What is a memcal But that's off topic right now. May 14, 2024 · GM OBD1 ECM MEM/CAL MEMCAL PROM Adapter with ZIF (Zero Insertion Force) socket Compare to Moates G1 Memory Adapter Allows you to use a custom programmed chip (not supplied) with your GM 66 pin MEM/CAL ECM. Q. The FMD (Fuel Modeling Device) takes over and uses the resistors in the MEMCAL to adjust the fueling and timing. No CEL but a lot of codes. I would like to know more about each to be better able to choose the best one for me. There is a full 7427 ECU with BHDC memcal (7. Make an adapter to burn the PROM while it is still in the MemCal. The S2 Memcal was removed and placed inside that ECM. Jan 21, 2024 · C4 Tech/Performance - ECM/PROM/MEMCAL identificaion 1985 Corvette automatic - I need help identifying the ECM and PROM/MEMCAL for my car. Yesterday I destroyed some gasoline. Oct 20, 2012 · We are still learning about memcal internal circuitry and every piece of the puzzle is important. All the pins should be on the end where the big brown chip is which is why I have the blue cover off that factory memcal so you can see which end the H1 header needs to be in. If you run a V6 memcal on a V8 car, you'll get a code. I strongly suggest the low profile ZIF socket if your gonna be Mar 7, 2013 · My ECM is a 1227747, there are a lot of PROM chips available for it (listed below), mine was a ARJU, a Calif. I have ordered a replacement stock APYP memcal Nov 24, 2013 · The two codes were code 22 for TPS voltage low, which can't be because I had just adjusted the TPS today and tuner pro rt was reading . TCC won't work in LHM, but I doubt you could drive that fast? There is a trans LH routine in etrans Memcal PCMs. 8l man pcm 16231438 BSTJ barcode starts with 8614 and pink plug port 6760. Oct 5, 2023 · PCM/memcal must be recalibrated. Otherwise then go down path of swapping loom plugs over, get a VT V6 ECU and Loom plugs then remove all the old pins, then start swapping your pins into the new plugs using the spreadsheet. NOTE: 1227727 is a under the hood waterproof version of the 1227730 Apr 12, 2006 · Re: What is a memcal and can my car run without it? Turbotime rocks. The ecm number being the same, but chips Feb 26, 2025 · It has an aftermarket high performance labeled MEMCAL?, cleaned the MEMCAL socket, it will start but barely and a lot of codes. Apr 24, 2025 · Moates, Boosted NW and Red Devil River all sell a MEMCAL adapter that you plug your existing MEMCAL into then the adapter drops in where your MEMCAL is now. Better; off-idle ‘POP’ now. Programmed with the most up to date program that was released from GM. These are rebuilt factory prom chips that include the memcal. It is a module that plugs into the ECM, and contains a ROM chip that has the software and parameters that control the ECM. The engine was routinely running hot in traffic during the summer months. Cheers, misensei wrote:Hi, Thank you very much for many reply. It is BHDF and by the looks of the dust it is original. When you seat the memcal to the carrier insert the memcal intot eh ECM case first then kind of rotate the carrier down into the socket. Early model ECUs with 2 connectors use a “Long” memcal. It also has the knock module/ESC. To reprogram the factory memcal you will require a UV eraser and an EPROM programmer. dll file, remember to put the two file in same directory with all Eng names. This is the method similar to what the big chip people use (i. However, UV is dangerous and care should be taken to keep your eyes shielded from the light as much as possible. Oct 19, 2016 · The ECM I cleaned and removed from my ECM the memcal AXCN and inserted into and into the cutlass supereme ECM. EPROM refers to chips which are attached to the Engine Control Module (ECM) from 1982 to 1985. Jan 5, 2011 · MEMCAL Installation Checking ECM's for bad Solder Joints Section 2: General Motors Information PROM Cross Reference Index includes years 1980-1997 I also got the latest GM EFI training manual on 3 CD set. Then place the H1 into the Burn2 programmer. TPIS, AS&M, etc). What he can’t tell me as gm no longer has the information listed is what prom/memcal chip part number is for a similar truck with a 5. Note you will need to remove the cover to install this adapter however after that simply Sep 8, 2013 · A new MEMCAL that matches your application is ideal, but there is a jumper that can be added to have the hardware side have the proper cylinder count set for an 8 cyl. Can you read the small numbers on the knock board? Also, is there a date on the memcal label or maybe in the . how to locate the ecu to then replace the stock memcal with the mace engineering performance memcal, hope this helps. 7 engine. com is your best source for these preprogrammed memory chips. The offset into the chart is the relative vehicle speed, while the byte values in the table are the relative throttle position required for unlocking the TCC. No Etrans with these ECM so no trans funtions. . net into bottom of the GM memcal. Make it the same length as just the eprom chip, and use that adapter to fit it in to a programmer without removing it from the memcal. 