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Old 05-07-2012, 07:10 PM   #1
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Car wont idle, backfires, no power

Just as sad as the title sounds. I swapped in autolite 103s and made my own CAI. It consisted of basically removing the crappy PZEV air box and putting a K and N type conical filter on the end of the HFM tube. It's gotta be something dumb. It was bad enough I couldnt drive it home tonight. Ideas?


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Old 05-07-2012, 07:53 PM   #2
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did you unplug the MAF sensor at all? leave a clamp loose?

OK well since its back firing its definitely too lean. I suspect a vacuum leak.
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Old 05-07-2012, 10:25 PM   #3
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If its a clamp loose, he'd run rich and it would just die. I've experienced this.

His issue maybe going to be a vacuum leak. Check to make sure both lines connected to the intake tube is well connected. Also check all lines and the single electrical connector on the passenger side firewall. It's above the alternator. That part is related to your fuel system

Like mike said, did you mess with the MAF/IAT sensor at all? Check to see if you some how installed it backwards

Pictures will help. Please post of you DIY intake



Edit

I've seen you stated u changed plugs. What's the gap set to? Did you make sure the coils are bolted down? Are the clips secured to the coils?
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Old 05-07-2012, 10:32 PM   #4
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lol re-read my post..... clamp loose = unmetered air = lean. If I wasn't specific, I meant a loose intake clamp post MAF. It doesn't run anyway though. And it is related to what he just did.

x2 on posting the intake setup. Didn't see you say it but better not be any spectre tubing. the filter is ok.

I imagine its a real backfire too, into the intake system. That's pretty much always from a lean condition.
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Old 05-08-2012, 07:02 AM   #5
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This:
http://www.ineedawebsite.com/Blazing...lth%20CAI.html
is basically what I did. I double checked connections, seals, all the obvious stuff, still does the same thing. Only thing I can figure is cause its a dam PZEV the operating parameters are so tight it doesn't know what to do with all the air flow...

Edit:
Spark plug gap set to .050 with 103s, swapped in AP104s that were in it (and worked fine) and still doing the same thing, don't think this is contributing.
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Old 05-08-2012, 07:18 AM   #6
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How much oil was on the K&N (if any was used)? Just a thought and a quick check here. On my old Mustang, every time i changed the K&N or cleaned it, the oil would contaminate the MAF sensor (no matter how little I seemed to use) causing misfires, cutting out during accel, and random back-fires. Once I wiped the filter down with a paper towel and removed and cleaned the MAF, it would run fine. Just a thought..
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Old 05-08-2012, 07:29 AM   #7
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this might be a stupid answer but o well, did you disconnect the battery for like 10 mins after installing the cai? if not do the so the computer resets and will have to to do the relearn with your cai and the air intake, and make sure the maf sensor is pluged in and clean
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Old 05-08-2012, 07:47 AM   #8
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Looks like tr MAF is located before the air box. Make sure the air box is sealed tight and there is NO way for unmetered air to enter
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Old 05-08-2012, 07:52 AM   #9
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Is the maf facing the right direction?

If the maf wasn't connected you would have a check engine light...
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Old 05-08-2012, 07:54 AM   #10
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Quote:
Originally Posted by superfordzx3 View Post
How much oil was on the K&N (if any was used)? Just a thought and a quick check here. On my old Mustang, every time i changed the K&N or cleaned it, the oil would contaminate the MAF sensor (no matter how little I seemed to use) causing misfires, cutting out during accel, and random back-fires. Once I wiped the filter down with a paper towel and removed and cleaned the MAF, it would run fine. Just a thought..
Filter was on a 5 series BMW, I had installed it previously on my car with a 3" elbow but I was getting lean faults due to too much air flow pass the meter

Quote:
Originally Posted by matz2453 View Post
this might be a stupid answer but o well, did you disconnect the battery for like 10 mins after installing the cai? if not do the so the computer resets and will have to to do the relearn with your cai and the air intake, and make sure the maf sensor is pluged in and clean
Legitimate answer, yes I did this.

Quote:
Originally Posted by Slammed_2.0 View Post
Looks like tr MAF is located before the air box. Make sure the air box is sealed tight and there is NO way for unmetered air to enter
What looks like an air box is actually a silencer. It has a 90 degree turn in it to go to the throttle body. The actual air box is a huge p.o.s. that goes behind the LF bumper and takes up all the space behind the inner fender. Yes I made sure it was air tight and no unmetered air was getting through.

Thanks for all the input. I'm trying to get a hold of Tom since he knows a lot about the computers. If anyone who has had success with a CAI or SRI on a PZEV vehicle could chime it I would really appreciate it.
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