Erska

What do you guys think that what's the max RPM's I can take with my parts?

I have Hamilton diesels billet pushrods and Hamilton Diesels 110lb's springs.

I just noticed yesterday that in under short WOT run I turned 3700rpm's...

And it sounded SWEET!

Also, I don't get that P0253 code/CEL if I have my quadzilla on PL0 When I'm using the highest power level and my fuel pressure drops it comes on immediately. Could the fuel pressure(or lack of it) be the reason for this?

P0253 is:
SYMPTOM
P0253-FUEL INJECTION PUMP FUEL VALVE OPEN CIRCUIT

SET CONDITION
Engine speed > 100 RPM low current or no current detected at the Fuel Metering Valve.

POSSIBLE CAUSES

* Wiring/connector problem
* Other DTC'S
* Battery voltage below 12.0 volts
* Ground circuit open
* Fuel injection pump relay output circuit open
* Battery voltage below 8.0 volts
* Fuel injection pump -

RowJ

Only reason for running an automatic over 3200 rpm +/-, IMO, is sled pulling.... 2nd gear selected and 4x4 in 4 low.

At the racetrack (drag), my tranny shifts all gears between 3000 and 3300 rpm.
Running higher RPMs does reduce 1/4 mile times.

That being said, you should have adequate protection for up to 4000 rpm in short runs, if you want it. But wear and tear on other moving parts will increase. JMO

RJ

Erska

I was just wondering that, I did a WOT on 4x4 and I lost the traction totally because the snow. I'm just wondering why my transmission let it turn so high rpms without changing gears. Maybe it happened so quickly?

My transmission has allways changed the gears between 2900 and 3100rpms before.

Erska

I think my Airdog has lost in the mail. Because I have waited for over 2 months and I still don't have it. Darn!

But anyway, my trucks struggling might not be all the fuel psi related!

Because I tried to rev it on neutral yesterday. Everything was fine until I turned adrenaline on the third level. I have minimized the levels from 0-3. Without adrenaline or only levels 0-2 it revved up to 3500 on neutral. But when I put the top level on, it reved up to 3800 quickly but it was kinda like firing from the exhaust after 3300 and the check engine light came on immediately.

It did not do this when I lowered the pump stretch from 2200us to 1600us and the timing from 8 to 5 I think. But I'm going to do some more research on this.
I talked to a one of the best VP44 pump rebuilders in here about the P0253 code what it throws at me.

He said the chip might be giving to much timing, or stretching the fueling to long because the firing kind of sound from the exhaust.

I also tried this on drive. We have very ice roads, or in this case, parking lots and I pumped the throttle rapidly and the tires spinned, and immediately on the same second that I heard the big BANG the check engine light came on.

The check engine lights also comes on immediately if I do unboosted launch and keep the throttle to the floor more than second which isn't even enough for turbos to lighten up.

I have timing at 8degrees, pump stretch at 2200us and min fuelings are at 30 and max at 100. My tune is comp tune 2.

Is my VP44 timed incorrectly or what's the deal with this?

By the way, this pump builder said that he could put some of the bigger engine's VP44 plungers and piston and measure how much more he can get fuel out of it...

Should I consider of taking my VP44 to a service or or is there something more to do?

Maybe the VP44's original timing has changed and that why it throws the check engine light with the adrenaline? Or maybe my VP44 can't handle that much fuel?

Do you guys have any idea what's happening with my truck?

Erska

No clue? Anyone?

RowJ

I don't understand what you are saying. Do you mean from 10 to 3 power levels?

RJ

Erska

Yes. That's excatly what I'm saying.

RowJ

Remember PL00 is one of those 3 settings. If you change to only 3 power levels, all you will get is PL00, PL01 and PL02.
You need to do at least 4 power levels to get full fueling.
I personally prefer selecting 5 power levels....
1-OFF
2-Timing Only
3-Timing plus Can Bus Fueling
4-Timing plus 1/2 Max Fueling
5-Timing plus Full Fueling.

RJ

RowJ

I re-read your post and you mention PL03, so maybe you re programed for 4 settings?
I would try going back to 11 power levels and see if you still get funny results.

RJ

Erska

Yes, I got the funny results before when I had the stock software on the adrenaline with 11 power levels. I can tell because I got the CEL then as well with the same code and struggling. But I thought it would be fuel pressure related, but it is not. My Fuel pressure drops but not that much, and I got the struggling immediately and the big bangs on the neutral as well.

Oh yes, I have 4 levels, but my levels goes from 0-3. I have thought that the level 0 is one of those 4 levels.

Obben

Hi from Sweden!
Do you have the Hypertech loaded into the ECM?
Maybe the hypertech do some timing and when the adrenaline ads timing it gets too much?
I have never had that issue with the ADR and I have a similar setup.

Where in Finland do you live?
Pratar du Svenska?

Erska

Hi!
Yes I have loaded the hypertech, but I'm not using the engine tuning. I only use it for the tire size recalibration and deleting diagnostic trouble codes.

I'm just wondering that is it possible that some parts inside the VP44 might just worn out and change the original timing?

You have a quick truck! That's fast, have you dynoed it?

I live near Pori(Björneborg). I see you're living in Stockholm, my aunt is living there.
You guys are lucky to have bouldermaskin there!
And no, I don't speak svenska. I barely passed it on school. Funny because I was pretty good at english.

Obben

Yes Maybe it is the VP taking a dump. Have you ever changed it?

I have dynoed it to 442 Hp at Bouldermaskins Dyno Dynamics, wich I think is a bit low. The times on the strip says around 550 hp with some calculators, and that seems to be about right compared to trucks with similar mods and times.
But that is on the Dynojet 248 that seems to be the reference over there.

Some videos of the truck:
http://www.youtube.com/user/obben666

esde

Scary how you can see your air filter start to collapse in the video. I'd address that before something lets go and it eats the turbo.

RowJ

442 is definately low for 1/8 mile.... depending on your weight. I'd say you are closer to 600 hp than 500 hp.
I've never been under 8 sec and run 85 to 87 mph regularly.

RJ