Maf??? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

WhittSr20det · 02-01-2007, 02:08 AM

sr20det blacktop
about 2 weeks ago i noticed my car was starting run more rich than usally, did a little tuning with my afc. Ran Fine this past week its hard to get started floods out pretty much, after i do get it goin it idle's like the dile ari control has gone out, then giving it gas i will have to pedal the gas until it stops falling on its face . Then when driving first gear from a stop is a nightmare it jumps bucks , but will go past 2500rpm. seconded gear it gets a little better, until i get at a general constant crusing speed then giving it gas to accelerate it will jump and buck ... then from there its back to the b/s. then comign to a stop it idles up and down like i said before.. then taking off the same thign as posted .. Runs ungodly rich u can smell it.... So I pulled my plugs , they were black went ahead and changed them . Same deal didnt help.. Fuel filter ... same thing ... im runnin a Walboro 255 fuel pump. Fuel pump is not the problem took another fuel pump i had for the car again a walboro same thing so its not the fuel filter plugs, so i ran codes it threw a 55 ...55 - Other Malfunction. CONSULT Terminal Required. Adjusted idle air , tps, still havent pressure tested for boost leaks cause then boost gauge only fluxuates on idle and still hits the 10 psi i have it set for?? any i deas?????
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ladiesman8527 · 02-01-2007, 07:07 AM

i'd go ahead and check for vacuum leaks and or boost leaks and see what happens.

reactor · 02-01-2007, 11:21 AM

A code 55 means NO MALFUNCTION.

(This is as detected by the ECU, The ECU does not test mechanical failures, only electrical.)

cotbu · 02-01-2007, 05:32 PM

code 55 means no sensor malfunction
you have a boost leak

WhittSr20det · 02-01-2007, 07:40 PM

yeah thats what all mine friends were sayin and i was saying no i dont i just pressure stested it a week ago, so pressure tested it today no leaks.... so then took starting fluid sprayed all over my intake manifold car did change rev any higher... so any more ideas .. turbo?

koukimonster139 · 02-01-2007, 07:54 PM

is that seriously ur sig lol

boost leak or mafs

hondasrboring · 02-02-2007, 12:28 AM

could be injectors. I just had a problem with my one of mine. Had a progressively rough idle so i pulled the plugs and the #1 plug was black so i cleaned the plugs up and switched the #1 and #2 injector to see if the problem follows.

North240 · 02-03-2007, 09:46 AM

It wouldn't hurt to look at the injector o rings, I wouldn't be surprised if they were looking a little rough. If not you only wasted 15 minutes.

bouncin_180 · 02-03-2007, 10:31 AM

maybe you got some messed up wiring for you maf connection ... if ever you start up and your having that problem pop yer hood wiggle yer wire n see if the prob goes away ... i thinking i kinda got the same problem ... my maf wire is like super duper long, my homie said im losing connectivity cause oh it being so long sometimes meaning a drop in voltage to the maf equal improper function ... basically saying your maf dont wanna work sometimes but since its like on n off its not gonna throw a code

kassed33 · 02-03-2007, 10:45 AM

either your MAFS or your SAFC setting. Do you have it set for the correct engine? Do you have a tunned ECU? Pretty much all the correct startup settings for the SR20DET are in the book it comes with.

WhittSr20det · 02-03-2007, 08:22 PM

afc is fine ahvent changed anythign on the engine type... im leaning towards the maf ....

kassed33 · 02-04-2007, 01:26 PM

r u using the SR MAF or a Z32 one, cause the Z32 one has to be set on the SAFC too, just to let cha know incase you didnt already...good luck

kawika219 · 02-04-2007, 09:52 PM

did you ever drop your maf??? i know my car acted like yours after i droped it...so i got another one

WhittSr20det · 02-05-2007, 01:54 AM

actually yes i did drop it a bit ago

kawika219 · 02-05-2007, 02:55 AM

is this the 1st time using the maf after you dropped it??? if so, try plugging in another maf and see if it works better

WhittSr20det · 02-05-2007, 01:54 PM

no its not , its been a while but since then its gotten progressivily worse... so i dunno i got income tax coming 1700 so i was goin to get a z32 maf new turbo and manifold all that good stuff im just tryin to figure out if that is it or it could be something else

WhittSr20det · 02-11-2007, 10:36 PM

full tank of bad gas lol problem solved runs fine now

02-01-2007, 05:32 PM	#4
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	code 55 means no sensor malfunction you have a boost leak __________________ LoverTechnologies "Half Broken Things!"

