3500 RPM Powerband? (1 Viewer)

[ShawnTRD]

If I have the gas pushed in just enough to keep the tranny from upshifting, at 3500 RPM the LC launches like a turbo just kicked in. It puts you back in you seat and the wife says what are you doing. But before the 3500 RPM mark it's pretty doggy. I think the problem is pre 3500 RPM power. Any idea what could be causing power low end power?

 

[donutfj80]

Same problem here, about 2500rpm for me.

 

[jonheld]

Have a look at your EGR system.
http://www.sdsysdesign.com/tlc/images/Strife/3FE TuneUp.pdf
Read #10.

 

[donutfj80]

Have a look at your EGR system.
http://www.sdsysdesign.com/tlc/images/Strife/3FE TuneUp.pdf
Read #10.

No EGR on mine.

 

[jonheld]

Well, if you molested your EGR system I would look into what was done.

 

[donutfj80]

Jon, I had the same problem before and after EGR removal.

 

[jonheld]

What tends to happen on older trucks is the diaphragms inside the regulator and modulator disintegrate and plug up vacuum lines throughout the system. They foul the 3 VSV valves and their associated lines as well.
While your EGR system may have been bypased, you could have masked the problem. I would spend some time going through all the hard lines and make sure they're clear of debris.

 

[Toyo Boyo]

Could be something to do with going from closed to open loop on the fuel ratio.

One of the turbo guys posted a graph of his air/fuel ratio and at about those kind of rpm's his fuel ratio looked like it had dropped off a cliff - it went very rich.

Can't remember the thread it was posted though.

 

[Tapage]

I feel that in wife 80 arount 3K rpm .. under that it's just normal ..

 

[ShawnTRD]

I feel that without mashing the gas under 3500 is really doggy.

 

[lndcruz]

Correct me if I'm wrong, but isn't that just the power band? 275Ft-Lb @3000rpm and 212hp @4600rpm

 

[Tapage]

Correct me if I'm wrong, but isn't that just the power band? 275Ft-Lb @3000rpm and 212hp @4600rpm

you are complete right ..

 

[ShawnTRD]

well mine is at 3500 RPM's then. I'll try to take some video of it tonight.

 

[ShawnTRD]

Ok update.

Seems the power will kick in anytime over about 3000 RPM's. And this past weekend it was running great. I had smooth power all the way up the RPM's. It was a rainy wet weekend in the mid 50's.

 

[xoemor]

I have the same proble. i dont know what to do!

 

[ShawnTRD]

Mine seems to have fixed it's self. Do yo drive the LC often?

 

[xoemor]

1994 LC 1FZ-FE. i cannot find the reazon of this power lost!