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Forum: DFI and ECM
08-15-2022, 06:18 PM
Replies: 21
Views: 643
Posted By natgariepy03

Re: '87 305 tpi timing advancing way too far while idling

It's been a while, so here's an update on what I've done on the car the past week:

I found that oil was leaking into cylinder 2 quite badly, and a couple others not so badly, so I changed the...
Forum: DFI and ECM
08-07-2022, 06:18 PM
Replies: 21
Views: 643
Posted By natgariepy03

Re: '87 305 tpi timing advancing way too far while idling

Vacuum gauge reads just over 20 in Hg both with every port plugged and with the vacuum system hooked up, and spraying starting fluid at the intake manifold gaskets did not cause any surges.
Forum: DFI and ECM
08-07-2022, 05:25 PM
Replies: 21
Views: 643
Posted By natgariepy03

Re: '87 305 tpi timing advancing way too far while idling

I haven't checked, but I have taken the intake plenum off a few times so I'm sure that everything is hooked back up. I suppose there could be a leak somewhere in the stock vacuum system on the...
Forum: DFI and ECM
08-07-2022, 01:24 PM
Replies: 21
Views: 643
Posted By natgariepy03

Re: '87 305 tpi timing advancing way too far while idling

I got a pressure gauge and drove around with it, it is at 45 when the engine is off, 37-38 when running under low load, and 45 when under load.

Here's a link to a video demonstrating the engine...
Forum: DFI and ECM
08-06-2022, 08:57 PM
Replies: 21
Views: 643
Posted By natgariepy03

Re: '87 305 tpi timing advancing way too far while idling

Tuned Performance,
Thanks for the suggestions, I will check on those

Komet,
Not exactly sure, I've got a 60 psi in-line pump and I'm running the stock pressure regulating diaphragm. Is it...
Forum: DFI and ECM
08-06-2022, 08:43 PM
Replies: 21
Views: 643
Posted By natgariepy03

Re: '87 305 tpi timing advancing way too far while idling

Yeah I think I've been a little confused. I guess it could be advancing correctly according to your table (I must have found something different when I looked it up). I didn't realize that it would...
Forum: DFI and ECM
08-06-2022, 08:36 PM
Replies: 21
Views: 643
Posted By natgariepy03

Re: '87 305 tpi timing advancing way too far while idling

I haven't read anything about that table, after a quick look it seems like it's related to spark latency? I just set the base timing to 6 as that's the number I found when researching stock...
Forum: DFI and ECM
08-06-2022, 08:06 PM
Replies: 21
Views: 643
Posted By natgariepy03

Re: '87 305 tpi timing advancing way too far while idling

Tuned performance,
Connected, when disconnected the timing reads a steady 6 degrees.
Forum: DFI and ECM
08-06-2022, 08:00 PM
Replies: 21
Views: 643
Posted By natgariepy03

Re: '87 305 tpi timing advancing way too far while idling

Another update: issue not resolved.

I've installed the new injectors, and the problem still exists when the engine gets to operating temp. Upon first startup when the engine is cold, the timing is...
Forum: DFI and ECM
08-02-2022, 08:35 PM
Replies: 21
Views: 643
Posted By natgariepy03

Re: '87 305 tpi timing advancing way too far while idling

Update: Issue possibly found!

Today while messing with the car after work I messed with the MAF, which seems to be fine, and then decided to unplug the cold-start injector. This seems to have...
Forum: DFI and ECM
08-01-2022, 09:43 PM
Replies: 21
Views: 643
Posted By natgariepy03

Re: '87 305 tpi timing advancing way too far while idling

RBob,
As for the codes, I don't have a way of getting them because I do not have the entire electrical system from the donor car. (it was totaled in the 90s and my uncle pulled the engine and...
Forum: DFI and ECM
07-31-2022, 06:22 PM
Replies: 21
Views: 643
Posted By natgariepy03

'87 305 tpi timing advancing way too far while idling

I've recently swapped a 1987 305 tpi engine into my 77 corvette and I am having troubles with the timing being way too far advanced. I set the base timing to 6~7 degrees and the car runs fine when...
Forum: Engine/Drivetrain/Suspension Parts for Sale
07-10-2022, 08:29 PM
Replies: 10
Views: 3,784
Posted By natgariepy03

Re: Moates APU1 autoprom $200 United States

Is this still for sale/available? I'd be interested if you can ship it to Michigan.
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