|
|
|
|
Thread Tools | Display Modes |
04-19-2012, 12:17 AM | #1 |
Scooby Newbie
Member#: 249890
Join Date: Jun 2010
Chapter/Region:
Tri-State
Location: Ardsley, NY
Vehicle:1995 Impreza L wag white |
ej20g robs knock light
Hi guys,
So i have an ej20g v1 with robs tune on stock injectors. Every possible maintenance has been done on the motor save for removing and cleaning/flowtesting the injectors mbc at 15psi full 3" catless v2 sti slanty coilpack conversion In short the motor runs great and I hear no audible "knocking" at any time but often when I get on it the knock light flashes a significant amount, but I don't hear or feel anything out of the ordinary. Are my injectors maxed out? Do I need to upgrade to the 550's? Is my knock sensor just overly sensitive/going bad? In addition, whenever I go on the highway and come off my fans kick on immediately as if the car is running somewhat hot, but the temp needle doesnt actually budge at all. The car is closed deck so maybe it just runs somewhat hot?? Input much appreciated, Alex
* Registered users of the site do not see these ads.
|
04-19-2012, 12:22 AM | #2 |
Scooby Specialist
Member#: 206851
Join Date: Mar 2009
Chapter/Region:
MWSOC
Vehicle:56 Belair Pro Street |
any codes?
have evoscan? It is likely bad gas, a faulty knock or ect sensor. |
04-19-2012, 12:30 AM | #3 |
Scooby Newbie
Member#: 249890
Join Date: Jun 2010
Chapter/Region:
Tri-State
Location: Ardsley, NY
Vehicle:1995 Impreza L wag white |
no codes. What is evoscan?
|
04-19-2012, 12:37 AM | #4 |
Scooby Newbie
Member#: 249890
Join Date: Jun 2010
Chapter/Region:
Tri-State
Location: Ardsley, NY
Vehicle:1995 Impreza L wag white |
I have read that the ect sensor is only bad if the fans kick on automatically before even starting the car, with the ignition just turned to the "on" position. Is this true? do you have a p/n for the ej20g knock sensor and do you know where it goes?
|
04-19-2012, 12:42 AM | #5 |
n00b Moderator
Moderator Member#: 811
Join Date: Jan 2000
Location: WA
Vehicle:2000 RS-Ej20G It tastes like burning |
If you free rev does it flicker? I would recommend trying to lower the boost and see if the frequency drops. You can also run the tank low and put in 1/4 tank of race gas to see if it goes away. My custom code will flicker the CEL once the ECU has determined a real knock event has occurred and is taking action to counter.
One other important note is that one side effect of my code is that when the CEL comes one for a real code, the light does not stay on solid, it flashes real fast (almost looks dim). If you are getting an intermittent CEL, it might look like sustained, severe knocking. In that case you would be able to connect the black diag connectors and have it flash a code as normal. -Rob |
04-19-2012, 12:47 AM | #6 |
Scooby Newbie
Member#: 249890
Join Date: Jun 2010
Chapter/Region:
Tri-State
Location: Ardsley, NY
Vehicle:1995 Impreza L wag white |
free revving hardly makes it flicker, very rare. I will try lowering the boost and see what happens, I was going to try octane booster because i dont have easy access to race gas. Is it possible that my knock sensor is messed up in some way?
The car has no codes, btw. Also, Rob, when will the z32 tune be ready?!? |
04-19-2012, 12:54 AM | #7 |
n00b Moderator
Moderator Member#: 811
Join Date: Jan 2000
Location: WA
Vehicle:2000 RS-Ej20G It tastes like burning |
Another comment I will make is the stock temp gauge is near useless. The needle will basically stay parked in the same "normal" spot between 160-220F.
