Need help with engine speed not matching RPM's after installing a new clutch -

[heptofite]

Bad fuel pump could cause that.

Bad pump = less fuel to injectors

Less fuel = engine works harder to do less

more work = higher RPM.

no, it couldn't.

it's a manual transmission, X engine rpm will always equal Y speed in Z gear, no ammount of poorly running engine will change a directly gear driven relationship of rotational speeds.

his problem is electronic.

 

[96rangerdanger]

Snafu - can you tell me where this inertia switch is?

 

[doorgunner]

you misunderstand, changing your tires size will affect your ACTUAL speed PER RPM, not your INDICATED speed PER RPM.

i'm really not sure what you thought i meant that you were correcting me for.

I'm not really sure I have any idea of what you guys don't understand about each other's statements......but I AM positive that I can't help him with the original problem...lots of good info, though......

 

[gw33gp]

Bad fuel pump could cause that.

Bad pump = less fuel to injectors

Less fuel = engine works harder to do less

more work = higher RPM.

That logic = bad science

 

[96rangerdanger]

Ok, so I bled the the clutch like 5 times and it seems my truck now runs at 77 mph at 3000RPMS. Also, I put some lucas transmission additive in my tranny. Could the clutch have been slipping at 3000rpms doing 75 mph, but not off the line?

 

[robertc1024]

I wouldn't think so. You can always try Click & Clack's clutch test. Put your front bumper on an immovable object, put it in first and slowly let the clutch out at ~1500-2000 rpm. If you kill the enginge, the clutch is good.

 

[doorgunner]

Ok, so I bled the the clutch like 5 times and it seems my truck now runs at 77 mph at 3000RPMS. Also, I put some lucas transmission additive in my tranny. Could the clutch have been slipping at 3000rpms doing 75 mph, but not off the line?

hmmmmmmmmmmm.....had a similar problem with my Harley.....clutch worked fine thru the gears......but after a few miles.....if i gave it a lot of throttle around 60 mph...the tach increased more than the speedometer....once i evened out the throttle the slightly noticeable engine revving sound went away....

the clutch was out of adjustment j-u-s-t enuff to slip at a certain speed/throttle combination after warming up......

 

[96rangerdanger]

doorgunner - That is exactly what I was thinking. That it was slipping as I applied more gas, doing 65+. I got a factory ford clutch set for my truck. It had the ford and luk stamp on it. Are these clutches adjustable? I thought they were self-adjusting?

 

[adsm08]

I wouldn't think so. You can always try Click & Clack's clutch test. Put your front bumper on an immovable object, put it in first and slowly let the clutch out at ~1500-2000 rpm. If you kill the engine, the clutch is good.

Just a side note (and I feel the need for these on anything that comes out of Click and Clack's mouths), for the purpose of this test, your house does not count as an "immovable object".