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Old 09-08-2011, 08:09 AM   #1 (permalink)
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Default D16y8 problems

I have a 1997 honda civic with a d16y8 running on y7 ecu runs good put a p2p a31 in and hooked vtec up and it idles up down up down and it jerks in gears and doesnt drive right at all the throttle body seems like it is sucling alot of air from the hole in the throttle body if put finger over hole idle smooths out and runs perfect
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Old 09-08-2011, 08:50 AM   #2 (permalink)
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HUHHHHHHHHH!!!!!!!

You put a y8 engine using a y7 ecu no vtec YO! is was running fine. Put in p2pa31 wired in vtec and now it's acting up.

WAWAWI!!!

I think A31 is for 99-00 ex obd2b. You might need a jumper harness to obd2a.

Someone else will chime in.

Edit: just cause I'm nice

37820-P28-A02 AWL 760-840433 92-95 Honda Civic EX 1 5-speed
37820-P28-A01 ARM 760-620375 92-95 Honda Civic/CRX EX 1 5-speed
37820-P06-A02 AUI 740-327690 95 Honda Civic LX 1 5-speed
37820-P06-L00 AP? 742-501219 92-95 Honda Civic DX 1 5-speed
37820-P2T-A11 Z4 99-00 Honda Civic Si 2 5-speed
37820-P2P-A31 99-00 Honda Civic EX 2 5-speed
37820-P2E-A12 59 1200-246675 96-00 Honda Civic LX 2 5-speed
37820-P2E-L01 EF 901-115146 96 Honda Civic DX 2 (5-speed)
37820-P2E-L02 LG 901-200297 96-00 Honda Civic DX 2 (5-speed)
37820-P2P-A34 UP 921-322852 96-00 Honda Civic EX 2 5-speed
37820-P2E-A71 ER 260-175174 96-00 Honda Civic DX 2 (automatic)
37820-P72-A02 G1 970-102606 96 Acura Integra GSR 2 5-speed
37820-P2N-A61 1111-301713 96-00 Honda Civic HX 2 CVT
37820-P2N-A31 297-302848 96-00 Honda Civic HX 2 (5-speed)
37820-P75-A53 981-202919 98 Acura Integra LS 2 Automatic
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Last edited by dj211855; 09-08-2011 at 08:57 AM.
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Old 09-08-2011, 09:22 AM   #3 (permalink)
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wrong section and use punctuation.
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Old 09-08-2011, 11:56 AM   #4 (permalink)
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DIY?.....ok
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Old 09-08-2011, 12:10 PM   #5 (permalink)
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iacv problem. one of the hole inside the tb is the iacv hole which when you plug with ur finger will basically bypass the iacv.
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Old 09-09-2011, 05:24 AM   #6 (permalink)
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wrong section and use punctuation.
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2010-294whp D16Y7 T3/T4 24psi E85 12.77 @ 111mph!

2011-360whp D16Y7 GT3076R 25psi E85 12.05 @ 115mph!

2012-414whp D16Y7 GT3076R 28psi E85 11.68 @ 124mph!

Current Ride- 09 Acura TSX
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Old 09-09-2011, 05:40 AM   #7 (permalink)
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I'm pretty sure the P2P-A31 is OBD2a... and the P2P-A12 is OBD2B I have the Canadian 99-00 version and it's P2P-C12.

A quick ebay search shows the P2P-A31 has the OBD2a pinout, so he doesn't need a harness.

My 0.2 is that he needs to do the proper idle reset. been in that scenario and that's all it took... Try this straight from the manual but from my perspective:

- disconnect the Backup (7.5a) fuse from under the hood for 20 seconds (manual says 10 seconds)
- turned car back on, idle was solid at 750.
- Let it idle for 2 mins, no load,
- introduced low beam headlights. idle bumped down but back up to 750 instantly. let it idle like that for a minute,
- then turned off lights and turned fan on high with AC on, idle bumped down than back up sold just about 800.
The manual then says to let it idle for a minute with AC, I let it idle for 4, in that time the rad fan came on three times, by the third time the idle didn't bump at all, so I have to figure it was working correctly at that point.
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Old 09-09-2011, 08:36 AM   #8 (permalink)
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Which throttle body are you using?
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Old 09-09-2011, 07:56 PM   #9 (permalink)
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diy esploded my car with vtech y0
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