02-01-2007, 07:40 PM	#5
WhittSr20det Join Date: May 2006 Location: Ashland,Ky Posts: 33 Trader Rating: (0) Feedback Score: 0 reviews	yeah thats what all mine friends were sayin and i was saying no i dont i just pressure stested it a week ago, so pressure tested it today no leaks.... so then took starting fluid sprayed all over my intake manifold car did change rev any higher... so any more ideas .. turbo? __________________ Sr20DetBlacktop ACT stage 2..6 Puck Clutch Front mount Custom Hard Piping GREDDY TYPE R.. No knockoff shit here Super AFC Auto Meter: BoostGuage,Water Temp,Oil Pressure Megan Racing Dump Pipe Megan Racing Down Pipe Megan Racing Full Exhaust Lsd Falken Torque 5 Wheels Front And Rear Suspension: Kyb gr2 Struts Cusco Camber Plats Tein 2 Inch lowering Springs Cusco Front and Rear Strut Bars Blitz TwinSBC Boost Controller

02-01-2007, 07:54 PM	#6
koukimonster139 Zilvia FREAK! Join Date: Jan 2006 Location: Birmingham, AL Age: 38 Posts: 1,379 Trader Rating: (0) Feedback Score: 0 reviews	is that seriously ur sig lol boost leak or mafs __________________ ho ha ho chi chi

02-02-2007, 12:28 AM	#7
hondasrboring Leaky Injector Join Date: Nov 2006 Location: Indiana Posts: 67 Trader Rating: (1) Feedback Score: 1 reviews	could be injectors. I just had a problem with my one of mine. Had a progressively rough idle so i pulled the plugs and the #1 plug was black so i cleaned the plugs up and switched the #1 and #2 injector to see if the problem follows. __________________

02-03-2007, 09:46 AM	#8
North240 Zilvia Junkie Join Date: Mar 2004 Location: Portland, MAINE Age: 42 Posts: 350 Trader Rating: (0) Feedback Score: 0 reviews	It wouldn't hurt to look at the injector o rings, I wouldn't be surprised if they were looking a little rough. If not you only wasted 15 minutes. __________________ ROUND 2

02-01-2007, 02:08 AM	#1
WhittSr20det Join Date: May 2006 Location: Ashland,Ky Posts: 33 Trader Rating: (0) Feedback Score: 0 reviews	Maf??? sr20det blacktop about 2 weeks ago i noticed my car was starting run more rich than usally, did a little tuning with my afc. Ran Fine this past week its hard to get started floods out pretty much, after i do get it goin it idle's like the dile ari control has gone out, then giving it gas i will have to pedal the gas until it stops falling on its face . Then when driving first gear from a stop is a nightmare it jumps bucks , but will go past 2500rpm. seconded gear it gets a little better, until i get at a general constant crusing speed then giving it gas to accelerate it will jump and buck ... then from there its back to the b/s. then comign to a stop it idles up and down like i said before.. then taking off the same thign as posted .. Runs ungodly rich u can smell it.... So I pulled my plugs , they were black went ahead and changed them . Same deal didnt help.. Fuel filter ... same thing ... im runnin a Walboro 255 fuel pump. Fuel pump is not the problem took another fuel pump i had for the car again a walboro same thing so its not the fuel filter plugs, so i ran codes it threw a 55 ...55 - Other Malfunction. CONSULT Terminal Required. Adjusted idle air , tps, still havent pressure tested for boost leaks cause then boost gauge only fluxuates on idle and still hits the 10 psi i have it set for?? any i deas????? __________________ __________________ Sr20DetBlacktop ACT stage 2..6 Puck Clutch Front mount Custom Hard Piping GREDDY TYPE R.. No knockoff shit here Super AFC Auto Meter: BoostGuage,Water Temp,Oil Pressure Megan Racing Dump Pipe Megan Racing Down Pipe Megan Racing Full Exhaust Lsd Falken Torque 5 Wheels Front And Rear Suspension: Kyb gr2 Struts Cusco Camber Plats Tein 2 Inch lowering Springs Cusco Front and Rear Strut Bars Blitz TwinSBC Boost Controller

02-01-2007, 07:07 AM	#2
ladiesman8527 Zilvia Junkie Join Date: Dec 2005 Location: Collierville, TN Age: 38 Posts: 429 Trader Rating: (0) Feedback Score: 0 reviews	i'd go ahead and check for vacuum leaks and or boost leaks and see what happens.

02-01-2007, 11:21 AM	#3
reactor Leaky Injector Join Date: Aug 2005 Location: Washington Posts: 118 Trader Rating: (0) Feedback Score: 0 reviews	A code 55 means NO MALFUNCTION. (This is as detected by the ECU, The ECU does not test mechanical failures, only electrical.)

