Fuel economy
- Thread starter Nero Morg
- Start date
Nero Morg
Top Post Dawg
I am vented, and I fill my tank slowly to prevent foaming. I filled up last night. I'm now at 28 mpg. I believe my injectors are all messed up. I'll be having them looked at soon.If you vent the tank you can see readings like this:
PakProtector
Veteran Member
You are in danger of wrecking things there Nero. Sooner is decidedly better. Like *RIGHT NOW*
cheers,
Douglas
cheers,
Douglas
mrfiat
Veteran Member
- Joined
- Mar 24, 2008
- Location
- Los Ranchos, NM
- TDI
- 2003 Jetta TDI (Reflex Silver) , 2003 Jetta TDI Wagon (Black)
Nero, I'm getting 28-32 mpg (in the city) on my wagon with a stage 4 tune, same as you. VW's spec says the injector balance should be +2.0 to -2.0 of each other and you are well within that. Here are my injector balance #s:
.24,.38,.-19,-.45 (at idle)
.56,.59,-.52,-.66 (at 1500 rpm)
.24,.38,.-19,-.45 (at idle)
.56,.59,-.52,-.66 (at 1500 rpm)
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Nero Morg
Top Post Dawg
Franko6 says the numbers, for best fuel economy, should be within 0.20 of each other. I pulled my injectors and dropped them off at the post office. I'll follow up when I get them back and see how it performs.
On another note, they were pretty clean still for only having 3k miles on them.
mrfiat
Veteran Member
- Joined
- Mar 24, 2008
- Location
- Los Ranchos, NM
- TDI
- 2003 Jetta TDI (Reflex Silver) , 2003 Jetta TDI Wagon (Black)
If the injectors are all you change and your FE goes up, please let me know. I did read that just because your injector timing is off, it doesn't mean that there is anything wrong with the injectors. Could be different compression in each cylinder, etc.
mrfiat
Veteran Member
- Joined
- Mar 24, 2008
- Location
- Los Ranchos, NM
- TDI
- 2003 Jetta TDI (Reflex Silver) , 2003 Jetta TDI Wagon (Black)
Any word?
35 Yr Dsl Veteran
Veteran Member
You are COMPLAINING about being 1/4 tank down at 405 miles?
mrfiat
Veteran Member
- Joined
- Mar 24, 2008
- Location
- Los Ranchos, NM
- TDI
- 2003 Jetta TDI (Reflex Silver) , 2003 Jetta TDI Wagon (Black)
I better be patient. You should run through one tank at least to see if it makes any difference and that will take a while.
Nero Morg
Top Post Dawg
I assume he'd be able to tell if a nozzle is bad on the bench, between leaking down and incorrect pop off pressures, along with incorrect flow. I kind of hope he finds something wrong just so I can get some better nozzles through him
Brief update, didn't feel the need for a new post. Frank had something come up, so he'll get to my injectors either this evening or tomorrow, and I'll follow up then.
Brief update, didn't feel the need for a new post. Frank had something come up, so he'll get to my injectors either this evening or tomorrow, and I'll follow up then.
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Nero Morg
Top Post Dawg
Just got off the phone with Frank. He had to repair two nozzles, injector 3 was way over shimmed, and he found out that the injector body for #3 is not repairable, something about a check valve seized in it or something. So that is fun. I'll be getting them back soon, and I'll follow up what my fuel eco is after a tank or two.
Fahrvegnugen
Veteran Member
Bosio nozzles? I keep running my stock nozzles even with a leak down because I wouldn’t enjoy these shenanigans after all the time and money spent. Pro nozzle build and balance with improperly shimmed injectors, still new and one failed. I’m waiting for a sure bet. Good juicy thread
ahldailydriver02
Veteran Member
I would be curious to what your IQ deviation will be when you get them back from Frank. When I put my DLC 520s in I was told that the IQ deviation didn't have to be 0.20 from each other because our single pump controls the injection for all 4 injectors, so they won't be the same. Our pumps are not a common rail system and that is why the numbers will be off. I don't how much truth there is to that because that is more than my knowledge base. I believe the last time I checked my numbers were
0.00 0.05 0.35 -0.45 at idle
0.31 0.02 -0.02 -0.33 at idle
Anyone else want to chime in on this?
