b16a1 fluctuating idle 200 rpm . HELP
#1
Honda-Tech Member
Thread Starter
b16a1 fluctuating idle 200 rpm . HELP
my idle fluctuates 200/300 RPM
COLD don't fluctuates
hot engine fluctuates 30 seconds after starts running ( the first 30s when is hot don't fluctuates )
I've done:
-IACV-
clean 2 times, i close the IACV and engine still fluctuates
-FITV-
clean 2 times, i close the FITV and engine still fluctuates
-vacuum system-
the vacuum system was verified with proper gun, and check the tubes, tube are like new
check with proper smoke equipment (smoke will emerge on leaks)
test it with carburettor cleaner
-TPS-
tested 3 - all tuned to 0.45v open , 4.55V closed
-TB-
clean and tested 2
-IAT-
temperature sensor admission was clean
-Bleeding Air In Cooling System-
done several times
-ECU-
tested 2 stock ECUs
-valve lash-
in 0.15mm
ex 0.20mm
-ignition timing-
15 deg.
-engine timing-
its ok ( set properly )
-cams are proper in alignment
-compression check-
cylinder 4 - 11.5
cylinder 3 - 12.5
cylinder 2 - 11.5
cylinder 1 - 12.5
-spark plug wires-
3 sets tested (2 used, 1 new NGK)
-spark plug-
tested 2 sets (NGK BKR6E-11 || 5304 Denso Iridium IK20)
TESTS with STRANGE results
if i unplug the TPS idle stops fluctuates
if i unplug a spak cable (any one) and plug again idle stops fluctuates
what more can i do ?
i decide to change my ecu pw0-x00(obd0) to obd1
so, i made this changes.
-b18c4 exhaust manifold
-p28 ecu (chipped with p30 map)
-td-86u dizzy with obd1 plugs
-4 wires o2 sensor
and now with o2 sensor enable i dont have fluctuating idle
THANKS TO ALL !!! for helping
COLD don't fluctuates
hot engine fluctuates 30 seconds after starts running ( the first 30s when is hot don't fluctuates )
I've done:
-IACV-
clean 2 times, i close the IACV and engine still fluctuates
-FITV-
clean 2 times, i close the FITV and engine still fluctuates
-vacuum system-
the vacuum system was verified with proper gun, and check the tubes, tube are like new
check with proper smoke equipment (smoke will emerge on leaks)
test it with carburettor cleaner
-TPS-
tested 3 - all tuned to 0.45v open , 4.55V closed
-TB-
clean and tested 2
-IAT-
temperature sensor admission was clean
-Bleeding Air In Cooling System-
done several times
-ECU-
tested 2 stock ECUs
-valve lash-
in 0.15mm
ex 0.20mm
-ignition timing-
15 deg.
-engine timing-
its ok ( set properly )
-cams are proper in alignment
-compression check-
cylinder 4 - 11.5
cylinder 3 - 12.5
cylinder 2 - 11.5
cylinder 1 - 12.5
-spark plug wires-
3 sets tested (2 used, 1 new NGK)
-spark plug-
tested 2 sets (NGK BKR6E-11 || 5304 Denso Iridium IK20)
TESTS with STRANGE results
if i unplug the TPS idle stops fluctuates
if i unplug a spak cable (any one) and plug again idle stops fluctuates
what more can i do ?
PROBLEM FIX
(i think my problem was the o2 sendor harness to the ecu)
(i think my problem was the o2 sendor harness to the ecu)
i decide to change my ecu pw0-x00(obd0) to obd1
so, i made this changes.
-b18c4 exhaust manifold
-p28 ecu (chipped with p30 map)
-td-86u dizzy with obd1 plugs
-4 wires o2 sensor
and now with o2 sensor enable i dont have fluctuating idle
THANKS TO ALL !!! for helping
Last edited by gabrielsousa; 08-18-2014 at 04:27 AM.
#2
Honda-Tech Member
Thread Starter
Re: b16a1 fluctuating idle 200 rpm . HELP
did this today, and didn't solve my idle problem
-valve lash
in 0.15mm
ex 0.20mm
-ignition timing
15 deg.
-engine timing
its ok ( set properly )
-cams are proper alignment
-compression check
cylinder 4 - 11.5
cylinder 3 - 12.5
cylinder 2 - 11.5
cylinder 1 - 12.5
-valve lash
in 0.15mm
ex 0.20mm
-ignition timing
15 deg.
