Car Runing Rough and Very Rich . Ecu Test Results
hey guys just did a self test on the ecu and came up with the following
12=AFM
13=Coolant Temp Sensor ( just replaced it)
14=Speed Sensor
21=ignition signal
23= throttle switch
24= neutral switch
34= knock sensor ( not running one)
31 aircon ( not installed)
i did a test on the afm and its showing 1.25v
why could the temp sensor not be working. problem with loom ???
any help would be great
car is running very rough . all the plugs are black as. and are only maybe a few hours old
well just replaced the plugs and its idling perfect. so what is causing the plugs to foul up
Way yo much fuel.
What injectoes?
Could it be timing maybe
new stock brown top vlt. timing is 15degs
most of the error codes can be ignored...
o2 in good cond, not black as a kettle from carbon? recently replaced? not 1,000,000 kms old like these engines manage to get with little maint? (guessing it's poisoned from the post above)
tuning it by the leds on the ecu as the gregorys manual? runs you through shorting out the temp with a resistor and adjusting the afm correctly, unplugging the tps to do so instead of relying on it "should be X volts" or "X ohms across these pins"? in a perfect world this would be true, unfortunately electronic components tend to disagree...
very rusty on the vlt ecu and it not having a knock sensor, how'd you get past this? just unplug it?(if so why au fuel is shit), i may be wrong but the ecu see's an error and goes to lh mode running rich with default timing, someone savvy with vlt ecu's hopefully can either confirm or deny this.
Last edited by Jxw; 23-01-2012 at 04:33 AM.
test spark for a strong blue spark, a weak coil will not burn properly, looking rich especially if the temp sensor is bodgy.
Did you get one of those shit ebay bosch ones or a proper triden one from spare parts shop?
My bosch one tested within range at room temp but went out pretty quickly when ant temp got in it.
yer i was thinking maybe not enough spark. got one of the triden sensors. just noticed somthing i throught maybe the fuel reg is causing the rich running and fouling. so i started to take the reg off and noticed no pressure when i d/c the fuel line. witch normally a big build up of pressure. ive just put on my n/a reg and car seems to be idling good. but will wait till tomorrow and see if the plugs are fouling up. im also looking around for a good afm or even new
Another VL Driver
Sea Dogs Champion!
Reset the ECU man and run another test and eliminate most of them with various things
as in Throttle Switch is cancelled by pressing the throttle to the floor and letting off
as well as neutral switch: shift the gear selector into 1st then reverse and back to park to cancel this code.
speed sensor: Car needs to move over 10kph so dont worry
as u said u changed the CTS: get car to operating temp and at idle. unplug the CTS plug and the revs should go up to about 1000 RPM plug her back in and Revs should go back to about 700-750 (depending on ur idle settings) if revs stay high ur CTS or loom plug is failing.
I was gonna also state the fuel reg man. I have a turbo Fuel Reg sitting here if u cant get a hold of one.
O2 sensor can cause rich as well not going into closed loop (staying in open loop so ECU is thinking engine is still cold)
Hows ya Air filter as well? (usually a carby run car is rich from dirty/restricted airflow) not sooo much on injected.
Good luck man let us know
hey guys did a test with the mutlimeter on the coolant temp sensor and when i put the mutlimeter on the plug to meaure omhs. the idle drops down a bit . when i take the multimeter off. the revs pick up, could this be a break in the wiring
Another VL Driver
Sea Dogs Champion!
did u do the test i stated above on the CTS by unplugging it while running and looking for engine rpm change.(Once engine is warm)
yep unplugged it and same but i gave the connection a clean plugged it back in and the revs dropped and it seems to be working now . thanks for your help bud. also what coin you after for the turbo reg.
Another VL Driver
Sea Dogs Champion!
sounds like ur CTS is workin then man.
Mate just have my spare reg.. send us ur addy in a PM and ill send it tomorrow if u get it to me tonight
cheers heaps mate i really appreciate it
pm sent
Another VL Driver
Sea Dogs Champion!
not a worry man ill Express it tomorrow. dont know if Aus Day will delay it though.
thats kool thanks heaps bud you sure you dont want anything in return
Another VL Driver
Sea Dogs Champion!
nah man im not a grub.. i got a rising fuel reg so i dont have a use for it. Just hope it helps with ur prob ur having, and i still have a NA plenum.(got a turbo one to put on.) so the bracket is wrong anyways
na dont worry about blasting it im just happy to have it
Another VL Driver
Sea Dogs Champion!
ok c what mood im in LOL would look good clean as ur bay is mint
haha cheers bud , just wondering with the cts sensor thats not working. you reckon that would rich the car up that bad to foul plugs. or many things. like afm.fuel reg etc
Another VL Driver
Sea Dogs Champion!
u said its workin now..
it wont do anything to ur AFM and REG but it will foul up your Plugs and O2 sensor as too rich gets Sooty... O2 sensors are sensitive to this soot and will give the ECU some bad signals. so u can clean it up. get new plugs. if u cant give em a wire brush to get u by..
Rich running u will get Black Smoke from exhaust.. more noticible when u give it a boot full and look in ya mirror for a Puff. :P
yer cts is working im just trying to get a idea of everything that will make the car run rich.anyway of testing the o2 sensor ?
Another VL Driver
Sea Dogs Champion!
can heat it with a propane torch and monitor its impedance ratings on a volt meter only small measurements are noted,, have a look at google for more accurate measurements. back it out of ur exhaust and have a look and see if its sooty. inspect ur plugs as well..
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