car is at the tuner.... and having issues

[Frizzle86]

Alright,

I have a 00 cougar with a 3.0L from a Sable in it with SVT cams and a GMK Shorti Intake. No Headers and No exhaust.

Tuner is only getting 165HP and asked me to come over today to test drive it.

I went to take it for a test spin and it is lacking some serious torque down low (just sorta glides up to about 4.5K rpms then it all kicks in like a street bike or turbo). It almost feels as if its down a cylinder. For instance when I had the 2.5L i could let the clutch out step on the gas and it would push me slightly back into the seat and i am not experiencing this at all with the 3L.

The tuner put in new plugs, wires and gapped them smaller so i wouldn't have spark blow out and he also feels that its missing some down low torque.

Any suggestions on what it could be as we both feel its mechanical and not the tune itself.

[erfnick1]

so very low torgue at low rpm's?? First thing that comes to mind is the irc not kicking the secondiars open. have you guys checked that out. i don't remember what its called. but it is connected to the irc it measures the the air flow and it sends the signal to the irc to start opening the secondairs. ( it any one knows what it is called please post. ) But that might be going bad.

[gamiller]

What year block did you install?

What upper intake manifold is installed (e.g. 2.5L Split, 3.0L Split, 3.0L Oval)? What lower (e.g. Split or Oval)? Are you using the IMRC?

[brapple]

Originally Posted by erfnick1

so very low torgue at low rpm's?? First thing that comes to mind is the irc not kicking the secondiars open. have you guys checked that out. i don't remember what its called. but it is connected to the irc it measures the the air flow and it sends the signal to the irc to start opening the secondairs. ( it any one knows what it is called please post. ) But that might be going bad.

nope, no power below 3.5 krpm is the secondaries sticking open, not closed. if they where stuck closed you would have no power above that point. also the secondaries are controlled by rpm, not anything else. they only open when above the imrc point, where timing is also bumper up for the added air and fuel flow ....

[Frizzle86]

i am not sure of the year of the engine.

It has the plastic upper intake and every thing in the 3L is from the 3L except for the essential parts needed from the 2.5L.

The MIRC has been tuned out and there are no secondaries as its not a Hybrid build.

[fordrule]

faulty injector?

[Blackcoog]

Is your tuner adding in all the timing needed down low for the full 3L's? The full 3L's are horrible down low unless timing is added.

[Frizzle86]

No faulty or poor injectors. The tuner checked it out.


To respond to black coug. the car just kinda coast almost like i am driving my 97 Mercury Sable with the 16 valve V6 with auto trans till i get to 4.5K rpms then the car feels like a beefy 3L (sounds good too).

The Air Fuel ratio is tuned to be very drivable and its running nicely it just seems to lack that umph.

[fordrule]

next upgrade i would suggest is a better flowing exhaust and some headers and hi-flo cat

[spridget]

You need a more intelligent tuner. Your issue has nothing to do with intake or exhaust.