ECMlink 1g DSM How to interpret this log?

[zippy22]

in my recent data logs it’s saying I’m running lean but compared to my data logs from when I got my car it’s using more fuel according to fuel flow I’m getting 100 more cc than before yet wide band is saying I’m running lean
The photo without wide band on it would top at like 15 to 1 which is still bad but not as bad as 17 or 18 that happens as soon as I hit boost I’m wondering if it’s my fuel pump going out and not keeping pressure or alternator/ fuse box connected to the battery I heard those wear down too

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[19Eclipse90]

How to load a DSMLink "Log" to a thread.

 

[steve]

We really need to see the actual log file not pictures of it so we can see how you have the ECU configured.

It's not unusual for your wideband and ECMLink to differ AFRatioEst is what the ECU is trying to get and assuming your PLX is integrated correctly it thinks your actually getting 5.5 AFR leaner. That could be fuel pressure or incorrect fuel parameters in DSMLink which is why we need to see the log.

Do you have a gauge on your FPR?
A profile for you car would also help, so we know what's in it.

 

[zippy22]

i think those are the right logs i can setup a car profile soon

 

[steve]

Thanks.
I looked a bit at the most current and the VE Table is a little rough for me, With all the Omni failures we've seem lately I'm a bit gunshy. I'll let some others look while we wait for the profile so as to not play 20 questions.

 

[zippy22]

I just posted it I will update gages and whatnot soon too

 

[steve]

E85 tune? The global was for much smaller injectors so I assume it must be for E85.

 

[zippy22]

No I had to turn it up so my afrs were lower cause it started idling at 15.2 I feel like I might just need a new fuel pump but want to make sure that it’s that bScot I spend 150 for a new one for no reason

When I got it it ran at -72 which still doesn’t sound perfect but it worked than

 

[steve]

Before I'd buy any parts I'd check whatever I can. That's why I asked about the fuel pressure gauge. Looks like you have an AFPR on the firewall and I'd expect one for all the other mods. I'd check the pressure at base and use some shop air to see if it tracks 1:1. If not I'd pull the pump and make sure it's not leaking in the tank.

 

[zippy22]

what do you mean pressure base

If you mean turn on the pump and see if it’s at the same pressure as ecm link shows it is when the car is on it sits at 40 with pump on car off ecm link is set to 37

I will say the pump has gotten pretty loud since I got the car and it changes pitch with my blinker so I thought maybe power like alternator but they test good “I have put in multiple to see if that’s the problem” I’ve had other people say maybe the fuse box that is on the battery terminal but with how my data logs are i don’t know it’s really hard to tell

 

[steve]

Your base fuel pressure is what the FPR regulates the FP to when the pump is on and the vacuum line is disconnected from the FPR and plugged (so it's not a vacuum leak). Usually just turning the pump on in ECMLink while the engine is off is pretty close to the same thing but that depends on the condition of your battery. Testing while the car is running also includes the FPR/Pump keeping the right pressure when the engine is eating some of the fuel. The FSM then has you check with the vacuum line on to make sure the fuel pressure drops because of the manifold vacuum. (remember to convert from inhg to psi when calculating the drop amount cause by vacuum)

Unless you have an aftermarket fuel pressure sensor (which I didn't notice configured) ECMLink doesn't have a way to report actual fuel pressure. You have to tell it what the base is when you calculate your global.

I'll check it again but I think your battery voltage in the log was at least 13v. The Walbro's tend to be loud and at some point they began shipping with a foam sleeve to reduce the noise. The will change their sound as the voltage changes but unless there is a problem the pump should be able to hit the base fuel pressure easily.

 

[zippy22]

Why I only turn on the pump it’s at 40 start the car 37

I have been told to get a fuel pressure sensor so I can log in ecmlink but I’m not sure how I would wire it

 

[steve]

Your battery voltage stays in the 13v range so it's seems to be getting charged.

I don't know what reasonable for S2 cams was far as idle vacuum or how much to adjust for altitude of 1800ft, the Omni MAP shows it jumping around so I can't guess.

You have a Auto but all the things that would be normal for a 1G Auto have been changed so you might want to just set the base fuel pressure to 43.5 psi (3 bar) and base your fuel calculations off that. If you had normal idle vacuum (~20 inhg at sea level) that would mean you'd see fuel pressure of about 43.5 - 9.8 = 33.7 psi with the vacuum line on at idle. FIC says these are high impedance injectors (so no injector resistor) and average deadtime of about 820us @ 13.5v. You're currently modifying both the global deadtime and the InjbyBat and between the two you at about 885us. Running the calculator in ECMLink using 2150cc/min @ 43.5 psi would be a -80.7% global vs the -68% you currently have. But that would get you less fuel that you have now.

I'm not sure we can trust either of the MAP sensor or the wideband data in the log. Once the car gets into closed loop the CombinedFT is pulling almost 10 to 22% more fuel out. I really like having a stock narrowband in the O2 housing to validate the WB operation and see if both are in sync while the ECU is in closed loop.

I couldn't find a steady spot where you were at idle with no throttle input and in closed loop.

If you wanted to log fuel pressure you have the EGR Temp input open on the ECU.

 

[zippy22]

I’m definitely gonna try to log fuel pressure at a certain point so thank you for letting me know. I had the EGR input open. Would
that be difficult to do.

 

[steve]

Here's a few references. Note you'll have to read between the lines due to the differences between 1G and 2G ECU's

ECMlink - 1g fuel pressure sensor wiring

Hey guys! I’m installing a 5v fuel pressure sensor. I’ll be using the egr temp input. Just want to make sure these are the correct pins.You must be registered to see element.Thank Tony

www.dsmtuners.com

2G - How To: Install a fuel pressure sensor & log with ECMLink

I'm going to show you how to install a fuel pressure sensor and log it with ECMLink.First off, I was going to purchase a name brand fuel pressure sensor but after talking to a few people, I just went with an el-cheapo off eBay. Just make sure it's a 5v fuel pressure switch- I went with 100...

www.dsmtuners.com

Fuel System Troubleshooting | Six Sigma Dyno Tuning | United States

Fuel System Troubleshooting

www.sixsigmatuning.com