BobnOH
not-a-mechanic
I'll chime. Frank has forgotten more about this than I'll ever know. But I'm not buying 0.2 as a maximum optimal rage, more like 2.0 max is what most report. The spec says -2 to 2 that's a spread of 4. Rarely do we see that much.
Let's understand what these numbers are. From MoGolf-
Group 013
This group shows the smooth running control injected quantity cylinder 1 - 4, left to right. Values expected -2.0 - + 2.0 mg/R
This is showing how the ECM is balancing the power for each cylinder at idle to account for variations in component tolerances, jet sizes, compressions, etc.).
Anxiously awaiting Nero's results.......
ahldailydriver02
Veteran Member
Yeah I was wondering about that 0.2 statement, 2.0 sounds more realistic. My car runs fine with those numbers, but wasn't sure if I should be alarmed. As for Nero, I am curious to see what his numbers are when he gets them back in and running.
Nero Morg
Top Post Dawg
To reiterate, yes max spec may be +/- 2.0, but that's the max I've ever seen them go. I believe that's the full range of control the pump has. Frank said my #3 was running at -1.85 while the rest were within +/-0.20 after making repairs, As Frank put it, my #3 was over fueling to the point of melting pistons if I drove it spirited all the time. Luckily I didn't. I should be getting my injectors on Sunday. I so can't wait to get my car back.
ahldailydriver02
Veteran Member
Well good thing you had the sense to stop and take them out. Keep us posted after you re-install them
BobnOH
not-a-mechanic
I've seen folks report readings beyond 2, rare.
Nero Morg
Top Post Dawg
Well, day 3 is about to start with the injectors in. So far, Sunday and Monday, tons of power, and no more white smoke. Even if I really goose the heck out of it, all I get is a small poof of black at initial throttle and that's all. What a tremendous difference. Found I have a park brake that's not fully releasing, I'll address it then fill up to see what the fuel eco is. On another note, tried calling Kerma about the injectors being as messed up as they were. It didn't go well.
STDOUBT
Veteran Member
Post them numbers, Son!
ahldailydriver02
Veteran Member
Glad to hear that you are back up and running! Yeah that parking brake can really affect your mpg not to mention the wear on that rotor.
Can you elaborate on "didn't go well" statement. No need to trash a vendor, just curious about your injectors and what Kerma thought was the problem.
Nero Morg
Top Post Dawg
Whoever I was on the phone with was immediately on the defensive about their product, and refused to do anything. I'm not here to slander vendors, but after this experience I'm done with Kerma, and I'll leave it at that.
Nero Morg
Top Post Dawg
Here we go, a few screenshots of my injector balance after working out a bug with Frank. Definitely TONS better than before. As soon as I replace my caliper thats sticking, I'll fill up and post my fuel eco. So far, with my Scangauge, instintanious fuel eco and trip average are a lot better!
ahldailydriver02
Veteran Member
Very interesting, I might have to check mine out again and see what it is showing now after a couple thousand miles on the injectors.
Nero Morg
Top Post Dawg
Well this is a first! About an hours worth of driving, half city half freeway. Helped a friend move. Also fixed the stuck caliper today, and tomorrow new tires. So I'll fill up after the tires are put on and run the tank out, and report back. But so far it looks promising!
wonneber
Top Post Dawg
- Joined
- Oct 12, 2011
- Location
- Monroe, NY, USA
- TDI
- 2014 Jetta Sportwagon,2003 Jetta 261K Sold but not forgotten
Which car was this?
Nero Morg
Top Post Dawg
My 2003 jetta wagon.
Louie710
Veteran Member
Where can i get one of these?