all of a sudden running lean!
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Joined: Sep 2003
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all of a sudden running lean!
my car was running fine until i installed a new clutch (car has been sitting for 2 weeks) started it up runs fine for 10 minz then all of a sudden i see my air/fuel gauge drop down to lean when i floor it.. i also feel a differnce my car is much slower then before.. ive replaced the fuel filter and o2 sensors.. i have rc 320 injectors, aem fuel rail, b&m fp/gauge and vafc.. ive tried riching it up with my vafc and fuel pressure and still no luck.. has this happened to anybody?? damn and i was just about ready to dyno my car at secret service =o( (its been tuned with a vafc now i want hondata) really need some help trouble shooting this problem.. thanks!!
! Ne shab'rud'ni !
Joined: Jun 2002
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i feel your pain. though i don't know why a clutch would change anything, but i am still learning.
my b16a swap is stuttering in a closed loop. we've tried everything from fuel delivery to distributer to ecu to wires to water temp sensor to o2 sensors to dayum near everything. my mechanic is frustrated from hell. they are calling place racing again today to go over everything once again.
i know a guy in Orlando with a B16a with the same problem, he just gave up after trying everything as well.
if i hear of anything i'll let you know.
my b16a swap is stuttering in a closed loop. we've tried everything from fuel delivery to distributer to ecu to wires to water temp sensor to o2 sensors to dayum near everything. my mechanic is frustrated from hell. they are calling place racing again today to go over everything once again.
i know a guy in Orlando with a B16a with the same problem, he just gave up after trying everything as well.
if i hear of anything i'll let you know.
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if you can only race me in a straight line then whats the point 
...91 SMF SCCA
...91 SMF SCCAhttp://www.flickr.com/photos/8341770@N07/5601083432/http://www.flickr.com/photos/8341770@N07/5601083432/ by http://www.flickr.com/people/8341770@N07/, on Flickr
I see people out there spending money on the car to improve it … If you spend half that effort just working on your driving skills, making you and the car work together as a team, then you’ll go faster – period. To make the car go a second faster on the track takes a lot more energy and money than making yourself drive it one second faster.
– the late Tom Thrash SCCA Solo E Production
WHAT!?! OK!......
Joined: Jul 2002
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It can also be a dying fuel pump...Fuel pumps don't just stop working, they reduce their flow slowly until they don't flow anymore...
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I work too damn Hard...
04 Civic Si
01 Lexus GS300
I work too damn Hard...
04 Civic Si
01 Lexus GS300
Thread Starter
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well i just replaced my stock fuel pump with a walbro 255lph hp fuel pump and the problem still persist.. damn i guess nobody found out how to fix this problem?? i suspect its an electrical problem but i dunno what =o(
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chitownbrat- i'll most likley find the problem before your buddy does, i'm determine to find this problem.. i'll try replacing mapsensors from my yr car from a junkyard if that doesnt work i'll have to try a new ecu
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chitownbrat- i'll most likley find the problem before your buddy does, i'm determine to find this problem.. i'll try replacing mapsensors from my yr car from a junkyard if that doesnt work i'll have to try a new ecu
! Ne shab'rud'ni !
Joined: Jun 2002
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[i]chitownbrat- i'll most likley find the problem before your buddy does, i'm determine to find this problem.. i'll try replacing mapsensors from my yr car from a junkyard if that doesnt work i'll have to try a new ecu [/B]
hope you can figure yours out soon as well. it was the fuel pump and wires.
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if you can only race me in a straight line then whats the point ...91 SMF SCCA
...91 SMF SCCAhttp://www.flickr.com/photos/8341770@N07/5601083432/http://www.flickr.com/photos/8341770@N07/5601083432/ by http://www.flickr.com/people/8341770@N07/, on Flickr
I see people out there spending money on the car to improve it … If you spend half that effort just working on your driving skills, making you and the car work together as a team, then you’ll go faster – period. To make the car go a second faster on the track takes a lot more energy and money than making yourself drive it one second faster.
– the late Tom Thrash SCCA Solo E Production
! Ne shab'rud'ni !
Joined: Jun 2002
Posts: 11,030
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Originally posted by 91integrals/vtec
damn i wish i found my problem =o( do you have a fuel pressure regulator and gauge??
damn i wish i found my problem =o( do you have a fuel pressure regulator and gauge??
hmmm...they also checked my fuel lines, injectors and fuel rail for blockages.
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if you can only race me in a straight line then whats the point ...91 SMF SCCA
...91 SMF SCCAhttp://www.flickr.com/photos/8341770@N07/5601083432/http://www.flickr.com/photos/8341770@N07/5601083432/ by http://www.flickr.com/people/8341770@N07/, on Flickr
I see people out there spending money on the car to improve it … If you spend half that effort just working on your driving skills, making you and the car work together as a team, then you’ll go faster – period. To make the car go a second faster on the track takes a lot more energy and money than making yourself drive it one second faster.
– the late Tom Thrash SCCA Solo E Production
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well i narrowed down the problem.. fuel pressure is now at 55psi but only 2 cylinders is getting good mixture ( dark tan deposits).. the other 2 is lean ( really white tips).. i suspect dirty injectors. will update after its clean.. still dont understand how brand new injectors get dirty after 10 months of use =o(
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ls/vtec
203whp 139torque
14.0@100mph
street tires, full interior
slicks coming soon
ls/vtec
203whp 139torque
14.0@100mph
street tires, full interior
slicks coming soon
