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You're right, and I need to get a spare. I'll be visiting your web site Leroy!

It will fail, and PMD's only fail at night on highways during snowstorms when exactly half way between the nearest exits.

Thanks for all that info! I do have a source of high quality BD, made from wvo, not virgin. I'm really beginning to think I'll stay away for now, maybe if I get back to running a lot of miles in the truck I'll reconsider. There just aren't many (any?) ways to save on fuel dollars. The wvo I...

I'm very tempted to run biodiesel in my latest 6.5, a '98 extended cab long bed that we are getting into running order right now. The 2 tank wvo system on my Suburban was fun at the time, but I won't go there again on a 6.5. So, have given bio some thought but reading threads like this make me...

I saw from your other post that the Technol helped, but didn't really solve the problem. Leroy is right, why not install a hot fox? Easy to plumb, no negatives to running one. You still could have starting problems, but at least once running you'd be fine. There just isn't enough return fuel...

I was surprised to hear that the odometer could read different from the speedo, thought they would be exactly the same. I just check my speedo's with gps, try a few different speeds like 40, 55, and 70 to get an average, and make corrections for mpg from there.

Huh??? Which vehicle??? Downhill the whole tank???

GW, you don't list your tires in your signature. Like you, my 4.10 Suburban got 15-ish at best, more like 13-14 most of the time. But, with the 235/85-16's it came with I did better, topping 16 at times. The 265/75's are heavier and have more rolling resistance, not to mention the wider tires...

So you've got decent fuel delivery, at least to the IP. Sounds like you're leaning toward OS being bad, I don't have any experience with that. I'd also wonder what Bison was suggesting, what your cold compression is.

I wasn't going to comment, now I think I'll chime in. Vegtech and I are friends, he's done a lot of the work on my Suburban, good guy and excellent mechanic. A message from Subclatter just got deleted, I'm confused, I think Subclatter and Robzombie are the same poster, but I'm not sure. If...

I see in your signature you have boost, tranny, and egt gauges. Do you have a fuel pressure gauge? If not, I'd hook a temp one on and see what you have when you are cold cranking. What was the result of running your lift pump prior to trying to start? If your LP is giving decent pressure...

Do you have high idle switches? Do they work? My brake switch was bad and it didn't allow the cruise to work, also didn't let the high idle switches engage. It's hard to get at but you might wiggle the switch around a bit and see if the cruise comes back.

I spoke to the guy that did the 2nd tank install for me. He said it's a standard GM saddle tank, he thought model 1B but wasn't sure. He said to get the tank, mounting clamps, and sender and the install was easy, fit fine. He also said there's a 6 way Pollak valve that would, with one dash...

The guy that did the install did a very clever job of putting 2 fuel fills behind the stock fuel fill cover. I'll see him tomorrow, try to get the details on the tank and take a pic of the fuel fill for you. Only filter is the stock under-hood filter manager. No fuel sock, just an open pickup.

I have a 2nd tank under my Suburban. The stock 42 gallon is for wvo, and we added a tank that fits under the left side of the frame for diesel. If I remember correctly it's 19 gallons. Fits fine, but not sure that is enough to make the range difference you are looking for. Maybe Frybrid's 26...

I don't agree - two batteries in series makes 24 volts as you say, but two 7 psi pumps in series makes 7 psi, not 14. The hope is that they will maintain that 7 psi under load better than 1 pump, meaning they are feeding more volume.

I've wondered about the quantity that gets bypassed and returned to the tank. I've never thought it was much, but also have never pulled the return line to look. I had a stock LP, then a Walbro, now a Raptor. With the Raptor my fuel pressure stays much steadier, still drops but only to...

Woody I guess the answer you are looking for is yes, 2 might do a better job than 1. I'm not convinced you need 2, but the redundancy is certainly worth the 45 bucks even if you don't see a difference from the fuel flow. I don't think you answered earlier, do you have a fuel pressure gauge?

With your parallel feed, did you need check valves so that when only 1 pump is on it doesn't feed back to the tank? Or does the pump itself act as a check valve?

Woody, do you have a fuel pressure gauge? If not, definitely add one. I'm not sure I see the reason for the 2 pumps inline. If you have enough fuel pressure, no need for a 2nd pump. If you don't, I'd rather see one capable pump than 2 inline. TD's setup in parallel makes more sense if you...