410 replies to this topic

[LukeFranky]

Thanks, though I thought knock correction and learning was on there.

I used ecuExplorer because it was easier to get going than rom raider. I'll look into rom raider later.

I'm worried I'll burn a hole in my piston if I keep driving it, but to get the fuel pump tested I need to drive about 2 hours to my old man's workshop. Unless I pay someone else.

Any thoughts on the exhaust leak?

[natho]

I don't think all the knock correction parameters are on there.

Learning view is a separate app too, very easy to use. Will take you 1 minute.

I have a spare stock fuel pump I could send you if you want it.

[RX25SE]

What is the difference between Air/Fuel Correction and Air/Fuel Learning?

 

Is one Long Term Fuel Trim and the other Short Term Fuel Trim? (I speak fluent GM but not Subaru. ) 

[natho]

http://www.romraider...m/topic339.html

[LukeFranky]

Is it normal that the "rear o2 sensor rich signal" is on?

[natho]

I don't know what that parameter is, I don't recall using it before or even seeing it in romraider.

[Jimbo]

Has anyone put any thought into the catalytic converter shitting itself?

[LukeFranky]

So I was just playing around with RomRaider with the car idling. Turned off the A/C, later noticed the temp gauge through the roof. Coolent temp read 90c in rom raider. The radiator fans aren't turning on.

 

I'm hoping it is just an air lock from when I changed turbos, but I bled the system the same way I always have by letting the car idle up to temp while massaging the hoses. I have heard Subarus are suckers for air locks but I've never had a problem before now.

 

I assume the fans run off the CTS? It is a new one.

 

Anyway, I managed to get into some data with RomRaider but couldn't get into the learning view for some reason. Any tricks to using it on a B4 natho? It kept giving me a generic error.

Also, unlike ecuExplorer, RomRaider does not like reading the Manifold Relative Pressure either.

[natho]

i use both romraider and learning view regularly. what's your ROM ID? this should be showing in the lower-right of the romraider window from memory.

[LukeFranky]

Tried bleeding the car again this morning, no difference. Fans just don't come on if the air con is off. Thermostat seems to work fine as the bottom hose gets hot when it should.

 

I'm going back to the old CTS tonight, then will sort out RomRaider. Who knows, maybe the new CTS is a dud.

 

Now that I can see some real data from my car I might disconnect the MAF and see what the O2 sensor does with the car running to defaults. My thinking is: If it runs lean without a MAF then it might be fuel supply or exhaust leak. If it runs fine or rich then it is most likely intake related. Let me know if this is a flawed assumption.

[Robbks]

So I was just playing around with RomRaider with the car idling. Turned off the A/C, later noticed the temp gauge through the roof. Coolent temp read 90c in rom raider. The radiator fans aren't turning on.

 

90' isn;t through the roof.
I don't think they even come on until 92'

[LukeFranky]

Yes, I know 90c isn't through the roof. But the car's temp gauge was. Either the CTS is reading wrong or it has an air lock.

[natho]

Not all cars use the CTS for the temperature gauge. I can't remember if the b4 does or not. Does the top hose have pressure when warmed up? If so its unlikely you have an air pocket.

[LukeFranky]

Yeah, plenty of pressure on the top hose.

Must have a different sensor for the temp gauge, ECU is reading a lot lower than the gauge. One of those sensors is likely faulty, I'm thinking CTS.

[LukeFranky]

Fixed the overheating issue. It was the new CTS. Swapped it back to the old one and the fans switched on when they are meant to.

 

Since the CTS was playing up maybe it effected my data log so I reset the ECU and did another couple of runs using RomRaider. Tried to include everything important. See file attached.

 

Thanks again to all who have helped so far.

Attached Files

•  Documents.zip   13.98KB   8 downloads

[natho]

hard to tell what's going on from those logs - a few parameters are missing or have the units set in a way that requires conversion. most of that driving is also under very low load so it's in closed loop. i can see some minor knock in one of them, but one of the parameters really needed is missing (IAM).

 

interestingly your ROM ID is for a late JDM ROM. Not sure if that's just what's flashed on when ecutek is used, or if your car is JDM.

 

are you able to get your laptop online while the car is running, e.g. idling near the house? if so i could share your screen online and help you select some parameters. i'd then suggest getting it to trigger the CEL while you're datalogging.

[LukeFranky]

I can get online with my phone. I'll message you about it.

I included almost everything that works on that log. Quite a lot of the available parameters break the connection and it won't read anything until I turn them off.

Maybe RomRaider picked up the wrong ECU and needs to be told what it should be using? I know plenty about computers but not much about RomRaider itself.

Car doesn't need to be under high revs to bring up the code. Something like 3000rpm, half throttle, 6psi up a steep hill will do it.

[Robbks]

There are some HUGE AF corrections there.
and them showing at low-load (under closed loop) shows that there is much more airflow through the engine than it was tuned for.

all of the post-tune intake mods have shown what is usually seen, lean conditions.

If you remove restriction post MAF, it affects the MAF signal.

Where did the "new" CTS come from?
As some will provide a different resistance for a given temperature, it needs to be the correct one for your specific model
 

[LukeFranky]

The CTS came from Ebay. I believe it is a the correct one. Tridon brand.