Quote:
Originally Posted by jeffcat
I've only had the car for a couple weeks now, and I'm just getting around to routine maintenance right now, but after that, I'm going to get into aero mods, and guages like MPGuino, scanguage, vacuum, etc. after I research them a bit, but I know little about hooking them up for the VX or what each one specifically reads, so I'll have to look into it more.
I changed the engine and trans fluid, so next up, I have a new air filter, and I might just take the entire intake off to clean out the EGR valve, IACV, and entire intake assembly where the EGR ports are. What about the spool valve? Does that ever get dirty or need maintenance done to it?
It just seems odd to me that with the tires at 50psi and cruising at 65mph, that I'm popping in and out of lean burn on level ground. I figured it probably wouldn't do that until 75 or so, but I'm not experienced on that matter. On level ground, how fast can you guys go before you fall out of lean burn in mph and RPMs?
|
Pull your intake and clean the EGR, passages and the ports under that plate. If it's like the y5 they'll be clogged. Do not miss the little holes that feed EGR into each cylinder. Chances are those are clogged and are easy to miss.
Test your EGR valve also. Use a VOM and make sure the position sensor is actually working.
It seems my car is very sensitive to a PROPERLY functioning EGR for LB to happen more. When my position sensor was faulty I always had one of two pending EGR codes. I would still get LB but it seems MUCH easier now that I have resolved those issues.
The IACV will also be dirty. Pull it and clean it out + the screen.
I think you're going in and out of LB because your VX gears keep your rpm's soooo looowwww. My car LOVES 2700 rpms for LB. Once it's in LB I can let the rpm's go down to as low as 1800 rpm's at times and as high as 3099 rpm's. Anything above 3100 and it immediately kicks out of LB.
You can't use a Scangauge or Ultragauge. Your only real option that I can think of is MPGuino. The first 2 gauges require OBDii which you are not and they really don't work to calculate MPG on a LB vehicle either.
Try cruising in 4th gear at highway speeds, make note of your RPM's. See if LB is easier to engage and keep engaged.
I'm not sure if it's better to cruise in LB at a higher RPM or shift to a lower one and never get LB.
Once I have my MPGuino in hand I will be testing this kind of stuff.
I have a hunch that I will be better off at a higher RPM in LB vs lower RPM and no LB when cruising.
Keep in mind, all the LB talk I mention is how the HX behaves. I can't see the VX being that much different.
I am running a DX geared transmission so 60-75 mph in 5th keeps me ~2400 to 3100 RPM's. Perfect gearing for LB at highway speeds for me.