PCM questions regarding L67 Swap into VY

Holden/Delco Tuning. ALDL, OBD 1.5. Circa 1989 to 2004.
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Re: PCM questions regarding L67 Swap into VY

Postby yoda69 » Sat Feb 15, 2020 2:16 pm

I don’t think you can really knock these engines out of timing.
Are you sure spark plug leads are on the right plugs & coils?

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Re: PCM questions regarding L67 Swap into VY

Postby VYL67L03 » Sat Feb 15, 2020 2:21 pm

yeah i looked up the correct firing order and made sure the leads were on the right coils and in order

Drivers side - 2/4/6
Passenger side - 1/3/5

I was talking to someone who started going on about the timing and saying you have probably knocked it a tooth or 2 out of timing and it has just gotten me thinking about it ever since.

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Re: PCM questions regarding L67 Swap into VY

Postby yoda69 » Sat Feb 15, 2020 3:11 pm

Unless you’ve done a cam change and mucked it up or somehow fitted the harmonic balancer/toothed wheel incorrectly there’s not much else it can be unless the crank and/or cam sensor are faulty or a faulty DFI module.
Check coil end matches the plugs as per image here
https://www.gmforum.com/1992-1999-91/fi ... er-259745/
I’ve mucked up on a stock Ecotec before mixing up 2 leads as they run under the alternator.
FC4CBA8F-0140-4FA9-A2E7-3554AB01BCC0.jpeg
FC4CBA8F-0140-4FA9-A2E7-3554AB01BCC0.jpeg (87.77 KiB) Viewed 1706 times

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Re: PCM questions regarding L67 Swap into VY

Postby VYL67L03 » Sat Feb 15, 2020 3:36 pm

Exactly what i was thinking, Thanks mate will go out and double check everything, Just noticed in that pic that my coil ( 2 & 5 ) sits where ( 6 & 3 ) sit in the pic

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Re: PCM questions regarding L67 Swap into VY

Postby VYL67L03 » Sat Feb 15, 2020 5:57 pm

switched that coil around & checked all leads and are in the correct firing order but unfortunately still not starting

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Re: PCM questions regarding L67 Swap into VY

Postby VYL67L03 » Sat Feb 15, 2020 5:58 pm

what would be causing it to backfire & spit flames out of the lower intake manifold ?

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Re: PCM questions regarding L67 Swap into VY

Postby VYL67L03 » Sat Feb 15, 2020 6:24 pm

stuffed round with the coils and leads, Hit the key & bang she fired up this time, Thankyou to everyone who has helped along the way i really appreciate it

:thumbup: :thumbup: :D :D

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Re: PCM questions regarding L67 Swap into VY

Postby yoda69 » Sat Feb 15, 2020 7:58 pm

:thumbup: Good to hear that part is now sorted. :thumbup:

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Re: PCM questions regarding L67 Swap into VY

Postby VYL67L03 » Sat Feb 15, 2020 8:11 pm

Thanks Mate :thumbup: :thumbup:

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Re: PCM questions regarding L67 Swap into VY

Postby antus » Wed Feb 19, 2020 12:03 pm

A bit late back to this thread, yes you dont need oseplugin on the flash pcm. At the time I was thinking we had a Memcal PCM with an NVRAM. That was a mistake on part - sorry! Im glad you got it figured out.
Have you read the FAQ? For lots of information and links to significant threads see here: viewtopic.php?f=7&t=1396

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