ECM/PROM/MEMCAL identificaion 1985 Corvette automatic
Oil Producer
Joined: Apr 2014
Posts: 9,360
Likes: 2,732
tequila and tuneport, question:
When I swapped in the HLH 3200 into my 85 automatic, I did it because of the TCC lockout. That dropped the chugging and feeling of stack shifting. It also dropped a hesitation when accelerating from a dead stop.
The other thing it did was totally correct a wandering idle. I could never get it to idle correctly prior to this. My 85 basically turned into my 87auto that i had at the time, but with the higher tcc stall which makes the 85 faster off the line.
From what you see in the files, can you see how it somehow managed the idle differently than the earlier programs?
That made me wonder if people with manual transmission 85s, could benefit in having their idle more stable. For example, my neighbours kid, Dominic.
He purchased an 85 and is slowly refurbishing it in his grandmothers garage. Can you tell if there is an update that would work for his manual transmission 85? To get a better idle.
edit: using siri to post doesn’t work.
When I swapped in the HLH 3200 into my 85 automatic, I did it because of the TCC lockout. That dropped the chugging and feeling of stack shifting. It also dropped a hesitation when accelerating from a dead stop.
The other thing it did was totally correct a wandering idle. I could never get it to idle correctly prior to this. My 85 basically turned into my 87auto that i had at the time, but with the higher tcc stall which makes the 85 faster off the line.
From what you see in the files, can you see how it somehow managed the idle differently than the earlier programs?
That made me wonder if people with manual transmission 85s, could benefit in having their idle more stable. For example, my neighbours kid, Dominic.
He purchased an 85 and is slowly refurbishing it in his grandmothers garage. Can you tell if there is an update that would work for his manual transmission 85? To get a better idle.
edit: using siri to post doesn’t work.
Melting Slicks
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Melting Slicks
Joined: Aug 2003
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From: Lakeville MI
For a 1985 MK2 4+3 car, I'd say that HLP 3266 would be the preferred go-to bin with its 750 rpm idle speed (HLP 2297: 650 rpm). For an MH5 car, HLS 2308 appears to be the latest.
Later model year 4+3 cars settled on a 700 rpm idle.
Last edited by tequilaboy; Feb 25, 2024 at 08:37 PM.
Thread Starter
Intermediate
Joined: Jan 2024
Posts: 25
Likes: 0
From: AZ
So, many months down the line, I have the car road legal, passed emissions, etc etc. Fuel injectors and EGR seemed to be the main issue, however, I still have a wandering idle, it's not as bad as before, and it's certainly more manageable. I've just started data logging with WinALDL, I'm still figuring things out with TunerProRt. I don't know what the data means if I'm being honest, even when putting the data into ALDL View. I was wondering if anyone could take a look at the log and give me a quick overview of what the car is doing.
