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Old 11-26-2013, 01:48 AM   #1
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Default '99 MAF circuit high/low...

Back story- Had to relocate MAF a few months ago, cut and soldered wires cleanly with good joints.. Back pinned each connection and tested wires from connector past the first solder joint. All is good.


Car started running REALLY poorly about a week ago and had no power. Feels like it's loading up under 1800rpms, but still feels down on power once you get past 1800. I got stuck in the middle of an intersection because the car would not budge... light throttle, heavy throttle, then it decided to run okay again for a bit. Parked it started swapping sensors with a buddy to no avail. Wideband shows stoich on idle(still feels like it's loading up). Now the car won't start with the MAF plugged in and I'm getting p102 and p103....Retested wires(from pin(s) on MAF connector past the solder joints, twice.. still good! Swapped with a known good MAF, no change. Tested TPS and it showed within spec. It's not missing and I just changed plugs, wires and coilpacks a month ago.

Lost...

Any ideas?
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Old 11-26-2013, 07:24 PM   #2
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Nothing, huh?

I figured you Miata gurus would have it pegged!
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Old 11-26-2013, 07:42 PM   #3
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cutting/soldering maf wiring is a terrible idea on most cars. its usually shielded wire of some weird variety that can get really noisy if not done correctly.

that's all I can think of on this subject. most of us never hack up our maf wiring.

good luck dude
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Old 11-26-2013, 08:05 PM   #4
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Black electrical tape or heatshrink tube? Silver solder? Did you cut all the wires in a row or did you offset them so the exposed sections could not contact eachother? I would check your joints, sounds like something is touching.

Also, do I want to know why you relocated your MAF?
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Old 11-26-2013, 09:33 PM   #5
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Thanks for the replies.

Silver solder, offset with double heatshrink tubing on each wire then heatshrinked with an oversized(not tightly) heatshrink tube to form a bundle.

I agree, it sounds like something is touching/disconnected, but it's not.

No, you do not want to know why I relocated my MAF.

Any other ideas?
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Old 11-27-2013, 02:15 PM   #6
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Swap your ECU? It can't hurt to try it if you think you've tested/verified everything else in the circuit.
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Old 11-27-2013, 02:41 PM   #7
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Quote:
Originally Posted by Wastemore View Post
No, you do not want to know why I relocated my MAF.
Trust me, I know why you relocated your MAF

https://www.miataturbo.net/random-su...th-fail-62346/
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Old 11-27-2013, 06:07 PM   #8
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Quote:
EO2K contemplates the universe, his rotrex, and why they both fail

Werd to ya *****.
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