yay! another problem

sil180sx · 07-30-2005, 10:33 AM

just looking for ideas of what would cause an sr20det to run really rich? car is boggin because of too much fuel runs like crap from idle to around 4000rpms and then runs fine under boost.swapped eng coolant temp sensor, MAF, TPS, O2, engine harness, injectors, coil packs, ecu, checked grounds ... car was running fine earlier today. went to the body shop 1 hour later the car runs like @$$. so looking for ideas anyone have and educated one? got some other ideas and extra parts so im gonna start swapping again tomorrow, but just wanted to get some more input.

sil180sx · 08-02-2005, 01:14 PM

dam no ones got something to say?

Jaggorri · 08-03-2005, 09:39 AM

When were all of these parts changed and did the problem occur after said changes?

Pennyman · 08-04-2005, 03:59 PM

I don't know much, but I would start with the mass airflow sensor, that made my car fail smog here in CA because it was runnning too rich. Just a suggestion.

sil180sx · 08-05-2005, 12:40 AM

Quote:

Originally Posted by Pennyman

I don't know much, but I would start with the mass airflow sensor, that made my car fail smog here in CA because it was runnning too rich. Just a suggestion.

yea but i swapped it with a known good one... plus you would know if your MAF was bad because you wouldnt be able to rev above 2500rpms

sil180sx · 08-05-2005, 12:42 AM

Quote:

Originally Posted by Jaggorri

When were all of these parts changed and did the problem occur after said changes?

i swapped all these parts to see if the problem would change or go away. nothing changed. i finally got my hands on the fender harness that goes into the relay boxes. im pretty sure that its not gonna fix it but the shop that tuned it said that i should change it before i give up and take it to them... mainly cuz theres nothing left to change

CRASHDRIVE · 08-05-2005, 06:54 AM

Every considered checking the Timing?

sil180sx · 08-05-2005, 01:08 PM

Quote:

Originally Posted by CRASHDRIVE

Every considered checking the Timing?

havent checked it but im guessin cuz the ecu is in limp mode its gonna be off. plus as rich as its running i dont think i can adjust it enough to make it run right. im burned a half tank driving like 10 miles or so

dae · 08-05-2005, 02:32 PM

fuel pump?

sil180sx · 08-06-2005, 06:43 AM

Quote:

Originally Posted by dae

fuel pump?

\

dont think a bad fuel pump would cause a car to run rich... it would make it lean out but if the regulator was set wrong or going bad it could cause that... but yea thats also been swapped out... plus if it was bad you would have fuel in the vacuum line. there wasnt any but i swapped it out cuz i had a extra one laying around

NHDrifter · 08-06-2005, 03:22 PM

do you have an Apex AF-C? that would probably fix your problem if you dont...

kmaib0i · 08-16-2005, 09:17 PM

well i took my 240sx sr20 to the dyno and it ran rich so the specialist told me and the reason why is becuase i needed a upgraded fuel pump and upgraded fuel injectors.

But with those two things you might as well get a fuel pressure regulator and a fuel rail to handle the bigger fuel injectors.

I myself am goin to be running a 255lb fuel pump, jdm fpr, 550cc fuel injectors, and hks fuel rail and of course you need a SAFC, and have the professional tune you engine. hopefully that you get you going.

07-30-2005, 10:33 AM	#1
sil180sx Registered User Join Date: Dec 2003 Location: okinawa,japan Posts: 152	yay! another problem just looking for ideas of what would cause an sr20det to run really rich? car is boggin because of too much fuel runs like crap from idle to around 4000rpms and then runs fine under boost.swapped eng coolant temp sensor, MAF, TPS, O2, engine harness, injectors, coil packs, ecu, checked grounds ... car was running fine earlier today. went to the body shop 1 hour later the car runs like @$$. so looking for ideas anyone have and educated one? got some other ideas and extra parts so im gonna start swapping again tomorrow, but just wanted to get some more input.

08-16-2005, 09:17 PM	#12
kmaib0i Registered User Join Date: Aug 2005 Posts: 1	i might have the answer to all your problems well i took my 240sx sr20 to the dyno and it ran rich so the specialist told me and the reason why is becuase i needed a upgraded fuel pump and upgraded fuel injectors. But with those two things you might as well get a fuel pressure regulator and a fuel rail to handle the bigger fuel injectors. I myself am goin to be running a 255lb fuel pump, jdm fpr, 550cc fuel injectors, and hks fuel rail and of course you need a SAFC, and have the professional tune you engine. hopefully that you get you going.

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08-02-2005, 01:14 PM	#2
sil180sx Registered User Join Date: Dec 2003 Location: okinawa,japan Posts: 152	dam no ones got something to say?

08-03-2005, 09:39 AM	#3
Jaggorri Registered User Join Date: Jun 2004 Posts: 90	When were all of these parts changed and did the problem occur after said changes?

08-04-2005, 03:59 PM	#4
Pennyman A ring a ding ding... Join Date: Dec 2003 Location: Santa Cruz, CA Posts: 380	I don't know much, but I would start with the mass airflow sensor, that made my car fail smog here in CA because it was runnning too rich. Just a suggestion.

08-05-2005, 06:54 AM	#7
CRASHDRIVE Registered User Join Date: Nov 2003 Location: San Diego Posts: 937	Every considered checking the Timing?

08-05-2005, 02:32 PM	#9
dae boro hachiroku driver Join Date: Mar 2004 Location: on top of a hill in the east bay Posts: 340	fuel pump?

08-06-2005, 03:22 PM	#11
NHDrifter Registered User Join Date: Aug 2004 Location: Nashua, NH Posts: 467	do you have an Apex AF-C? that would probably fix your problem if you dont...