wtk sr20 engine problem

vans · Postby **vans** » March 19th, 2009, 5:22 pm

i have a black top vvl neo 2.0l engine but when i press gas to take off the car actually feels like it losing power or slowing down. if i am just touch the gas the car builds up speed naturally but i cannot mash hard. it even slows down on a hill or incline what could be the problem? please help

Anil_Sooknanan · Postby **Anil_Sooknanan** » March 19th, 2009, 5:29 pm

suffering for fuel

vans · Postby **vans** » March 19th, 2009, 10:57 pm

will give my mechanic that tip

GEAR_HEAD · Postby **GEAR_HEAD** » March 20th, 2009, 7:18 am

Anil_Sooknanan wrote:suffering for fuel

could be fuel pump or injectors right?

THE SYNDICATE · Postby **THE SYNDICATE** » March 20th, 2009, 7:23 am

what fuel pump u running?

vans · Postby **vans** » March 20th, 2009, 10:06 am

not sure got the 2 days now so i have no idea

Anil_Sooknanan · Postby **Anil_Sooknanan** » March 20th, 2009, 6:16 pm

a stock pump will be able to fun the engine just fine. check pump, injector, filter, regulator

vans · Postby **vans** » March 20th, 2009, 8:52 pm

filter was really really dirty liquid came ouyt brown. we think the prob is the pump now the pressure in it is dropping so i goin an change and clean injec tors tonorrow

Anil_Sooknanan · Postby **Anil_Sooknanan** » March 20th, 2009, 11:21 pm

if you want the injectors cleaned properly you could give me a call

janfar · Postby **janfar** » March 21st, 2009, 8:44 am

If the car was down for a whilethe tank prolly rust up inside causing the pump to get dirty. Recommend you take down the tank and clean it out if it is...

Anil_Sooknanan · Postby **Anil_Sooknanan** » March 21st, 2009, 10:33 am

^^^ very good point

V2NR 3.0 · Postby **V2NR 3.0** » March 21st, 2009, 10:53 am

Anil_Sooknanan wrote:a stock pump will be able to fun the engine just fine. check pump, injector, filter, regulator

You mean a stock pump as in a stock SR20 fuel pump right?. A walbro will suit this application just fine

vans · Postby **vans** » March 22nd, 2009, 2:26 pm

Postby **flatline** » March 22nd, 2009, 10:22 pm

sure it's not the transmission? If u put it into manual mode, you would see it stuck in 3, and would not change even with your input. Also, if you restart, the CVT light may not come on, or keep flashing.

vans · Postby **vans** » March 23rd, 2009, 11:36 am

flatline please explain. manual mode? STUCK IN 3? cvt light ? i ain't no what the hell you talking about

Postby **flatline** » March 23rd, 2009, 1:15 pm

If you do a search of the Nissan forum for "CVT" you may see similar threads describing loss of power. The part where you say it loses power on an incline, might indicate the transmission is not "gearing" properly. Basically, the CVT Transmission that the SR20VE engine comes mated to, consists of a belt and pulley system for the Continuously Variable Transmission, which is a bit different from regular automatic. If you engage the sport mode, by pulling the gear selector to the +- symbol, under normal acceleration, you would see the numbers between your speed and rpm gauges, increasing. If the tranmission is the problem, it would remain in gear 3, or still display as D, even if in "manual" sport mode. When you start the car, and the transmission is functioning normally, a light saying CVT comes on for about 5 seconds, above the numbers, else it will not light or it would blink several times if there is a problem.

Common issues might be the Stepper Motor, or one of the 2 Speed Sensors need to be replaced, provided it's the transmission giving the problems...depends on how bad the power loss you are trying to describe is.

