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P0100 P0340 codes, JDM SWAP

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Big28 2gFWD

15+ Year Contributor
108
1
Oct 11, 2004
port st lucie, Florida
Ok, I've done some searching on the site and came up with a few answers on my own. I'm going to continue with this post to hopefully find one answer and possibly answer questions for a few others in the future.

I completed the final touches of my swap yesterday. Car is a 99 GST with a JDM 7bolt swap (It's not an evo3, I believe it was sourced from an Expo RVR due to the automatic transmission and 13g turbo). Anyways, onto the problems.

Car starts, idles extremely low (around 500rpm) for about 2-3 seconds, then dies. Luckily, I threw some codes.
P0100 Mass or Volume Air Flow Circuit. Appearently this is a problem with my MAF. Its a stock 2g MAF. Luckily a buddy of mine had another stock 2g MAF laying around, I swapped his on, same result. My MAF was working fine before I blew the original motor, and after swapping on my buddy's I am confident that the MAF itself is not my problem. I still have my S-AFC hooked up on the car, I am getting absolutely no Karman reading. It stays at zero even when the motor cranks. I checked my wiiring where i spliced into the ECU, it all seems rock solid still. So my question is where do I look now? Maybe it's a problem with my connector, but I am unsure of the proper way to check that?

P0340 Camshaft Position Sensor 'A' Circuit (Bank 1 or Single Sensor). After searching I am positive this is the reason my car is dying after a few seconds. It looks like a few others on this site have been down this road before, thier symptoms are identical to mine. Being a 99 my car has a CAS on the passanger side intake cam. On the Jdm motor I recieved it has a CAS set up like the 2ga's. Meaning that it is behind the timing belt. I thought I'd just be able to swap on my original CAS(99) and leave the plug coming out of the timing cover unplugged. Theoretically it should of worked, except that on the JDM motor the inatake cam isn't threaded to accept a CAS. Swapping cams is not an option for me so this is what I am thinking of doing. My factory CAS plug is a 3 wire. red, blue, black. The CAS plug on my Jdm motor is the same, red, blue black. I am thinking that if I just extend my harness and somehow find the correct male plug to fit the CAS thats internal then I should be ok right? I'm thinking that as long as my ECU is getting signal from that sensor, it shouldn't matter the location of the CAS. Just looking for someone to either verify or tell me I'm wrong.

Oh, and I got a bonus code of P0443. But that's emissions, so who cares
 
I did the same swap with my 95 talon tsi. what i just did was use my old intake manifold and swapped out some brackets and was pretty much ready to go. I never had any problems with my maf though. never any codes. But i heard its a pain to use that cyclone intake manni.
 
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