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View Full Version : SR bogs down after 3k rpms. PLZ help!!!


ZacksS13SR
04-23-2011, 07:12 PM
Ok so I recently got my SR rebuilt and havent been able to figure this problem out. When I start my car in the morning it runs great until it gets to normal operating temperature then the motor begins to cut out when i go into boost and the rpms steadily drop until im barely able to do 5mph. I have replaced the MAF checked my timing countless times and nothing has helped im a newb wiuth SRs and im at a loss as of what to do any help would be greatly appreciated. Also the car will go into full boost in neutral. Will get a video up soon. Alos one of the wires from the speed sensor is broke in two not sure if that could cause the problem but figured id add that.

s14bigpun
04-23-2011, 08:52 PM
yea its funny because my car bogs when I hit boost also. What kind of spark plugs are you running? when you rebuilt your motor did you change your fuel pump? maybe its not pumping enough fuel to the motor. For some reason whenever I changed my spark plugs to G power my car started bogging whenever boost came. I dk if i helped but letme know Ill try to do some research and find out whats goin on for you

ZacksS13SR
04-23-2011, 09:09 PM
Im running NGK bkr7e spark plugs and i have a walbro fuel pump

JDMtyteYO!
04-24-2011, 08:45 AM
try gapping plugs (.028), make sure TPS is spot on and recheck timing with a gun

cotbu
04-24-2011, 10:09 AM
timing f'ed for 1 or you have a launch control anti lag setup. You should not be seeing full boost in neutral. I guess your boost gauge could be fubar. I suxs never mind.

ZacksS13SR
04-24-2011, 10:13 AM
try gapping plugs (.028), make sure TPS is spot on and recheck timing with a gun

ok ill try gapping the plugs and i honestly have no clue how to mess with the TPS and i have checked timing several times with a gun. shows to be right at 15 BTDC

JDMtyteYO!
04-24-2011, 10:35 AM
also check for vacuum leaks

TPS Throttle Position Sensor (SR20) - Hardtuned.net (http://www.nissansilvia.com/forums/index.php?showtopic=223078)

usmcgetsome
04-24-2011, 01:44 PM
To be honest fellas it really sounds like a dying maf. those are the exact symptoms when the maf dies out. When u get it up to temp it just wants to kill the motor no matter what you speed is or what you tps is set at. Check the voltages of the maf

ZacksS13SR
04-24-2011, 03:15 PM
To be honest fellas it really sounds like a dying maf. those are the exact symptoms when the maf dies out. When u get it up to temp it just wants to kill the motor no matter what you speed is or what you tps is set at. Check the voltages of the maf

I put a new MAF on a few days ago with no change in how it ran.

ZacksS13SR
04-24-2011, 04:45 PM
video of me driving car. quality of video is crap

YouTube - Sr20det running problem 2 (http://www.youtube.com/watch?v=Fy0eb7bHs4M)


http://www.youtube.com/watch?v=TAoTlrTC7ew

usmcgetsome
04-24-2011, 09:14 PM
Was the fuel pressure regulator gauge pulsing? wtf! I think something is definitely is wrong with your fuel pressure regulator. it was supposed to slowly climb up and then back down to 38-43 psi. Double check those numbers.

ZacksS13SR
04-26-2011, 01:05 AM
is it possible that my ecu is goin to shit

ZacksS13SR
04-26-2011, 10:08 AM
So nobody has a clue as to what the hell is goin on with my car

ZacksS13SR
04-26-2011, 01:19 PM
Ok so I narrowed it down to either my FPR or fuel pump my fuel pressure drops like a mofo when i rev the motor

usmcgetsome
04-26-2011, 03:06 PM
It's the pump get a new one asap!!!!!!!!!!!!! change the filter as well. Also, just an fyi check the wiring to the fuel pump. If none of this works get a new HARD WIRE fuel pump kit.

http://www.deatschwerks.com/accessories/fuel-pump-hardwire-installation-kit

JDMRIDDAZ
04-26-2011, 05:26 PM
It's the pump get a new one asap!!!!!!!!!!!!! change the filter as well. Also, just an fyi check the wiring to the fuel pump. If none of this works get a new HARD WIRE fuel pump kit.

DeatschWerks.com | Fuel Pump Hardwire Installation Kit | Accessories | DeatschWerks (http://www.deatschwerks.com/accessories/fuel-pump-hardwire-installation-kit)
he should rewire the pump before he buys a new pump
walboros just dont go bad like that
its an s13 most likely its the volts to the pump
my s13 is fully rewired
fuelpump
coilpacks
ecu..
and a alternator jump...
he doesnt have to buy a kit unless he cannot do wireing

ZacksS13SR
04-29-2011, 10:40 AM
Ok so it was the fuel pump. God damn walbro went out after 8 months

Pro ViZIon
04-29-2011, 12:02 PM
Could have had yourself a fake walbro.

ZacksS13SR
04-30-2011, 03:14 PM
Could have had yourself a fake walbro.

I doubt it I bought it from enjuku racing