Had my intake manifold replaced not too long ago. Noticed a loss of torque and power going up hill. I also noticed that the RPMs go up higher, but the car doesn't feel like it's going any faster. Could there have been a loss of compression due to the swap of manifolds? Also, was there need for adjustments to the car's computer due to the change? I took it to a non dealer auto shop, so I'm not sure if that would have made a difference, other than the difference in cost for the repair.
2007-01-06 13:31:14 · 5 answers · asked by alter_ego 2 in Cars & Transportation ➔ Car Makes ➔ Ford
Great answer Carlos. . . . However you might find this a little more helpful
Is there a "Check Engine" or "Service Engine" light on? If so have the code checked and that could solve your problem. Also if there is a light on wherever the work was done if you take it back it should be under warranty.
Assuming that the manifold was replaced with a stock manifold, it sounds like there might be a vacuum leak. When the manifold was replaced they should have used new gaskets, if they didnt its possible one could have torn when they removed the old parts.
2007-01-06 14:23:00 · answer #1 · answered by Smarty Pants 3 · 0⤊ 2⤋
I'm not sure what manifold you used. but i assume you mean u put on a cold air kit because there only two aftermarket manifolds for the 4.6L that i can think of the Bullit manifold and the Typhoo manifold
If you mean an intake it could be a leak somewhere or the computer is adjusting to the changes. i recommend u disconnect the battery this will reset the computer (leave it disconnected for like 5 Min's or so) and it will relearn how u drive this may fix it.
Just because you put on an intake doesn't mean u will get tons more power intakes usually don't give you more that 4-5 hp tops its more or less for throttle response than anything. it makes a bigger difference when combined with other mods such as ported heads, supercharger, full exhaust, etc..
2007-01-07 06:51:03 · answer #2 · answered by XC220 3 · 0⤊ 1⤋
You may have a vacuum leek . the rpm going up may be due to a throtle linkage adjustment to the trans or possibly a vacuum leek.. You didn't say if performance manifold was installed. also check the trans. fluid. if low it wont shift right or hold the pressures needed for the trans. to operate properly.
Is the trans auto or manual? if manual the clutch could be slipping. And oftin a burnt odor is present. a 99 mod. probably has a limited clutch wear that does often shows up rather suddenly and not progressivly as in older cars.
2007-01-06 21:45:26 · answer #3 · answered by Robert F 7 · 0⤊ 0⤋
I personally like Mustangs, but unfortunately don't have much knowledge about them. Go to yahoo.com and type in "Mustang Forum" and go visit one of those Mustang forums and register with the forum you like and share your problems and stories with them. They may share your problems and could probably help you the best since mostly all members have your type of car. I'm sure you'll find beyond help there.Car forums are a small community of people that share your interest with that car. Good luck
2007-01-06 21:54:21 · answer #4 · answered by Carlos M 2 · 0⤊ 2⤋
Bigger manifold less low end torque.Dealers spent millions to make it run good and then................
2007-01-06 21:36:08 · answer #5 · answered by (A) 7 · 0⤊ 1⤋