code 16 after mpfi

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Old Mar 6, 2013 | 09:13 PM
  #1  
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From: modesto, ca, united states
Default code 16 after mpfi

so heres the rundown. i have a b8 block with a6 head i just did my multipoint swap using ps9 ecu z6 manifold with obd1 injectors. im getting a code 16 and 19. the 19 is expected given my cars a 5 speed but the code 16. i did my wiring real careful double checking everything as i go. i only ran 2 wires to the dizzy and 2 for the injectors. i turn it on and it barely idles then it just wont start after a while. my question is on how i wired the injectors. i saw somewhere that you run all 4 to the ecu pin a15 but what i did was soldered the 4 yellw/blk together then soldered those 4 to the 2 yllw/blk wires from the old injectors. is this my problem? should i depin a15 and run it to the injectors?
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Old Mar 6, 2013 | 11:55 PM
  #2  
ED3 SEDAN-GSR's Avatar
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Default Re: code 16 after mpfi

Its probably something else. I did mine the same way and have had no problems. And im using the same harnes for two different swaps now. First one was a sohc mini me now i have a gsr. Both ran fine
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Old Mar 7, 2013 | 12:10 AM
  #3  
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Default Re: code 16 after mpfi

any ideas on what it could be?
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Old Mar 7, 2013 | 08:02 AM
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Default Re: code 16 after mpfi

Bump really need to get this car going
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Old Mar 7, 2013 | 08:23 AM
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Default Re: code 16 after mpfi

Do you have access to the FSM? Or Helm's manual? There's a test procedure for trouble shooting. I recently had the same code pop up intermittently before the car finally died completely. Turned out to be a sensor in the distributor going out which provides signals needed to fire the injectors.
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Old Mar 7, 2013 | 08:31 AM
  #6  
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Default Re: code 16 after mpfi

Well what about vacuum? i find no vacuum ports on the z6 manifold so i capped off the three vacuum lines. i believe one is map sensor where do i plug it to the manifold? i know that alone will cause problems
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Old Mar 7, 2013 | 09:12 AM
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Default Re: code 16 after mpfi

Worst trouble code ever.

Since injectors do not have sensors in them, this is basically feedback from other sensors like your O2 screaming that something related to your fuel delivery is really wrong.
This could be ANYTHING that has to do with the delivery of your fuel as well as the ignition of the fuel mixture.

Fuel injectors, fuel regulator, fuel pump, fuel filter, fuel lines, injector resistor box (you should not have one with your specific injectors), distributor, spark plug wires, ignition timing, mechanical timing, spark plugs.
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Old Mar 7, 2013 | 09:13 AM
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Default Re: code 16 after mpfi

You do NOT run the power wire for all injectors (yel/blk) to your ECU!
They are supposed to go to the main relay.
EDIT for clarification: You do not cut them and run direct to ECU. They go to the main relay as well as the ECU pins A15 and A13.

What you did sounds correct.
- Take original 2 yel/blk wires and solder them together.
Attach them to 4 individual wires that go to each injector.

Last edited by 4drEF; Mar 7, 2013 at 09:38 AM. Reason: Clarification
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Old Mar 7, 2013 | 09:30 AM
  #9  
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Default Re: code 16 after mpfi

I know plugs wires fuel pump filter and all that is good i drove it 3 days ago before i started the swap
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Old Mar 7, 2013 | 11:25 AM
  #10  
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Default Re: code 16 after mpfi

Can map cause code 16?
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