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car randomly sputters when stopped...help plz

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Old Oct 9, 2006 | 01:47 PM
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Default car randomly sputters when stopped...help plz

over the last 3 days my car has almost turned off twice while im stopped at a red light. any one have an iddea of what it might be? CAI was installed like 7 months ago when i got the car so i dunno if its the MAF. my mods are CAI, ZPI s pipe and exhaust, NST pulley, and Unichip e-manage. any ideas?
Old Oct 9, 2006 | 01:51 PM
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I had this problem. My car would randomlu sputter and it got SEVERELY WORSE to the point where i had to reset my battery everytime i want to drive. Take off the intake. Trust me it will cause more problems in the future. The dealer could never find any solution to this, the MAF was good and so was the intake.
Old Oct 9, 2006 | 01:55 PM
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lol noooooo i like my whistleee. any diff if its short ram?
Old Oct 9, 2006 | 02:11 PM
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Not that I know of. At one point when i tried starting my car all i got was all fuel and no air mixture. It was just burning fuel trying to start up. Id suggest you give it a little bit more time. If it starts acting up, CARRY a 10mm to reset ur battery lmaooo. If it gets to a point where you cant start the car, Yank the Intake.
Old Oct 9, 2006 | 02:15 PM
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lol already carry one. i installed the CAI at the parking garage at work. was raining and couldnt wait to get that sucker on lol.
Old Oct 9, 2006 | 02:17 PM
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Lol. yea I do must admit the CAI sounds frakkiiinnn awesome. But after my problems which happened only after 2 months or so, I got rid of it sold it ( worked fine for the other guy) and got Booosted
Old Oct 9, 2006 | 04:30 PM
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1) Which intake? I doubt it's the intake doing it, unless it's a cheapy or one that changes the airflow diameter of the MAF housing from stock. Injen does NOT do this, but I suspect AEM might, as well as some ebay brands.

The tube sizing needs to be identical to stock to ensure proper MAF measurement. Otherwise, the calibrations are off, and it's not something that can be adjusted for.

2) Possible bad seating of O2 sensor in s-pipe. Extremely common problem, and something I fought with. When it fell out of the bung entirely (lol), car ran like poop, AND had an exhaust leak.

3) Unichip settings might be off. Who tuned it? Can Unichip do partial-throttle maps? If not, do you have it on constantly?

You might have a conflict at the ECU there.



edit-

Also check your vacuum lines. Come to think of it, it sounds like a leak. Be sure you didn't disconnect the assembly when you removed it from the stock intake housing, or that engine torquing hasn't pulled off one of the lines. This'd likely throw a CEL though.
Old Oct 9, 2006 | 04:33 PM
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Originally Posted by senseiturtle
1) Which intake? I doubt it's the intake doing it, unless it's a cheapy or one that changes the airflow diameter of the MAF housing from stock. Injen does NOT do this, but I suspect AEM might, as well as some ebay brands.

The tube sizing needs to be identical to stock to ensure proper MAF measurement. Otherwise, the calibrations are off, and it's not something that can be adjusted for.

2) Possible bad seating of O2 sensor in s-pipe. Extremely common problem, and something I fought with. When it fell out of the bung entirely (lol), car ran like poop, AND had an exhaust leak.

3) Unichip settings might be off. Who tuned it? Can Unichip do partial-throttle maps? If not, do you have it on constantly?

You might have a conflict at the ECU there.
If this is anything like mine, then its just a freak incident. I had a Injen intake only, no unichip or anything.

All O2 sensors checked out, it was the combination of intake with my car, it was not my car or the intake that caused it. Again something freak lmaoo
Old Oct 9, 2006 | 04:37 PM
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I had a little bit of rough idle, but the installation of the NST pulley took care of that.

Strange, but very true.
Old Oct 9, 2006 | 10:24 PM
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i havent tuned the unichip as of yet. im running one of the pre mapped programs. im waiting to get the headers before i tune it. as for the CAI im using the Injen. i may try to do the short ram tom just for fun since im off work.
Old Oct 9, 2006 | 11:57 PM
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Originally Posted by hiram
i havent tuned the unichip as of yet. im running one of the pre mapped programs. im waiting to get the headers before i tune it. as for the CAI im using the Injen. i may try to do the short ram tom just for fun since im off work.
This may be your problem.

I'd disconnect it for the time being... Let the ECU run on it's own before you have the chance to actually improve upon it.

Proper tuning is specific to location, mods, and individual cars. What might work on your car, at your elevation, with your mods might be totally wrong for an identical car across the country.

Switching to short ram won't help your problem, but whatever floats your boat
Old Oct 10, 2006 | 12:07 AM
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Default Re: car randomly sputters when stopped...help plz

Originally Posted by hiram
over the last 3 days my car has almost turned off twice while im stopped at a red light. any one have an iddea of what it might be? CAI was installed like 7 months ago when i got the car so i dunno if its the MAF. my mods are CAI, ZPI s pipe and exhaust, NST pulley, and Unichip e-manage. any ideas?
Which one u have, Unichip or E-manage?
Old Oct 10, 2006 | 12:26 AM
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unichip, ive been running it for quite some months now tho no problems
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