That sounds more like an HPOP than injectors to me. Do you have ANOTHER tank on that truck?

What is the lifting unit he replaced?

 

I need a fuel tank/generator just like the one on that stove...if anybody happens to come across one, please lemme know

 

Steve,

There are two different series of two-burner stoves, the 413s and the 425s. At first glance they look the same, but one is slightly larger than the other and the generators are longer.

Look on your stove and get us the model number to be sure of getting the right one.

Pop

 

It's a 413D. Pretty common stove from what I've seen.

 

Oops...scratch that...it's a 425D

 

What do you mean by "another tank"? I just have the 40 gallon rear mounted tank that replaced the old one. Also, is the lifting unit also called the sending unit? The thing that was replaced was what goes into the 6 inch hole mounted on the top of the tank that the fuel comes out of en route to the fuel pump.

I'll try driving the truck today and provide an update.

 

I'll keep my eyes open for one.

Probably the best bet is to find a really toasted 425 that somebody has burnt up good, and salvage the tank. The tanks are far more hardy than the stoves.

Found one for $5 on Craigslist, but it's in Murrieta.....
http://inlandempire.craigslist.org/spo/3395452760.html

Though the description says "old", it's the newest-style tank with the "safety" location of the filler.

Of course, it could be a late-model 413, too.

The length of the 425 generator, from orifice tip to far-side of **** is over-all 10-3/4 inches. The 413 will be longer.

Pop

 

A lift pump is the fuel pump, which pulls fuel from the tank. The sending unit is the fuel gauge float assembly, which is part of the fuel pickup assembly inside the tank. On a 7.3 or 6.0, the lift pump and the sending units are different things in different locations.

I think Trey was wondering how clean the tank is. Your pickup assembly could be plugged with stuff, limiting the flow of fuel. Especially if it is that steel tank that Ford used on C&C trucks.

I should add that, the term lift pump is technically not correct for these engines. A lift pump "lifts" the fuel to the primary fuel pump, usually an injector pump. But our engines don't have injector pumps, or any secondary fuel pump for that matter. But lift pump is still used generically by some for any diesel fuel pump.

All of this likely has nothing to do with a cold starting problem.

 

Bill,

Thank you.

Looking back at the receipt, the sending unit is what was replaced. The "Hutch" mod was done at the same time as the new fuel tank was installed, fuel pump was replaced, and fuel bowl rebuilt. A pre pump filter (Baldwin BF1212) was also installed.

Given that all that stuff is relatively new, and that I would expect a clog to be a problem both when the truck is cold and when the truck is warmed up, I'm guessing there's no obstruction before the fuel pump. The truck drives fine after it warms up.

As an update, the truck started this morning after only two tries. However, after letting it warm up for 60 seconds, I put it in gear and (1) still had the sputtering problem (which I think is called "missing"); and (2) got very little power when I stepped on the accelerator pedal. Oddly, it seemed like I was getting RPM, just no power (what I would like to call - in my novice opinion - no compression).

i kept the truck on the road for about five minutes and the problem, as it always seems to, went away.

Another question - if injectors were bad, wouldn't they be bad all the time - not just when the truck starts.

Second question, even if three injectors are bad, shouldn't the truck start fine if the other five are OK?

Finally, should I seek out someone with a scanner to "pull codes"?

I'm out of town starting tomorrow mid day but will monitor the forums off and on.

Thanks to all for their advice.

 

I'm still sold on a weak HPOP. Your injectors are fired by highly pressurized oil. HPOP stands for high pressure oil pump. As oil warms up it becomes less viscous and therefor easier to pump. If your HPOP is wearing out it could be having a hard time with that oil. Are you running 15-40? A simply way to test this is to use 5-40 oil such as Shell Rotella T. This oil is thinner when cold, but the same weight at operating temperature. As the 15-40.

Concurrently, a weak LPOP (low pressure oil pump) could have the same effect but might be less noticed. I would put money on the HPOP first.

Getting hooked up to a scanner would be great. There is a member in Oxnard who owes me a favor I could call in for you. He has an AE and could help. Likewise any of the other members here with an AE would be glad to help in sure. The AE will be able to give a live read out of HPOP oil pressure so you can see if that's the problem. Also the added benifit of any lingering secret codes.

 

I'm not experienced with the 7.3, and would defer to Trey's opinions. And at the same time, with my limited knowledge, agree with him that your problem is either high pressure oil, or a weak IDM that isn't fully energizing the injectors. Those are quite similar to the problems that can cause cold start issues on a 6.0. A little down the list of likelyhood is one or more weak injectors. You'll need a cold start contribution test to determine that.

Unlikely to be a fuel supply issue. Unlikely to be a low pressure oil problem.

 

Trey,

I will take you up on your suggestion when I get back.

Any thoughts on my questions in the prior post? Additionally, it seems like the Bosch HPOP runs about $500 from RiffRaff Diesel. Is there anything else I should replace while this repair is done? Is the repair something you think I could tackle?

Off topic, I recently installed the Schraeder valve on the fuel bowl to test fuel pressure. When I see you next, I may ask to hook up the fuel pressure guage you mentioned when I saw you last unless I buy my own guage befor then.

Thanks again to all.

David

 

David, if you're around the HB area with your truck some time next Friday and we can work it out, I'd be happy to hook it up to the AE on my laptop and see if we can find anything. I'll be tied up Monday through Thursday.


How's the new job going, Bill?

 

Busy busy busy! Little time for FTE anymore. How about you? Are you working Monday thru Thursday?

 

Steve,

Thank you.

I'll be back next Sunday so I'll send you a message to see about another time if that would be OK. Funny thing is that although I live in Studio City, I've been commuting to HB for the last five weeks.

David