02-03-2007, 10:31 AM	#9
bouncin_180 Zilvia Junkie Join Date: Oct 2003 Location: San Diego Posts: 356 Trader Rating: (1) Feedback Score: 1 reviews	maybe you got some messed up wiring for you maf connection ... if ever you start up and your having that problem pop yer hood wiggle yer wire n see if the prob goes away ... i thinking i kinda got the same problem ... my maf wire is like super duper long, my homie said im losing connectivity cause oh it being so long sometimes meaning a drop in voltage to the maf equal improper function ... basically saying your maf dont wanna work sometimes but since its like on n off its not gonna throw a code

02-03-2007, 10:45 AM	#10
kassed33 Leaky Injector Join Date: Jun 2005 Location: rhode island Age: 45 Posts: 57 Trader Rating: (0) Feedback Score: 0 reviews	either your MAFS or your SAFC setting. Do you have it set for the correct engine? Do you have a tunned ECU? Pretty much all the correct startup settings for the SR20DET are in the book it comes with. __________________ josh kassed

02-03-2007, 08:22 PM	#11
WhittSr20det Join Date: May 2006 Location: Ashland,Ky Posts: 33 Trader Rating: (0) Feedback Score: 0 reviews	afc is fine ahvent changed anythign on the engine type... im leaning towards the maf .... __________________ Sr20DetBlacktop ACT stage 2..6 Puck Clutch Front mount Custom Hard Piping GREDDY TYPE R.. No knockoff shit here Super AFC Auto Meter: BoostGuage,Water Temp,Oil Pressure Megan Racing Dump Pipe Megan Racing Down Pipe Megan Racing Full Exhaust Lsd Falken Torque 5 Wheels Front And Rear Suspension: Kyb gr2 Struts Cusco Camber Plats Tein 2 Inch lowering Springs Cusco Front and Rear Strut Bars Blitz TwinSBC Boost Controller

02-04-2007, 01:26 PM	#12
kassed33 Leaky Injector Join Date: Jun 2005 Location: rhode island Age: 45 Posts: 57 Trader Rating: (0) Feedback Score: 0 reviews	r u using the SR MAF or a Z32 one, cause the Z32 one has to be set on the SAFC too, just to let cha know incase you didnt already...good luck __________________ josh kassed

02-04-2007, 09:52 PM	#13
kawika219 Zilvia Member Join Date: Dec 2005 Location: Hawaii Posts: 283 Trader Rating: (1) Feedback Score: 1 reviews	did you ever drop your maf??? i know my car acted like yours after i droped it...so i got another one

02-05-2007, 01:54 AM	#14
WhittSr20det Join Date: May 2006 Location: Ashland,Ky Posts: 33 Trader Rating: (0) Feedback Score: 0 reviews	actually yes i did drop it a bit ago __________________ Sr20DetBlacktop ACT stage 2..6 Puck Clutch Front mount Custom Hard Piping GREDDY TYPE R.. No knockoff shit here Super AFC Auto Meter: BoostGuage,Water Temp,Oil Pressure Megan Racing Dump Pipe Megan Racing Down Pipe Megan Racing Full Exhaust Lsd Falken Torque 5 Wheels Front And Rear Suspension: Kyb gr2 Struts Cusco Camber Plats Tein 2 Inch lowering Springs Cusco Front and Rear Strut Bars Blitz TwinSBC Boost Controller

02-05-2007, 02:55 AM	#15
kawika219 Zilvia Member Join Date: Dec 2005 Location: Hawaii Posts: 283 Trader Rating: (1) Feedback Score: 1 reviews	is this the 1st time using the maf after you dropped it??? if so, try plugging in another maf and see if it works better

02-05-2007, 01:54 PM	#16
WhittSr20det Join Date: May 2006 Location: Ashland,Ky Posts: 33 Trader Rating: (0) Feedback Score: 0 reviews	no its not , its been a while but since then its gotten progressivily worse... so i dunno i got income tax coming 1700 so i was goin to get a z32 maf new turbo and manifold all that good stuff im just tryin to figure out if that is it or it could be something else __________________ Sr20DetBlacktop ACT stage 2..6 Puck Clutch Front mount Custom Hard Piping GREDDY TYPE R.. No knockoff shit here Super AFC Auto Meter: BoostGuage,Water Temp,Oil Pressure Megan Racing Dump Pipe Megan Racing Down Pipe Megan Racing Full Exhaust Lsd Falken Torque 5 Wheels Front And Rear Suspension: Kyb gr2 Struts Cusco Camber Plats Tein 2 Inch lowering Springs Cusco Front and Rear Strut Bars Blitz TwinSBC Boost Controller

02-11-2007, 10:36 PM	#17
WhittSr20det Join Date: May 2006 Location: Ashland,Ky Posts: 33 Trader Rating: (0) Feedback Score: 0 reviews	full tank of bad gas lol problem solved runs fine now __________________ Sr20DetBlacktop ACT stage 2..6 Puck Clutch Front mount Custom Hard Piping GREDDY TYPE R.. No knockoff shit here Super AFC Auto Meter: BoostGuage,Water Temp,Oil Pressure Megan Racing Dump Pipe Megan Racing Down Pipe Megan Racing Full Exhaust Lsd Falken Torque 5 Wheels Front And Rear Suspension: Kyb gr2 Struts Cusco Camber Plats Tein 2 Inch lowering Springs Cusco Front and Rear Strut Bars Blitz TwinSBC Boost Controller