Ever since I installed my Injen CAI my car has been incredibly slow off the line...

Barely able to chirp tires... and many times, when I (or the ecu) shifts into 2nd from 1st at WOT... the RPM's drop signifcantly lower then they should... below VTEC even.


What is this?

Is it related to the Intake or is something else going on?


Never had this problem on the red CLS with the X CAI. So I'm assuming its not related to the intake... but... then again... it started happening the day I put the fucker in.


Yes, I disconnected battery for 30min after installing intake.

 

I am feeling the same thing no throtle response at low rpm, my CLS feels like a slug.

However, the only think I can think of:

1) I have 5k miles on Mobil 1, time for an oil/filter change
2) I have 30k miles on my ATF, time for an ATF oil change
3) I have 15k miles on the Injen Cone Filter.. time for a clean up and a re-oil.
4) I have 5k miles on snow tires, time for a 4 tires rotation
5) I have 30k miles, time for 2 Air Cabin Filters change

Did I miss something?

BTW, It could be the weather and the winter GAS....

 

 

I switched to Mobil1 at bout 7500... im at 10k now.

Maybe thats it

 

nashua, what r u talking about?

 

Could it be those 19's you're pimpin??

Which came first?

 

30K miles is hitting big time

 

glad you said it... feel like I have to move this post to ramblings now

blah... blah... blah...

 

I live in NY MANG!

The 19"s came off like 2 months ago.


My car was faster on the 19"s then it is now. :'(

 

then you should be able to spin the tires without much effort...something is up :sqnteek:

 

and yes, my IMRC Actuator is working. so again

 

Have some Fuel injector cleaner fluid dumped on your next gas fill up... See what happens.

And borrow some Gtech Pro.... for a test run.

 

are you using 10w or 5w?

 

I have the Injen CAI and I can definitely spin the tires off the line. I think there may be something else going on because I've got nothing but more power from mine.

 

5w30

 

Wow, i don't have clue in that case. My car didn't rev as well with the 10w so went back to the 5w and it was fine. In your situation i don't have a clue. It maybe the pumpgas with the oxgen is killing the power?

 

I regularly run Mobil 93 Octane...

In the past few weeks I've tried Hess 93 Octane and Sunoco 94 as well as Shell.


none of them do shit for me.

 

You need more stickers. Preferably large and yellow ones.

 

try castro 5w50

my car is pulling hard after i use them..give it a try if you want

 

Last weekend I had the CL-S out with my g/f. We were playing around on Rt23. From three different times at three different stop lights where the spped limit goes from 0 - 65 I stood on three ways. Once with VSA on, no chirp. Without VSA big spin, without VSA and brake tirque, I almost spun the fronts off from 3,000RPM.

 

Phooey, stupid time limit on editing!

 

I had the same feeling a while back, and ran some fuel injector cleaner thru it. It seemed to help a lot. I think our cars are very sensitive (relative to my old ford truck) to dirty fuel injectors.

 

Soopa, it may be MAF related. Is there a possibility for your MAF to have been misaligned or mispositioned or even damaged?

Also, a freer breathing CAI will affect low rpm negatively but it sounds very signigicant from what you are describing. Can you switch back to the OEM piece and test the car?

 

Running the same CAI, without the bypass. I've got all the punch and pull I ever had.

 

my bypass isn't installed. its just sitting in a box... so that aint it.

what is a MAF?


i guess I'll try the fuel injector cleaner.

 

MAF= Mass Air Sensor

It senses how much air is coming in from the intake and it sends that signal to the ECU which uses it calculate how much fuel it should order the injectors to spray, taking into consideration load and other variables, etc, etc.

The MAF is usually sitting right next to the airfilter when it is in its stock form. There should be a plug with wires that attaches to the MAS by the intake somewhere.

 

Same here. My car is similar to Soopa's b/c I'm at 11k miles and changed to Mobil1 5w30 at 5000. I use Sunoco 93 in my car. The reason I wrote all of that is b/c I think it's just another sign that something else is up....

