Running Lean

[Ian C]

I don't get this if your fuel pressure is correct and your duty cycles are correct, why the hell isn't it fuelling right? You got Cillit Bang in the tank instead of Optimax?

 

Where do you measure your fuel pressure?

 

-Ian

[bondango]

yeah steve have you a pic of how your regulator is mounted i.e. end of fuel rail returning to tank. With Ian on this, I cant not see how it can be running lean from everything thats been checked and is ok, would shitty fuel be enough to cause those conditions??..Im thinking is there anyway moisture or water coulda got in to the tank i.e. loose cap etc etc??

 

The EM connections on the injector harness to the ECU loom must be fine is the logs look ok, the only one i would investigate which wont show up on any logs is the EM main loom GREEN wire (MAF output) which connects to the loom heading to the ECU. If this was not connected properly or loose the ECU wont see the correct MAF signal - even though you can read what the emanage is seeing from the MAF, the ECU might not be seeing the same signal?

 

just more random thoughts :-(

 

 

EDIT: Unless your jspec lol i cant remember??

[Steve]

Ian i will drain out the Cillit Bang

 

It is a fresh tank of Optimax so should be fine

 

The Fuel Pressure is measured from the FPR (gauge screwed straight on the side)

 

Will double check all the vac hoses again tomorrow, as i think i can hear a rushing air noise from the intake side on tickover, so will pull that side apart.

 

Will get back if i find a dodgy hose or something (hope so anyway)

 

Thanks both for your help, will owe you both a beer

[Steve]

Right, have pulled off the intake and checked every hose and all are ok

 

So before i put it back together i thought i would check the resistance of injectors.

Here are the results:

1. 21.1ohms

2. 20.7ohms

3. 18.3ohms

4. 17.9ohms

5. 18.4ohms

6. 18.9ohms

 

Now i know the j spec use high impedance, but these seem a little high. Thought they were around 12 ohms ish?

 

These are the PE 650cc injectors

[Rich]

Right, have pulled off the intake and checked every hose and all are ok

 

So before i put it back together i thought i would check the resistance of injectors.

Here are the results:

1. 21.1ohms

2. 20.7ohms

3. 18.3ohms

4. 17.9ohms

5. 18.4ohms

6. 18.9ohms

 

Now i know the j spec use high impedance, but these seem a little high. Thought they were around 12 ohms ish?

 

These are the PE 650cc injectors

 

I had a similar problem and bought an electronic fuel pressure gauge which taps into where yor mechanical gauge is.you can then see if the pressure is rising with boost when you are driving it on the road.

[Steve]

When you rev the car the pressure does increase, but have fitted a Aeromotive to replace the stock FPR but no change

[Steve]

Just checked the injectors again, and now they are reading 14.3 ish which is more like it. But why would the impedance be high then drop off?

[Steve]

Just went for a little drive to see if there was any change at all. Tickover AFR's were still a little lean, but started to drive floored it in second AFR's went to 11.3 which is great:)

Changed gear and it went lean again. Tried flooring in second again and the AFR's went back lean 14.9ish. Couldnt get it back in the 11's no matter what i tried.

 

Could it be the emanage wiring harness with a loose connection that keeps making and breaking?

[SUPRALOOPY]

bloody hell steve your going through it a bit with your car...good luck m8

[Steve]

Cheers Dave, I will get there in the end

[bondango]

As i said Steve its always worth going over the wiring, sometimes people use trialing wires with bullets connectors which can sometimes loosen over time with natural car vibrations, same with solder joints which arnt 100%

 

at least its another thing to knock off the list

[Steve]

Thats tomorrows job then

[Steve]

Right have finally got round to checking all the wiring for the emanage, and all is ok, so its not that

 

Ian if you read this i noticed on the E-01 controller it has the injector correction factor set in there, should that be 0?

[Matt Harwood]

Ian if you read this i noticed on the E-01 controller it has the injector correction factor set in there, should that be 0?

 

 

If Ian's mapped it, I'm fairly certain it would be set at 0

[Ian C]

I've not used the E-01 so I don't know how it displays the global injector correction, but your map has 'before' injectors set to 440cc and 'after' injectors set to 440cc and a correction factor of 1.0 - i.e. that feature isn't used.

 

Smarty, have you tried making it run better by changing the load sites a bit? Would you like me to send you a test map that should run more fuel in order to try and see if it alleviates the problem? Although I wouldn't be comfortable with trying to map around the problem, as something has obviously changed since it was mapped, it could help highlight what the issue is!

 

-Ian

[Steve]

Ian, the only bit i have changed is the tickover settings, if i increase the setting to 12 from -15 it ticksover perfect at 14.6 (about right i think), it doesnt move from this, but as soon as i put it back to -15 is fluctuates from16.7- 14.9ish.

[Steve]

 

Anyone?

[Matt Harwood]

Steve, just out of interest, is you're E-01 definitly making adjustments correctly?

 

I've known cases where the E-01 locks up and causes problems. When this happens it seems to corrupt the E-manage and prevent any further adjustments. Usually running rich to be fair, but worth a try?

 

To check it, just let the car idle and make an extreme adjustment on the idle cell and watch the AFR gauge to see if it changes.

 

If the E-01 does need resetting, you need to go to the botom of the 'set-up' menu and select 'initialise' this will erase all its settings. Then, you'll need to input all the basic info like, number of cylinders, throttle type etc, then re-load the a fuel map and send it to the E-manage.

[Steve]

Matt, to be honest i dont use the E-01 for changing the emanage, just use it for altering boost.

 

I have even had the E-01 disconnected with the laptop on it and it still does it. As above if i increase the idle cell to 12 from -15 it ticksover perfect at 14.6 with no fluctuations.

 

Also which throttle type is it suppose to be set for on the E-01?

[Matt Harwood]

Throttle type should be 'normal' It tells the EM if the throttle voltage increases or decreases when applied.

 

Assuming you have the map Ian did for you, try resetting/initialising the EM unit via laptop, and re-loading the original map back into it. - Start the car, but don't connect the E-01 until you know if it's working properly or not.

If the E-01 has had a funny turn, the data in the EM gets corrupted, but all the numbers in the cells stay the same, so it looks like its all OK.

[Steve]

Is there a way of defaulting the emanage then?

 

Is it worth updating the emanage and software i have, i am still running 1.34/1.36 from memory. Have noticed on mohds site there is some new versions available 2.14 i think.

[bondango]

as Matt says its Easier just dis-conecting the USB from the EO-1 and reloading your map backup copy into the EM and take it from there - to Eliminate the e-01 from the equation.

You shouldnt need to update the EM firmware as things were working fine before hand. If you get the problem sorted then by all means update, but you want to eliminate the existing causes first steve.

[Steve]

Right, have tried uploading the map without connecting the E-01 and it stays the same

[Matt Harwood]

Just export the map from the laptop to the main unit, and that will clear anything that's already stored.

 

 

Damn... Too late. Shame it didn't work...

[Tricky-Ricky]

You have checked you throttle setting? if the throttle setting is lost this will cause some odd idle anomalies, also making adjustments to the injector or airflow maps at idle will only cause the std ECU to try to re adjust the AFR back to 14.7.