PDA

View Full Version : built rb25det in s14 first start up need some help


nyc240sx
08-04-2012, 12:38 AM
I was able to start my rb25 240sx today for the first time in 2 years its been a long build. The car would start normally about 5 times or so and died out when i started bleeding the system. what i havent done yet is adjust the tps sensor and move the maf sensor 18inches from the turbo i have it about 7inches away. The issue iam having is the car will crank but not start without hitting on the gas pedal but then when its on it wont stay on. I hear the fuel pumps turning on maybe not enough pressure coming in havent started searching the problems yet. any help greatly appreciated
thanks

nyc240sx
08-07-2012, 01:31 AM
bump anyone

Sileighty_85
08-07-2012, 05:48 AM
Pull codes from ECU, possibly Coolant Temp Sensor

nyc240sx
08-08-2012, 05:34 AM
Ok ill try getting a new one ...before I built the motor had it running excellent

nyc240sx
08-09-2012, 11:30 PM
no luck from coolant sensor..going to check for spark it seems like iam not getting any the spark plugs are black

nyc240sx
08-12-2012, 12:27 PM
found out the timing is off by 2 teeth on the cam gear when i advanced it it started right up..but now i have a feeling my oil pump gone bad its a n1 i hear alot of bad news on it.

nyc240sx
10-08-2012, 04:17 PM
ok i am back again took the motor out to fix the oil pump and timing motor is back in but i turn the key it doesnt crank up..i have power going to the starter but it seems like theres a trigger problem. I am tired of this crap i turn the key numerous times iam not getting any crank i am trying to prime the motor but no response from the starter..The ecu light comes on steady red so it seems like its getting power. I got the harness from carl h couple of years ago now i am thinking about getting a new harness from wiring specialties... I changed relays its still the same..How many grounds should i have on the motor..what i have currently is the block grounded, intake manifold grounded, head ground on exhaust side to firewall. alternator ground, does the starter need a ground wire? or its just the power and the one wire connector
any help appreciated

bkt808
10-08-2012, 06:08 PM
does it start with the maf unplugged? make sure to adjust your tps and make sure its in the right plug, i had mine plugged in to the wrong plug on the tps and wouldnt start.

nyc240sx
10-08-2012, 11:03 PM
the starter doesnt even crank tps is new didnt adjust it yet i am trying to prime the motor since its rebuilt..got a gremlin some where right now i am thinking its the ecu i put the battery cables the opposite way the battery was in the box wrong way i probably fried something in there

nyc240sx
10-09-2012, 07:48 AM
i got a good feeling its the harness i got it from carl h on nico club a while back something might have gone loose some where