I am dealing with a 02 Excursion with 238K on the clock. When cold chugs pretty good until the truck on the road. I'm sure it's due to tired injectors but could you take a look at my data and tell me if you see anything glaring? Only mod to the truck is the red waste gate line is pulled and plugged. Thanks!

 

Friendly FYI on forum etiquette; if you want to talk with someone in particular the Private Message is provided for this purpose. If the subject line is addressed to one guy others who can help you may not look. And a data log should have lots of eyes on it. Give your post the best chance of success by keeping the subject line on point.

Besides, if Rich doesn't make parole this time you might be waiting a looong time.

Which is a joke, of course.

 

Yeah... you may want o edit that post in Advanced mode - this will allow you to change the title. You can always name it something like "Need help with my data log" or something similar. There are those that can help, but are not anxious to open yet another Tugly thread. More eyes on the log has a better chance of success - I ar hoomawn and maik miss steaks.

 

Welll.... I'm gunna guess that's Giotto, because I've never seen the older versions of AE mess up the FIPW data. The next time you tinker with it, set the Scale Value of your Fuel Injector Pulse Width to 2, and you will get the true numbers.

Your IPR is a little weird, but it's stable. I suspect the ICP, but not enough to put any money on it. Your EBP is real high compared to MAP, I would want to see a KOEO (engine not running) reading on your EBP, BARO, and MAP to make sure your sensors aren't having an argument over what your altitude is. If your altitude is about 600 feet, then you are getting about 18 PSI boost - a good number.

A 0-50 MPH run is not much of a WOT run, but I got enough to see it takes a long time to get up to that speed. Stock specs are 0-60 in ten seconds. I noticed your AE is giving one round of samples about every 2 and 1/2 seconds - pretty slow. You may need to visit your settings.

 

Sorry about the title. I don't post on forums that often so I usually learn the hard way!

As for the run to 50, that was starting at the bottom of a 14% grade with the throttle pinned. The hill is about a mile or so long.

The AE version is 12.2. Before I set the scale to (I will have to look again) it was reading .1 to .25.

I will have to hold off on this issue because the Ex decided it didn't want to start sp it's stranded at my sister's place until I can figure out why it won't turn over. I get a hard click from the starter (sitting under the Ex while someone tries to start it) but that is it.

 

Without the hard way, I'd learn nothing at all.

Only data that jumped out to me was IPR DC% never going past 39.45% or something. Might be related to scaling but stock it should go past that WOT. 65% is normal max when a tune takes it to the limit.

"When cold chugs pretty good" can be bad GPs, or the relay feeding them. Got white smoke at that point? Also try plugging in the block heater. What kind of oil is in there, dino or synthetic? How fresh?

Click at start on the Ex check the battery voltage when sitting and when attempting to crank. Clean and tighten the battery connections. Also manhandle the starter to see if the bolts are loose. If volts and starter are solid whack the starter with a hammer, the bendix gear might be stuck.

 

Whoa WHOA WHOA!! With full respect to my cleverly-named friend: 65% IPR is when things are going very wrong. If you have a balanced system of healthy injectors and HPOP, with no leaky injector O-rings or a hot tune, 40%-45% IPR is the normal max while running. Cranking IPR is a whole different matter - you can see 65% at times and this is normal. The goal at WOT on a stock tune is 2800 PSI ICP, with IPR about 40% - that's in this data set.

There are tunes out there in the wild that will pop P1211 and you will see the IPR climb to 100% while the ICP is anemic. Change the tune and you see the 40-42% IPR with 2800-3000 PSI ICP. The hardware is the same, but the tune is the only difference. 100% max IPR is on some tunes, 65% max for stock and other tunes. If the HPOP doesn't get it done by 65%, a higher IPR doesn't usually fix the problem - and it just sets the rig up for a huge pressure spike when you let off the throttle. I can't say this pressure spike does the ICP seals and HPOP components any favors. Here are two runs on the same truck on the same day:








I can already hear it: "But Tugly, that just means you need a new HPOP." Nope. I did the T500 and it helped, but it didn't fix the problem. I changed the injectors and no help. Tuning fixed it.

Chugging is very likely glow plugs when you first start. If you have chugging with a warm engine, and an IPR sneaking down to 8 or 9 on stock sticks with 500 PSI ICP... one impish injector pops to the top of the suspect list.

14% grade!?! Great job on picking the perfect run for WOT! Now I really want to see that KOEO with EBP.

 

Could this chart be showing defueling at 2900 RPM - independent of boost?

 

I have recently learned that the truck will defuel at about 2700-2800 RPMs with stock tune. What that means is let the truck shift when pushing it - allowing the RPMs to drop and regain your torque. That just goes to show there is always some nugget of knowledge to glean from these logs.

 

Thanks for helping on this issue. I ordered a new starter so hopefully I'll have her back on the road to gather more data. Thanks again, this is a great community!

 

I should have been more clear. On all software or scanners I have seen, the absolute max IPR DC you will ever see is 65%. I did not mean that 65% is normal operation, that is indeed a red flag of trouble, when hpop oil is basically blowing through the system building little pressure. When someone reports 100% DC, that suggests the hardware is set up with non traditional scaling.

The complaint on this truck is lack of power. We see IPR DC get to 39.45% and stop like it hit a brick wall. Seems to me that's the problem, unless his scaling goes to 100%.

 

Lines 117 and 118 popped 40% on the IPR, so I get the impression the IPR command is sound. Like you, my "Spider Senses" are tingling here - I get this odd feeling the ICP sensor is a little off. I'd like to know if the sensor connector has oil in it.

 

...to the party!

A couple of things about your log.

1. You are missing some key PIDs, including Boost and Baro

2. Your file is not a CSV file. It is delimited with semicolons {;} so you should be saving it as a .txt file

3. I couldn't find a big section of WOT, only about 0-50 (which was a nice run, BTW, just need a bit more if you can)

Here's what I was able to graph. (FIPW x10 to move it up into the graph)

 

Wow thanks guys! I will get a new starter in it and log some more. Appreciate the help!

 

We don't need MAP and Boost, just MAP or Boost. MAP is in there, so I can at least compare it to EBP, but a good KOEO (no need for the starter here) with MAP, BARO, and EBP would be very helpful.

It was an incredibly long WOT run - look at the time stamps. He was going uphill on a 14% grade... he did great.

Now... we just need to get the FIPW to the scale value in his software where it registers 0.6 ms KOEO. Once he has that, the FIPW will be accurate.