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Old 08-30-2005, 05:28 PM   #1
HolyCrikey
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Join Date: Jul 2004
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2005 Mazda3 Hatch
Titanium Grey Metallic

Default Need help ASAP! Cobb CAI problemo

Ooook.. Story:

I had a Weapon R short ram intake for my 2002 RS. Worked fine for how long I've had the car. I get my Cobb CAI in. Put it on, fit it up, plug in all vacuum lines, etc. I then reset the ECU and wait about 4 minutes.

Car cranks and jumps in RPM to 2k. Then drops down to about 500 and then shudders badly and dies. I get a check engine light, a AT oil light (automatic).

So.

The front differential oil is a bit low, but I don't see how that'd cause my car to fart out.

MAP sensor is in place and seems to be completely ok. No lines off. Double checked.

Any idea on what I can do? Now when I try and crank the car, it won't even turn over completely. It does like a half crank and farts out.

HELP
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Old 08-30-2005, 05:51 PM   #2
Sudafed
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i have a 2002 rs with the cobb cai, but my car is 5mt. i never had this problem, nor have i heard of it before. to me it sounds like something else besides the cai. are you sure you didnt bump anything or unplug anything by accident?
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Old 08-30-2005, 07:04 PM   #3
HolyCrikey
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Welp, update. I had to tighten up the throttle cable to keep the car idling ok. So it runs now

No engine lights of any kind.

But it still feels weird. On my 4EAT, when going down a hill, it usually engine brakes a ton. However, now it won't.

I guess I'll take it to a dealership around here, but I doubt they'll help since I modded the intake. Gr.
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Old 08-31-2005, 12:54 AM   #4
HolyCrikey
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Ok, just tried the mofo again tonight.

Whenever I rev the car, the lights dim.

W T F ???

This problem is just getting more and more odd. I'll be replacing the battery in the next days to see if that remedies the problem a bit. It's old anyway. I hope it's not any ECU or alternator problem

Can anyone else add some insight?
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Old 08-31-2005, 07:40 AM   #5
Calamity Jesus
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Since you removed the battery cables to reset the ECU, double-check/clean them.. make sure you're getting a really good connection. A poor ground to the battery can make a car act very screwy.
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Old 08-31-2005, 12:59 PM   #6
wgb113
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Very weird indeed. I've had my Cobb CAI on for a few months now with ZERO problems.

Maybe take it back off and start all over?

Bill
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Old 08-31-2005, 09:13 PM   #7
jut60
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ECS swap [x]

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like beaverboy said, check you battery connections and make sure they are tight. i've had some interesting things happen when forgetting to tighten a battery terminal.
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Old 08-31-2005, 09:20 PM   #8
FalconRS
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+1 more for checking battery connections. I once disconnected the battery to reset on another car, hooked back up and it was like there was no battery in the car. Now, everytime I disconnect the battery for whatever reason I give the terminal and post a quick shot of contact cleaner, quickly clean it up with a toothbrush I keep in the car, takes 30 seconds if that, and you know your connection's always solid.
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Old 09-01-2005, 12:33 AM   #9
HolyCrikey
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Yup, double and triple checked EVERYTHING. I just hope my ECU or MAP sensor isn't borked. Battery is low on water, which will be replaced soon. But ugh... still complete weirdness.
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Old 09-02-2005, 08:37 PM   #10
HolyCrikey
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UPDATE:

Car fixed. It was the damn battery. Put in a Duralast Gold and it's smooooth.

Damn OEM battery. I wish I could blow it up.
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Old 09-02-2005, 09:34 PM   #11
piker28
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oem battery has nothing to do with it you somehow drained it enough to kill it

i have had a ton of parts, subs, hids, and horns all run from the oem and battery and it is going strong...the car even came with that same battery dead they had to jump it in front of me when i came to pick it up
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Old 09-03-2005, 03:27 AM   #12
HolyCrikey
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^^^

Welp, that's the odd thing. I know of the durability of the OEM battery depending on the user. Some have lasted 5 years or so. Mine had been drained and jumped once before. Otherwise it was doing alright, but was noticably draining near the end.

However, you can't say the oem battery had nothing to do with it. Many of people have reported the life of the oem battery being about 2-3 years, even with decent matienence. It's still a pretty weird and unknown area about how long the OEM battery really can last.

Either way, problem solved with the new one.

Furthermore, the Cobb CAI performs far better than the Weapon R short ram intake. Quite a significant difference. Sounds better at WOT too.
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Old 09-03-2005, 05:24 AM   #13
flanders
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My original battery lasted 90k. I only replaced it because I thought it would solve some problems I was having which ended up not being battery related. Something must have gotten whacked when you switched intake.
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Old 09-04-2005, 12:49 AM   #14
012.5RS
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batteries get real freaky with temp changes. i dont believe that would be it since you live in north carolina. the only other thing is how long does it sit at a time? is it a daily driver. Also you said you bought a duralast... from autozone right? if so keep the receipt you will most likely need it. Did you check the alternator too or just the battery? If they alt was bad it would drain the bat and when you put a new one in it will work for like a day or 2 or maybe more if your lucky and die again. If you got a pepboys around you they can check your charging system for you. i work at a pepboys up here in PA and in the store we got a protable bat/alt tester that can be taken out to the car then print up a slip to tell you whats going on and its free of charge.
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Old 09-04-2005, 03:24 AM   #15
HolyCrikey
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^^^^

That's a great idea actually. I'll probably do that this week.
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