More engine problems, f*ck this...(video)
 

I was warming up the truck for a quick 3 mile run down to the river...decided to floorboard it once in park to clear it out after the extended idle....and it felt like it jerked, so I revved it again..and saw it went to about 2500 and stumbled..so I held it down, matted....acts like a damned rev limiter...

1995 K3500 Silverado, 454 TBI, all new sensors, FPR rebuilt, all new gaskets on top end, all new exhaust (catless y pipe into flow 40), fuel pump is new, all new ignition, timed to 4* adv...

http://s97.photobucket.com/user/RED-85-Z51/media/CAM00245_zpsc4b2febc.mp4.html

SOmetimes after i lift off after it does this, it dies..other times it recovers and idles...

Audio was Utah quality on that one.

Sounds like misfiring. What's it sound/feel like?
Scott

Here's how to fix that.

Build Your Own Truck: 2014 Chevy Silverado 2500HD | Chevrolet

yeah SMS quality vids are sub-utah quality...

I cant get my comp to connect to the phone, so I have to email videos to myself and do it that way...a 20 second video would take a week ot send..haha

It feels like valve float...like it hits s certain speed and becomes bound by how much air it can move, however 2-3 days ago I was making pulls to 4500 without any problems at all.

But at the same time it feels like a rev limiter, like its on/off/on/off/on/off/on/off but without the tach needle reacting like a rev limiter...

I also had a little smoke out the pipes when it did this...couldnt tell the color before it cleared.

Bolting on a Holley 750 Dual feed, and stand alone trans computer is looking more and more attractive all the time...

just ran it some more...it seems to only do it at or about WOT...if I dont go down that far, it revs okay.

Ive got no SES lights illuminated...but...Im thinking maybe TPS..?

He'd be better off with the radiator cap solution :D

I priced out a new 2500 4X4..reg cab, long be,d Diesel...only 49,990....

Damn hard to tell. Looks like you recently replaced most of my first guesses.
Even with the smoke, I would lean toward an electric issue vs fuel delivery.

Only other thought is map sensor although you said all sensors were replaced.

With that mis-fire type of behavior, it is often something in the distributor/coil or as simple as fouled plugs.

Will be interesting to see what you find.
I never cared for throttle body carbs. Give me a straight venturi style carb or injected. There's a reason that sheit didn't last but for a couple years.

You sure the fuel pressure regulator was rebuilt properly?

Scott

Yeah for 2WD. Would love to be able to get away with that. Soooo much less sheit to maintain and the buy cost is a lot cheaper.
Scott

FPR is dead nuts simple. 4 screws and a diaphragm....

I swapped the MAP from my 95 K1500 oer to it and it did the same thing.

if i go out and drive it...If i go down about 3/4...it pulls fine..if I go beyond that..it kicks and bucks nasty.

If it was a FPR or fuel supply problem, it would not likely do it in park..mainly under a load when fuel supply is greater...

All the iginition is new..plugs, wires, coil, module, cap, rotor button, etc...

Ive got a new IAC valve, and CTS coming for it...ill go ahead and order a TPS now...its only money right?

Jsut swapped in the stock ECM and EPROM...no change.

Valve spring

Well, it revs up to the redline if I dont floor it. I had 2 broken springs on a 350 one time and if I got over 2000 at all it spit back out the carb bad.

$50k for a truck?

:willy:

What's wrong with people today? My first house cost less than that.

:funny:

A 2014 Silverado 1/2 ton, Reg cab, short bed, Z71, base cloth interior, 5.3V8, base 17" wheels, base tires, no towing group, is right at 38K. long bed, ex cab, 18's,....all add $$.

A 2014 2500 Duramax, Z71, 4X4, base wheels, tires, towing group w/o brake controller, chrome package, reg cab long bed, base cloth interior...was a few dollars shy of 50K. About 54K if you add on longer wheelbase stuff, leather, etc...

A 3500?,,, i didnt look but based on what i saw...load out a Dually, Diesel...around 60,000...

My diesel has 125K miles on it 4X4, will pull anything that the hitch is rated for...gets a hair over 18mpg, dead nuts reliable..looks great, cold air...hot heat, I have under 4000 invested in it.

My K1500 Z71, loks okay (needs paint), runs like a boss...comfortable, cold air, hot heat, good tunes, can tow 3500-4000lbs, 33" tires, gets about 17mpg, its no slouch unloaded though. Gets looks because they are rare to find CLEAN...and people liked em...its 20 years old this year after all. I have about 4100 in it, and its never left me stranded or in trouble, and ive put about 10K miles on it, almost always pulling a trailer...or something...

If I can get this 1 ton SRW to work right, it will be a great workhorse...Love them big blocks.