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The engine came from a junkyard and was told it was a 95, It seems to be a good engine but I was told the ECU prom needed to be up dated.
It starts right away but shuts off after a few seconds.
From: Liliha Bakery stuffing my face with coco puffs!
Is this the same ECM in your photo album??? The year is clearly marked on the case but doesn't matter since the BCC is BDBK. Got any pics of the engine??? A MAF sensor or lack of one would help determine if it's the later '95 engine or not. I believe the '95 PCM uses a different connector than the '92-'93 ECM as well. Give us more details as to what you're doing and maybe we can give you better answers. Might be something as simple as deleting the VATS or giving the ECM the correct xxhz signal to disable the VATS.
Last edited by stew86MCSS396; Jun 3, 2024 at 02:17 AM.
Is this the same ECM in your photo album??? The year is clearly marked on the case but doesn't matter since the BCC is BDBK. Got any pics of the engine??? A MAF sensor or lack of one would help determine if it's the later '95 engine or not. I believe the '95 PCM uses a different connector than the '92-'93 ECM as well. Give us more details as to what you're doing and maybe we can give you better answers. Might be something as simple as deleting the VATS.
Sorry not sure what picture in my album you are refering to, there are so may in there.
I also have a 1990 L98 TPI engine in my 55 Chevrolet truck, that had given me problems for years, now it is finally fixed and runs perfect.
What is the VATS?
This current engine is installed in a 1950 Buick. as stated, it seems to be a good engine and starts right up but shuts off after a short time.
My understanding is it required the key and switch (not sure) but that was not included with engine but the ECU and wiring harness was.
As with the 1990 L98 TPI it required a custom Prom so I think this engine also requires a custom prom. Here in Thailand no one has these engines so this forum has been a great help oner the past 20 years.
Any help is always appreciated, cheers, Dean
Last edited by Bangkok Dean; Jun 3, 2024 at 03:18 AM.
From: Liliha Bakery stuffing my face with coco puffs!
Vehicle Anti Theft System...
In the 1950 Buick transplant, you probably don't have everything between the chip/diode coded key and the ECM...which includes an ignition cylinder that can read the key, VATS module, starter enable relay, CCM etc. I believe the VATS module when satisfied by the correct key, it generates a signal 30-50hz to the ECM. Once the ECM sees this signal, it allows the injectors to continuously pulse. You could defeat this system with a signal generator at the desired hz or have a PROM programmed with the VATS disabled.
The engine came from a junkyard and was told it was a 95, It seems to be a good engine but I was told the ECU prom needed to be up dated.
It starts right away but shuts off after a few seconds.
Does the 92-93 require a certain key to run?
www.tunedperformance.org can disable your vats in the chip
or amazon timer shop has a hz module.
Vehicle Anti Theft System...
In the 1950 Buick transplant, you probably don't have everything between the chip/diode coded key and the ECM...which includes an ignition cylinder that can read the key, VATS module, starter enable relay, CCM etc. I believe the VATS module when satisfied by the correct key, it generates a signal 30-50hz to the ECM. Once the ECM sees this signal, it allows the injectors to continuously pulse. You could defeat this system with a signal generator at the desired hz or have a PROM programmed with the VATS disabled.
Thanks for getting back, that picture I found on the net it is not the one here. sorry confusing. The pictures in the current link is the one here includind the sticker on top.
Beginning in 1992, the Fuel Enable portion of "VATS" is a data communication handshake between the CCM (body controller) and the ECM. The FE signal is no longer a square wave signal, and the timers.shop module that works in the earlier cars, will not work in the 92-up.
Bangkok Dean's best (only?) resolution is to obtain a custom chip with VATS disabled.
Need advice on creating a replacement 1995 prom.