-engine timing
its ok ( set properly )
-cams are proper alignment
-compression check
cylinder 4 - 11.5
cylinder 3 - 12.5
cylinder 2 - 11.5
cylinder 1 - 12.5
#5
Honda-Tech Member
Thread Starter
Re: b16a1 fluctuating idle 200 rpm . HELP
what is FPR ?
my engine manual / service says the ignition timing is 15 +-2 ( 13 , 14 ,15, 16 , 17)
tried on 16º .. didnt solve idle problem
my engine manual / service says the ignition timing is 15 +-2 ( 13 , 14 ,15, 16 , 17)
tried on 16º .. didnt solve idle problem
#7
B*a*n*n*e*d
iTrader: (1)
Re: b16a1 fluctuating idle 200 rpm . HELP
test the coil and ignitor
u have a chipped ecu or stock?
its idling at 1100 rpm when it should be at 750-850rpm
your coolant temp looks like only1/4 if that's as high as it goes that means your thermostat is stuck open(failsafe)
which means the engine is not at full operating temp
high idle can also mean vacuum leaks and they are sometimes not very easy to find
u have a chipped ecu or stock?
its idling at 1100 rpm when it should be at 750-850rpm
your coolant temp looks like only1/4 if that's as high as it goes that means your thermostat is stuck open(failsafe)
which means the engine is not at full operating temp
high idle can also mean vacuum leaks and they are sometimes not very easy to find
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#8
Honda-Tech Member
Thread Starter
Re: b16a1 fluctuating idle 200 rpm . HELP
the vacuum system was verified with proper gun, and check the tubes, tube are like new
check with proper smoke equipment (smoke will emerge on leaks)
test it with carburettor cleaner
i have no vacuum leaks
sorry about the coolant ( to use s2000 cluster it needs a converter for speed ans coolant, i sent the converter to tuned the speed to have the REAL GPS speed, so the coolant is working good, but without the converter the coolant dont work )
check with proper smoke equipment (smoke will emerge on leaks)
test it with carburettor cleaner
i have no vacuum leaks
sorry about the coolant ( to use s2000 cluster it needs a converter for speed ans coolant, i sent the converter to tuned the speed to have the REAL GPS speed, so the coolant is working good, but without the converter the coolant dont work )
#9
Honda-Tech Member
Thread Starter
Re: b16a1 fluctuating idle 200 rpm . HELP
i made other approach...
i decide to disable the first oxygen sensor on the ECU ( on BRE )
idle problem solve, with 1st o2 sensor DISABLE and 2nd O2 ENABLE
(i think thats why the idle start after 30s, because is when ECU starts making adjusts on AFR)
do i have the 1st o2 sensor defective ?
my ECU gives me NO errors
is normal to have a defective sensor with no ECU error ?
could be a exhaust manifold leak ? a leak on 1st o2 sensor hole ?
just cleaning solves the problem ?
i decide to disable the first oxygen sensor on the ECU ( on BRE )
idle problem solve, with 1st o2 sensor DISABLE and 2nd O2 ENABLE
(i think thats why the idle start after 30s, because is when ECU starts making adjusts on AFR)
do i have the 1st o2 sensor defective ?
my ECU gives me NO errors
is normal to have a defective sensor with no ECU error ?
could be a exhaust manifold leak ? a leak on 1st o2 sensor hole ?
just cleaning solves the problem ?
Last edited by gabrielsousa; 06-11-2014 at 03:51 PM.
#10
unless the magic idle adjustment fairy came and turned the idle adjustment screw while you were sleeping, ignore what this guy said and fix the actual problem instead of creating another one
#12
Honda-Tech Member
Thread Starter
Re: b16a1 fluctuating idle 200 rpm . HELP
#13
i would replace the upstream oxygen sensor with a Denso ... it helps to know what your exact year, make, and model
after replacing the oxygen sensor you will need to reset your base idle if you fiddled with the idle adjustment screw already
after replacing the oxygen sensor you will need to reset your base idle if you fiddled with the idle adjustment screw already
#15
Honda-Tech Member
Thread Starter
Re: b16a1 fluctuating idle 200 rpm . HELP
found out that the second o2 sensor had the wire cut
replace the second o2 sensor (for a used one), and didnt solve my problem
replace the second o2 sensor (for a used one), and didnt solve my problem
#16
Honda-Tech Member
Thread Starter
Re: b16a1 fluctuating idle 200 rpm . HELP
PROBLEM FIX
(i think my problem was the o2 sendor harness to the ecu)
(i think my problem was the o2 sendor harness to the ecu)
i decide to change my ecu pw0-x00(obd0) to obd1
so, i made this changes.
-b18c4 exhaust manifold
-p28 ecu (chipped with p30 map)
-td-86u dizzy with obd1 plugs
-4 wires o2 sensor
and now with o2 sensor enable i dont have fluctuating idle
THANKS TO ALL !!! for helping
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