built rb25det in s14 first start up need some help - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

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

08-04-2012, 12:38 AM	#1
nyc240sx Zilvia FREAK! Join Date: Jul 2009 Location: new york city bitch Age: 38 Posts: 1,022 Trader Rating: (14) Feedback Score: 14 reviews	built rb25det in s14 first start up need some help 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

08-07-2012, 05:48 AM	#3
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	Pull codes from ECU, possibly Coolant Temp Sensor __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

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08-07-2012, 01:31 AM	#2
nyc240sx Zilvia FREAK! Join Date: Jul 2009 Location: new york city bitch Age: 38 Posts: 1,022 Trader Rating: (14) Feedback Score: 14 reviews	bump anyone

08-08-2012, 05:34 AM	#4
nyc240sx Zilvia FREAK! Join Date: Jul 2009 Location: new york city bitch Age: 38 Posts: 1,022 Trader Rating: (14) Feedback Score: 14 reviews	Ok ill try getting a new one ...before I built the motor had it running excellent

08-09-2012, 11:30 PM	#5
nyc240sx Zilvia FREAK! Join Date: Jul 2009 Location: new york city bitch Age: 38 Posts: 1,022 Trader Rating: (14) Feedback Score: 14 reviews	no luck from coolant sensor..going to check for spark it seems like iam not getting any the spark plugs are black

08-12-2012, 12:27 PM	#6
nyc240sx Zilvia FREAK! Join Date: Jul 2009 Location: new york city bitch Age: 38 Posts: 1,022 Trader Rating: (14) Feedback Score: 14 reviews	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.

10-08-2012, 04:17 PM	#7
nyc240sx Zilvia FREAK! Join Date: Jul 2009 Location: new york city bitch Age: 38 Posts: 1,022 Trader Rating: (14) Feedback Score: 14 reviews	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

10-08-2012, 06:08 PM	#8
bkt808 Zilvia Member Join Date: Feb 2010 Location: Wailuku, Maui, Hawaii Age: 33 Posts: 245 Trader Rating: (1) Feedback Score: 1 reviews	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.

10-08-2012, 11:03 PM	#9
nyc240sx Zilvia FREAK! Join Date: Jul 2009 Location: new york city bitch Age: 38 Posts: 1,022 Trader Rating: (14) Feedback Score: 14 reviews	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

10-09-2012, 07:48 AM	#10
nyc240sx Zilvia FREAK! Join Date: Jul 2009 Location: new york city bitch Age: 38 Posts: 1,022 Trader Rating: (14) Feedback Score: 14 reviews	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