|
04-19-2012, 12:55 AM | #8 |
n00b Moderator
Moderator Member#: 811
Join Date: Jan 2000
Location: WA
Vehicle:2000 RS-Ej20G It tastes like burning |
|
04-19-2012, 12:55 AM | #9 |
Scooby Newbie
Member#: 249890
Join Date: Jun 2010
Chapter/Region:
Tri-State
Location: Ardsley, NY
Vehicle:1995 Impreza L wag white |
if turning down the boost fixes the knock light issue, do you think I should upgrade injectors?
|
04-19-2012, 12:56 AM | #10 |
Scooby Newbie
Member#: 249890
Join Date: Jun 2010
Chapter/Region:
Tri-State
Location: Ardsley, NY
Vehicle:1995 Impreza L wag white |
|
04-19-2012, 12:56 AM | #11 |
Scooby Specialist
Member#: 206851
Join Date: Mar 2009
Chapter/Region:
MWSOC
Vehicle:56 Belair Pro Street |
no, figure out why youre knocking.
I assume you NAW YAWKAs don't get the creme de la creme of fuel. |
04-19-2012, 12:58 AM | #12 |
Scooby Newbie
Member#: 249890
Join Date: Jun 2010
Chapter/Region:
Tri-State
Location: Ardsley, NY
Vehicle:1995 Impreza L wag white |
|
04-19-2012, 01:02 AM | #13 |
Scooby Specialist
Member#: 206851
Join Date: Mar 2009
Chapter/Region:
MWSOC
Vehicle:56 Belair Pro Street |
you can't hear knock inside the vehicle while driving. it is not rod knock, it is pre detonation in the cylinders.
knock has a few causes: fuel air temp oil reducing octane timing exceeding mechanical limits, ie too high boost, too lean, too much timing, too much fuel faulty equipment- faulty maf/tps (that are the load basis of the ecu), ect (dictator of fuel and timing allowances) We also have a very lean throttle tip in value, so it is not coincedental this happens right when you get on it |
04-19-2012, 01:09 AM | #14 | |
Scooby Newbie
Member#: 249890
Join Date: Jun 2010
Chapter/Region:
Tri-State
Location: Ardsley, NY
Vehicle:1995 Impreza L wag white |
Quote:
|
|
04-19-2012, 01:11 AM | #15 |
Scooby Specialist
Member#: 206851
Join Date: Mar 2009
Chapter/Region:
MWSOC
Vehicle:56 Belair Pro Street |
I noticed a bit of icky getting into my G inlet system, but I am not using a fuel succeptable to any octane loss of significance
|
04-19-2012, 01:15 AM | #16 |
Scooby Newbie
Member#: 249890
Join Date: Jun 2010
Chapter/Region:
Tri-State
Location: Ardsley, NY
Vehicle:1995 Impreza L wag white |
^what fuel is that haha
|
04-19-2012, 01:17 AM | #17 |
Scooby Specialist
Member#: 206851
Join Date: Mar 2009
Chapter/Region:
MWSOC
Vehicle:56 Belair Pro Street |
ethanol
|
04-19-2012, 01:19 AM | #18 |
Scooby Newbie
Member#: 249890
Join Date: Jun 2010
Chapter/Region:
Tri-State
Location: Ardsley, NY
Vehicle:1995 Impreza L wag white |
nice; shouldve noticed from yr vehicle info lol. yeah i notice the knock light mostly on throttle tip in i would say. how concerned should i be about this?
|
04-19-2012, 11:17 AM | #19 |
Scooby Newbie
Member#: 249890
Join Date: Jun 2010
Chapter/Region:
Tri-State
Location: Ardsley, NY
Vehicle:1995 Impreza L wag white |
filled the tank up halfway with gas from a diff station and turned the mbc down half a turn and no more knock light! does this just mean i was exceeding mechanical limits (i.e. fuel) by having the boost too high and maxing out the injectors?
