detonated engine?

[gblue]

Aloha from Maui..
I was losing power again ......back to the shop. They wanted to test to see if both fuel pumps were coming on for my Paxton s/c. So they put the truck on the lift, and took it up to 5000 rpm while slightly stepping on the brakes to stimulate a driving load. The second fuel pump was not activating. We dicided to have my Split-second control modual checked.
I started driving home keeping the rpm's below 2000 and 15 mionutes later I heard a loud sqeaking and kncking under my hood. Stopped the truck, opened the hood and it sounded like it was coming from the top end of the engine. Towed it back to the shop. I'm feeling their testing blew my engine.

My question is:
What happens when you rev the heck out of a s/c engine that is being starved for fuel? And, knowing that the engine may be running lean, was this any way to test it?
They are calling me this morning with their diagnosis
Mahalo

Gregg

 

[TNVIPER]

You may or may not have damage from the testing but high RPMs and loads on a fuel starved engine will eventially damage it....can happen first time or after many times..just depends on the engine and how lean it's getting..

 

[perk_1405]

It deff. Sounds like running it like that hurt it. A data logging system would keep u from having to run it again and make things worse to find exsiting/previous problems.

 

[JTS VENOM PERFORMANCE]

Aloha from Maui..
I was losing power again ......back to the shop. They wanted to test to see if both fuel pumps were coming on for my Paxton s/c. So they put the truck on the lift, and took it up to 5000 rpm while slightly stepping on the brakes to stimulate a driving load. The second fuel pump was not activating. We dicided to have my Split-second control modual checked.
I started driving home keeping the rpm's below 2000 and 15 mionutes later I heard a loud sqeaking and kncking under my hood. Stopped the truck, opened the hood and it sounded like it was coming from the top end of the engine. Towed it back to the shop. I'm feeling their testing blew my engine.

My question is:
What happens when you rev the heck out of a s/c engine that is being starved for fuel? And, knowing that the engine may be running lean, was this any way to test it?
They are calling me this morning with their diagnosis
Mahalo

Gregg

quick 4000 mile diagnosis.
you probably spun a rod bearing or broke the ring lands on a piston.

taking it to 5000rpms on a lift with a possible fuel starvation problem isnt the smartest thing to do.

for one you should def have an air fuel guage, to read whether you are running lean or rich, a cheap insurance for only $250 and a killer diagnosis tool.
you should also have a fuel pressure guage to be able to read the fuel pressure.

if they had these two items you would have been able to see a problem.

but most likely the damage is allready done, the noise allways sounds like its on top, but if you lay under the truck most of the time you can here from where it originates.

sorry bud

 

[Prof]

I agree with Stinker.

Who installed your SC without recommending an AF meter?

Additionally, anytime you have multiple fuel pumps you must have a fuel pressure gauge. There must be a way to tell that one of the units is not functioning before you notice it on the AF meter.

This is one of the reasons I just use one fuel pump. If it fails the engine stops. Which in my mind is a much safer situation than running lean.

Can't imagine someone running a poor performing engine up to 5k without doing a lot of other investigation first...just sounds like someone was not thinking.

 

[mr. anderson]

morons! they should have been able to have done that with just electrical power and some boost pressure on the paxton FMU! and a fuel pressure gauge.

 

[DIABLO_X22]

Being A Shop Owner-If 1 Of My Guys Did This, They Would Be Unemployed!!!!! Like Stinker Said There Are Tools- We Spend A Lot Of Money On To Properly Test & Diagnose A Vehicle. I WOULD BE PISSED!!!!!!!!! Did They Do This in Front of You, Or Tell You This Procedure?????????

 

[gblue]

engine...

in front of me....

 

[FerrariTruck]

most people outside the viper world do not understand how sensitive the 3rd gen viper motor is sensitive to detonation and running lean. especially when boosted.

 

[DIABLO_X22]

DONT EVER GO BACK, NOT EVEN WITH A FORD!!!!!!!!!!!!!! WELLLLLLLL MAYBE......