Check out these threads with diagnostic procedures for the transmission:
http://forums.trinituner.com/forums/vie ... hlight=cvt
http://forums.trinituner.com/forums/vie ... hlight=cvt
http://forums.trinituner.com/forums/vie ... hlight=cvt

Also, if you need to download the service manual for this transmission:
http://www.nissanprimera.net/forum/foru ... =1319&PN=2

vans · Postby **vans** » March 23rd, 2009, 8:45 pm

ok thanks for the advice . will keep it in mind but my mechanic hooked up a gauge to the engine and the pressure in the fuel line is dropping while driving. but this only happens when the car is driven after a while, maybe when the pump gets hot he said that normal pressure was around 38. even more when driving, but when driving and about to change gears or something the pressure dropping to like 20 so which led us to believe its the fuel pump

vans · Postby **vans** » March 23rd, 2009, 8:47 pm

ok thanks for the advice . will keep it in mind but my mechanic hooked up a gauge to the engine and the pressure in the fuel line is dropping while driving. but this only happens when the car is driven after a while, maybe when the pump gets hot he said that normal pressure was around 38. even more when driving, but when driving and about to change gears or something the pressure dropping to like 20 so which led us to believe its the fuel pump

vans · Postby **vans** » March 27th, 2009, 7:39 am

problem resolved changed fuel tank and fuel pump thanks everyone

THE SYNDICATE · Postby **THE SYNDICATE** » March 27th, 2009, 8:17 am

^^^good to hear u got through bro......... :fadein:

JesuEric · Postby **JesuEric** » September 30th, 2014, 10:02 pm

needed this...have this problem atm ....have the fuel pump from the QG18 set up before tho....I use premium and fuel injector cleaner every 3 weeks so I don't think injectors are an issue but I did not service them since I got the engine thought nit wasn't needed as I did that.....fuel pump changed 2 weeks ago and I praying is not my tranii

JesuEric · Postby **JesuEric** » September 30th, 2014, 10:14 pm

idk if its fuel cus wen i mash its exactly how he describe but wen in neutral if I rev it sounds normal...

JesuEric · Postby **JesuEric** » October 1st, 2014, 3:47 pm

................

JesuEric · Postby **JesuEric** » October 1st, 2014, 9:04 pm

i have the distributor a good bit advanced on premium ...still doin the same thing..

JesuEric · Postby **JesuEric** » October 4th, 2014, 11:30 am

serviced the injectors and the car feels better but still not 100%.....

mikeddougla · Postby **mikeddougla** » August 24th, 2015, 12:04 pm

I've got a problem installed a Neo vvl sr20 into a B13 it has a normal sr20 tranny, after moving passed 140kph the car stalled, I have to pull to the side of the road then re-start, I changed the fuel pump,spk piugs oil , all filters, decarb head , used a dianostic tool on Sunday 23rd August 2015 , trottle body position sensor ,this was done, NOW the car idling at 1700rpm in park ,put into a gear 1000rpm , put a/c on it drops to 500rpm. Need HELP!! any suggestions???????

Mosaic · Postby **Mosaic** » September 14th, 2015, 1:08 pm

Cut off at speed? - Could be crank/cam sensor intermittent or failing. Swap those out as intermittents like that may not scan as a fault.

THE SYNDICATE · Postby **THE SYNDICATE** » September 30th, 2015, 6:37 pm

mikeddougla wrote:I've got a problem installed a Neo vvl sr20 into a B13 it has a normal sr20 tranny, after moving passed 140kph the car stalled, I have to pull to the side of the road then re-start, I changed the fuel pump,spk piugs oil , all filters, decarb head , used a dianostic tool on Sunday 23rd August 2015 , trottle body position sensor ,this was done, NOW the car idling at 1700rpm in park ,put into a gear 1000rpm , put a/c on it drops to 500rpm. Need HELP!! any suggestions???????

500 Ac is low. The step up my not be connected or iacv not working. Check that out.

What fuel pump u using ? Fuel delivery may still be insufficient hence speed cut at 140. Factory speed cut is 180km, so either way u still gonna have a limit on speed.