-Alex |
04-19-2012, 12:30 PM | #20 |
Scooby Newbie
Member#: 294590
Join Date: Sep 2011
Chapter/Region:
MAIC
Location: Cumberland/deepcreek md
Vehicle:2004 Wrx sti WRB |
You would have to try the gas with the boost up to know which one was the problem lol but id be afraid to turn up the boost if i was getting a significant knock. up to you haha i would stick w what works have fun get bigger injectors or get yours modded crank up that boost
|
04-19-2012, 01:14 PM | #21 |
Scooby Newbie
Member#: 257043
Join Date: Sep 2010
Chapter/Region:
VIC
Location: Vancouver BC
Vehicle:1993 JDM WRX Wagon Black |
There are actually a couple of unasked obvious questions.
First: What octane are you actually running. Where is the fuel from? Are you consistently running fuel from the same station? Second: Have you installed any actual gauges or are you trying to diagnose the issues only operating with information from Rob's knock lite and the Factory water temp gauge which really isn't actually a gauge as it is a needle that gives you a thumbs up/thumbs down on water temp with no useful data in between. Third: The water temp sensor on my EJ20G was quite screwy. The idle and fan operation completely changed when I replaced mine. There are actually two water temp sensors; one for that useless gauge and one for the ECU. It cost me $18 to replace to water sensor that goes to the ecu. Totally worth it. Fourth more useful gauges: oil temp, real water temp, A/F ratio(even if its a cheapo non wideband). Do you have any way to tell if you perhaps have a clogged injector causing one cylinder to run lean and therefore hot? What is your fuel pressure @ right now? Low fuel pressure can result in a lean condition in all cylinders. |
04-19-2012, 08:36 PM | #22 | |
Scooby Newbie
Member#: 249890
Join Date: Jun 2010
Chapter/Region:
Tri-State
Location: Ardsley, NY
Vehicle:1995 Impreza L wag white |
Quote:
1. im running 93 octane, the bad appearing gas was from a mobil station, and i just filled up at a 7 11 and their gas is the one i get most and don't have any issues with generally. 2. I have not monitored with actual gauges but my next purchases will be catch cans and an aem wideband so i should be able to feel things out better. 3. Should I replace the ect temp sensor? Where is it located on the motor? 4. I do have a walbro in the car but how would i measure fuel pressure? Since The knock light activity has gone away maybe it was just too much boost to handle on this injector setup, but I will continue to work towards fixing this issue anyway. |
|
04-19-2012, 10:35 PM | #23 |
Scooby Newbie
Member#: 294590
Join Date: Sep 2011
Chapter/Region:
MAIC
Location: Cumberland/deepcreek md
Vehicle:2004 Wrx sti WRB |
Advanced auto sells a $40 fuel pressure test kit which doesnt really mate up to the car so i bought 2 5/16 hose barbs that mate up to the t block the kit came with cut ur fuel inlet line put it in line good to go give me ur email i can semd u a pic if ur not completly sure what i mean
|
04-21-2012, 07:43 AM | #24 |
Scooby Newbie
Member#: 309883
Join Date: Feb 2012
|
Can you send me a pic of it too? I'll pm you my email
|
04-21-2012, 04:26 PM | #25 | |
Scooby Newbie
Member#: 249890
Join Date: Jun 2010
Chapter/Region:
Tri-State
Location: Ardsley, NY
Vehicle:1995 Impreza L wag white |
Quote:
thanks! |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
FS : (VA) ej20g stuff(inj, pfc, lights+more) | Subbiespeed | Engine/Power/Exhaust | 15 | 05-10-2012 08:22 PM |
FS : TurboXS KnockLite - stealth flat black - knock light and shift light | TROLL | Engine/Power/Exhaust | 0 | 02-03-2012 12:17 PM |
ej20g rod knock | renegado | Pre-2002 Factory Turbo Powertrain | 6 | 04-28-2011 06:03 AM |
knock light on tuner | hondaeater69 | Engine Management & Tuning | 19 | 10-27-2004 03:33 PM |
Knock light at very light throttle? | mr2guru | Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) | 5 | 03-10-2004 12:43 PM |