalogit powers up an i can read all ecu parameters. I checked all Fuses front back and inside and nothing.

Any ideas? any help would be appreciated thanks

[Mark_Dorman]

Have you checked all your fuses and fusible links?

Does the engine actually crank and just not start?

[6xxx]

Yes i checked all fuses with my multimeter.

Everything on the car works fine, car cranks it just doesnt start.

[Mark_Dorman]

Have you checked your ignition/starter switch? It's located on the back of the ignition key column. Check if you have cont. between pins 9 and 10 when the key is in the on position.

[6xxx]

ill deff check that today. so this is behind the key cylinder??

what does this control exactly?

[Mark_Dorman]

It controls the routing of the power to the ignition and starter...use the BGB to trouble shoot it.

[mmaxrossixx]

i had this problem with my 240sx try disconnecting the maf or map sensor then crank it over if it starts then keep the car on and plug it back in. give this a shot it might work.

[6xxx]

ill look on my bgb mark.

[6xxx]

Originally Posted by mmaxrossixx

i had this problem with my 240sx try disconnecting the maf or map sensor then crank it over if it starts then keep the car on and plug it back in. give this a shot it might work.

i tried this real quick it starts and dies quickly. with the map sensor unplugged

after plugging it in and trying to start it, it starts if i give it some gas but only idles at 500 600rpms and will only stay on with the gas pedal to the floor at 500-600rpm.

After looking at the engine i am leaking gas out of the return line to the gas tank, i guess this should be issue or part of it.

[Mark_Dorman]

Have you checked your TPS and ISC?

[6xxx]

I have a nissan q45 tb an i eliminated the isc and it worked well be4

[Mark_Dorman]

So does that mean you checked the TPS?