 

Significant loss of torque at low rpm cannot be the result of you switching to M1 5-30 at 5000 miles. Something else is up and it sounds like tuning related.

 

Oh, I agree with you Mr. Bean.

 

What about a vacuum leak? I would check all the hoses around the CAI and it's connections. You may have knock somehting loose or forgot to conect something back up. Click on the sticker link in my sig. There are some close up shots of my CAI install. Maybe you can find something out of place.

 

I'm not having any problems with my car. It pulls harder with the CAI. I was just saying that my car has had the same (or similar) oil changes and gas as Soopa's and I was not having a problem which meant his most likely wasn't related to the CAI....

 

Wouldn't make a difference as it is closed anyway off the line...

 

As mentioned numerous times before, we DO NOT have a MAF. Our PCM uses a speed density measurement based mostly on the MAP and IAT readings, there is no mass air flow measurement occuring!!

By determining the manifold pressure and air temperature the PCM can determine the amount of air in this closed system and add the appropriate amount of fuel.

Secondly, vehicles which have a MAF it is unlikely they would be misaligned, damaged is a possibility but codes are set very quickly if this is the case.

 

The area of a car feeling faster or slower can be deceiving in many cases. In addition, a bad tank of gas can cause similar problems. The only way to know for sure is to do some runs or dyno pulls, but that isn't always convenient.

How is the car idling?? If it is unstable then there is a chance of a vacuum leak but this isn't always power robbing (at least not from the engine).

Is there a noticeable change in the pull when you pass 4k revs?? Highly unlikely but the IMRC plates could get stuck Open.

What is the current stall speed at?? The TC could be acting up but again, unlikely.

I'd be interested to see what the spark advance is at...

In the end there are possibilities but another external possibility may be that it is an illusion. The spinning the wheels part can vary on road surfaces tremendously.

 

Wow. Interesting.

What is a MPA and an IAT?

 

My friend works at a car dealership, and he recieved a service bulliten that said BP (formerly Amaco) had a batch of bad gas. He said there is too much oil in it and that it would make cars run like shit. I don't know if that is the problem, but it is a possibility????

 

MAP = Manifold Absolute Pressure
IAT = Intake Air Temperature

There are endless debates over whether MAF is better than speed density. On one hand the MAF is many times considered to be more accurate (particularly when dealing with Karmann Vortex style meters).

But there is less restriction, more power potential, with a speed density system since there are no components in the flow path.

 

I dunno... all i know that i haven't gotten an oil change in a while and i have 31000 mi and my wheels are getting bald from spinning them too much...

 

Wow Scalbert! I am learning here. Interesting. I thought all cars had a MAF these days. But I can see why a MAF can be considered as a restriction. That honeycomb aparatus restricts like 40% of the size of the intake at the point where the MAF resides in that intake. I remember the one from my 96 Talon. And the reason I do is because I installed a Weapon R intake in that car. Since I have not touched my CLS, I assumed a MAF was there somewhere.

So by knowing about the Manifold Pressure and the Intake Air Temperature, the ECU can determine how much air is entering. Hmmm... Interesting.

 

I know what you mean, we had a '96 GS-T (with just the 3000GT FIPK, Bushur Upper IC Piping and the bleeder restrictor removed) back then (and a '91 TSI AWD years before that). The debate over removing the bottom screen... Also, the HKS VPC that many DSM racers use is basically a small computer which actually uses speed density calculations and then would output a signal to the ECU similar to what the MAF would send. This allowed people to remove the restrictive MAF body and also run with a BOV dumping to atmosphere (can't do that with the MAF as the ECU had already counted that air).

My old Typhoon used a speed density system, along with a few other vehicles in the early nineties. But I believe GM and most other manufacturers have gone to a MAF system while Honda still uses speed density.

Which is better could probably be debated endlessly, but if a MAF is supposed to be more accurate, why does Honda continue to build some of the cleanest burning engines out there. More power to Honda I guess to allow less restriction, free power, while keeping the A/F at stoich in a speed density system.