power hesitation after 3000 rpm

[sick svt]

hello my svt falls flat on its face durring acceleration after 3000 rpms and takes about 7 to 10 sec to reach 7000 rpms with power up and down through out the acceleration after 3000 rpm only please help me and my car.. thank you .mike...

[beyondloadedSE]

Your IMRC is probably shot. Check out CEG from now on.

http://www.contour.org/FAQ/FAQ.php?s=probs&displayid=27

[sick svt]

would the imrc cause it to be not all the time but say if you were to keep the car at 3500 rpm for approx 30 sec than put the peddle to the metal and complete hesitation.if you were to turn off the ignition and back on it goes away but will come back intermitent

[beyondloadedSE]

Originally Posted by sick svt

would the imrc cause it to be not all the time but say if you were to keep the car at 3500 rpm for approx 30 sec than put the peddle to the metal and complete hesitation.if you were to turn off the ignition and back on it goes away but will come back intermitent

It is possible for the IMRC to be intermittent. Open up your hood and rev the engine from the throttle body. If the IMRC is working, you should see the secondary linkage move when the revs reach 3750 RPMs. In case you dont know where the linkage is, its located under the throttle body, attached to the lower intake manifold.

[sick svt]

Thank you, i'll deffinetly check that out, by the way my car is a 98 w 70,014 miles on it it's been doing this sence about 58,000 miles and ford couldnt find the problem they said there is nothing wrong..Thank you for your time i'll keep in touch..Mike

[beyondloadedSE]

any update on the IMRC?

[sick svt]

it seams to be working but i only see the linkege move at about 6,000 rpms is that normal.. what would happen if you were to open the imrc up and move the gears inside. thanks.Mike..

[sick svt]

another thing my car has sent a code i looked it up it was left bank catalyst i re set my computer and hasent come on for about 6,000 miles. could it be a bad cat.

[Jason43]

The IMRC should open around 3500-4000 rpm. What was the actual code you got?

[sick svt]

I cant remember it's been a while but i deffinetly looked it up and it was catalyst left bank the auto parts store said they would start with the o2 senser than the cat but i cleared the code and has'nt come on sence.Does the car have to be a certain temp before the imrc kicks in..

[beyondloadedSE]

Originally Posted by sick svt

it seams to be working but i only see the linkege move at about 6,000 rpms is that normal.. what would happen if you were to open the imrc up and move the gears inside. thanks.Mike..

No. Like I said earlier, the IMRC causes the secondaries to open at 3750 RPM's all the time. Sounds like your IMRC is having intermittent problems.

[Jason43]

Temp shouldn't matter. Are you sure its opening at 6k, as in you can actually watch the tack? You may also want to double check that the linkage on the secondaries themselves are still attached. They are known to come undone, the IMRC will still work, but the secondaries wont actually be opening.

I suppose a clogged cat could make the car stumble at high rpms. Hopefully it's not that since the left and right cats(aka pre-cats) aren't a cheap or easy fix.

[beyondloadedSE]

Originally Posted by Jason43

Temp shouldn't matter. Are you sure its opening at 6k, as in you can actually watch the tack? You may also want to double check that the linkage on the secondaries themselves are still attached. They are known to come undone, the IMRC will still work, but the secondaries wont actually be opening.

I suppose a clogged cat could make the car stumble at high rpms. Hopefully it's not that since the left and right cats(aka pre-cats) aren't a cheap or easy fix.

A clogged cat will definetely hold you back, but I agree with Jason, make sure someone is in the car watching the tach. When my main cat on my 96 SE clogged back when it was naturally aspirated, it took me a whopping 16 seconds to get from 0-60. It was terrible! Power was smooth, but it just took forever. After I got it fixed, it felt like I was driving a sports car....it was all psychological of course.

[sick svt]

the imrc does seam to be intermitant, i had my wife in the car and at 4,000 rpms i had the cover off and the gears were not moving in side then i gave it wide open thoddle and the moved at about 5,500 rpm but cut out instantly than i moved the gears till they had no play and it opened at 3,800 rpms but is still intermitant.My car sometimes does seam like it takes 17 sec to get to 60 mph,(stk honda civic can beat me when it acts up) butt not all the time did yours fill sluggish all the time w/ bad cat,or intermit. how much is the imrc,and is it dealer item only.Thanks for your help w this

[beyondloadedSE]

Originally Posted by sick svt

the imrc does seam to be intermitant, i had my wife in the car and at 4,000 rpms i had the cover off and the gears were not moving in side then i gave it wide open thoddle and the moved at about 5,500 rpm but cut out instantly than i moved the gears till they had no play and it opened at 3,800 rpms but is still intermitant.My car sometimes does seam like it takes 17 sec to get to 60 mph,(stk honda civic can beat me when it acts up) butt not all the time did yours fill sluggish all the time w/ bad cat,or intermit. how much is the imrc,and is it dealer item only.Thanks for your help w this

When I had a bad cat, it had plenty of tq off the line, but once it got into the upper RPM's, it took forever. IMRC is about $150 part from the dealership only. You probably can get a used one on the classifieds on CEG.