SR20DET DUMPING FUEL

For the RWD SR20DET cars! Sponsored by Wiring Specialties.
S-ICHISAN
Posts: 22
Joined: Mon May 24, 2010 5:22 pm
Car: 89 240SX COUPE W SR20DET...
Location: florida

Post

ok i have an sr20det in an 89 coupe
fmic.w bov..walboro..manual boost controller..
ive searched....
all of a sudden my engine starts dumpin fuel...
ive checked coilpacks
12v check
checked each one with sparkplug they all work
checked coilpack resistance against fsm..there good...
fuel pump power..good...
i have consult...no codes...
consult is just reading rich...
it seems like the injector orings r leaking..
i checked injector o-ring wit the rail off pump on..
no leaks...
is it possible for the ecu to be messed up but the engine still runs...and doesnt throw codes?
im just checking b4 i buy a new ecu....
i need help if anyone has any ideas :wtf2:


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vocationalzero
Posts: 870
Joined: Thu Jan 24, 2008 9:44 pm
Car: 92 Too For Dee
87 BMW 635 CSi
06 Dodge Dakota Night Runner Edition
06 Nissan Sentra S
Location: Pfllugerville, Tx

Post

stock maf or no?

S-ICHISAN
Posts: 22
Joined: Mon May 24, 2010 5:22 pm
Car: 89 240SX COUPE W SR20DET...
Location: florida

Post

stock maf..
isis fpr..

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PyR0NiAk
Posts: 3851
Joined: Sun Mar 01, 2009 4:29 pm
Car: S13 SR W/ T2 GT3071R .86AR, JWT S4 Cams, 810cc Injectors,Z32 MAF, JWT tuned ECU 87mm 9:1 Compression CP pistons, Manley Rods
Location: Ohio
Contact:

Post

What does your fuel pressure read at idle?

S-ICHISAN
Posts: 22
Joined: Mon May 24, 2010 5:22 pm
Car: 89 240SX COUPE W SR20DET...
Location: florida

Post

41psi....
i just checked the resistance on the injectors..and there good....
started car still runs just bad idle and dumps fuel...with no codes..at all

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USMCgetsome
Posts: 2030
Joined: Wed Apr 14, 2004 7:38 pm
Car: OWN S13.5 RB25DET/2003 G35
Contact:

Post

check your fuel injector orings

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PyR0NiAk
Posts: 3851
Joined: Sun Mar 01, 2009 4:29 pm
Car: S13 SR W/ T2 GT3071R .86AR, JWT S4 Cams, 810cc Injectors,Z32 MAF, JWT tuned ECU 87mm 9:1 Compression CP pistons, Manley Rods
Location: Ohio
Contact:

Post

S-ICHISAN wrote:41psi....
i just checked the resistance on the injectors..and there good....
started car still runs just bad idle and dumps fuel...with no codes..at all
41psi with vacuum hooked up? If so, that's high.

S-ICHISAN
Posts: 22
Joined: Mon May 24, 2010 5:22 pm
Car: 89 240SX COUPE W SR20DET...
Location: florida

Post

its been running that for a while at 41psi... :poke:

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PyR0NiAk
Posts: 3851
Joined: Sun Mar 01, 2009 4:29 pm
Car: S13 SR W/ T2 GT3071R .86AR, JWT S4 Cams, 810cc Injectors,Z32 MAF, JWT tuned ECU 87mm 9:1 Compression CP pistons, Manley Rods
Location: Ohio
Contact:

Post

Well, that could definitely cause a mildly rich condition. Could result in a bad O2 sensor. Bad O2 sensor will result in an even more rich condition because it can no longer read accurately.

S-ICHISAN
Posts: 22
Joined: Mon May 24, 2010 5:22 pm
Car: 89 240SX COUPE W SR20DET...
Location: florida

Post

i got it..
when the wheel rubbed the harness..it only rubbed the wiper motor and brake booster wire..
but sumhow it kill the switched power to the iacv...
with a small boost leak created a big mess
i fixed the iacv power and tighted boost piping and it worked perfectly
but i kno now to never connect iacv blk/yell...to the same color...just to switched power..so nuthing happens to the idle...

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PyR0NiAk
Posts: 3851
Joined: Sun Mar 01, 2009 4:29 pm
Car: S13 SR W/ T2 GT3071R .86AR, JWT S4 Cams, 810cc Injectors,Z32 MAF, JWT tuned ECU 87mm 9:1 Compression CP pistons, Manley Rods
Location: Ohio
Contact:

Post

You never mentioned your wheel rubbed the harness... We're not psychics.

S-ICHISAN
Posts: 22
Joined: Mon May 24, 2010 5:22 pm
Car: 89 240SX COUPE W SR20DET...
Location: florida

Post

i didnt mention it cause the wires that rubbed had nuthing to do with the engine..uh which i thought....
but im posting on this to help others....

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PyR0NiAk
Posts: 3851
Joined: Sun Mar 01, 2009 4:29 pm
Car: S13 SR W/ T2 GT3071R .86AR, JWT S4 Cams, 810cc Injectors,Z32 MAF, JWT tuned ECU 87mm 9:1 Compression CP pistons, Manley Rods
Location: Ohio
Contact:

Post

:bigthumb:


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