4 memcal in there, but vendors think those things are gold and they are going for $250-350 on Ebay just for the memcal. In today's video we are talking about memcal tuning for ecotec / l67Join our Facebook group if you want to learn more about tuning the V6 ecotec platform:htt Mar 1, 2009 · The most basic would be just reprogramming the factory memcal. My vette ran as usual. The EPROM is often referred to as the "chip". What is an EPROM/Memcal Chip? An EPROM or erasable programmable read-only memory, is a type of programmable read-only memory (PROM) chip that retains its data when its power supply is switched off. There are ways around having a TPI memcal but you lose limp home and most people have trouble getting the knock sensor circuitry to work. Aug 2, 2013 · Hi all I'm new to pcm hacking and wanted to know what is a good memcal to fit my car with the following ecu and also if any can identify the current memcal. Dec 5, 2017 · I am not familiar with a 1226870 ecm to even know if it uses a PROM chip or a full memcal. Apr 7, 2012 · Hello If this is your first visit, be sure to check out the FAQ. I got this car secondhand, and someone diagnosed it, they said to check the ECM/PROM The PROM code is missing, and the code on my memcal is 16042438 which does not come up in any The MEMCAL is used inside the ECM on W-body cars from 1988 thru either 94 or 95. Copied that MEMCAL bin and labeled it as 87vette (copy attached) Via TunerPro RT I attempted to delete the VATS on the downloaded GearheadEFI bin also attached. 85 Corvette C4 Prom Eprom Computer Chip Automatic HLH 3200 also found this one which is for the # 1227805 Nov 13, 2022 · C4 Tech/Performance - memcal eprom identification - Hi, I was thinking of a modifying parameters in ePROM to slightly reduce rev-hang, not sure if this is even possible this way, anyway, before that I wanted to see if any of the previous owners did anything to the ecm. MEMCAL is GM-talk for PROM and it contains a 27C256 ROM, PROM, or EPROM. DO a WEB search on ECM MEMCAL for more info . About Sep 6, 2010 11AM: Start with MemCal, Original Chip + adapter: Remove 2 deg directly from distributor. The old Thermomaster Hypertech was apparently not helping the engine stay cool, which I think is the thermomaster's purpose. The Broadcast Code, chip or BCC, can be found on the chip (eprom) or memcal of your ecm. Dec 11, 2022 · The EPROM is physically located inside the removable blue component, which is referred to as a Memcal. Highly unlikely it suddenly has bent pins without some sort of mechanical damage to the enclosure. The MEMory and CALibration (MEMCAL) device is a blue colored plastic Removable Unit that is located on the underside of the ECM and is found by removing it’s housing plate. It also houses back-up fuel control system which consists of an IC and some analog circuitry. I believe the work that you had performed was to the large main circuit board. Stock GM MemCal Stock GM MemCal with protective cover removed. That SE ECM works for the S2. There appears to be a relationship between memcal internal wiring and injector firing strategy and that may be part of the issue here. Nov 18, 2020 · What is an EPROM/Memcal Chip? An EPROM or erasable programmable read-only memory, is a type of programmable read-only memory (PROM) chip that retains its data when its power supply is switched off. The memcal (chip) is fitted in the PCM/ECU which is located behind the kick panel on the passenger side under the glove box. It contains the vehicle’s engine and transmission calibration data, fuel maps, timing, and other performance-related parameters. 00 core charge is added and will be refunded when the original prom/memcal is Aug 29, 2019 · memcal identification. The label may sometimes be found on the blue plastic cover (not pictured) or on the ecm case. The previous table controls the amount of throttle required to unlock the TCC at different speeds. Tried a second 165 ecm. Two common examples of a BCC label are pictured. 4/manual - this matches my truck and the base tune that I used) available. 4. GM has discontinued availability of EPROMs and MEMCALs. Jan 17, 2002 · The resistor networks on the memcal hold limp-home mode as well as cylinder select info. An $95. I am way out of my comfort zone dealing with this. Even worse than before. ACSU, ACSW, AKAL, AKAJ, AKAR, AMUR, ANLW, ANLX, ANLZ, ARHT, ARJT, ARJU, ASDU, ASDW, ASDZ Dec 12, 2024 · C4 Tech/Performance - Mystery MemCal - On my 89 I have a high idle issue, after months of work and sharing my logs it was determined that the desired idle is set to 1050 rpm's and it does a great job of keeping that idle. Feb 28, 2009 · Note that if you get this style, removing the front of the door can allow the end of the memcal to be stuck in the unit, so the chip can be erased while still on the memcal. Crappy. Newer GM memcals may list the memcal part number instead of the BCC. Aug 9, 2007 · The term MEMCAL is typically reserved for a memory chip assembly consisting of a PROM and CALPAC chip(s), and possibly other memory chips or devices. Jun 23, 2009 · The memcal is the chip inside your ECU. Sep 6, 2010 2:30PM NOTE: The above is NOT a mistake, the 1227730 was used in both the 3. Its harder to explain than it is to do. Sep 6, 2010 1PM: MemCal, Original Chip + adapter. There are some jumpers inside the MEMCAL that determine if it is programmed for a 4, 6 or 8 cylinder engine. 3 v6 5spd truck. One PCM covers more vehicles with a Memcal change. May 21, 2018 · Those stock MEMCAL's must be pretty tough. Oct 26, 2020 · That 6395 is what was pulled from the truck, buddy at the gm dealer confirms via vin# that it is the correct part it left the factory with. Sometimes, certain instructional literature or documents may use the terms PROM and MEMCAL interchangeably. On vehicles equipped with a carburetor, the ECM will typically contain only a PROM. A 7730 uses a memcal. It bypasses the existing PROM and has a machined PROM socket that you can either put your EEPROMS in or put a ZIF socket in. In the cutlass superme ECM a memcal AXKK was installed. MEMCAL is it’s general term for the components within; 1) a 27C256 EPROM and 2) it’s back-up fuel control system consisting of an IC and it’s analog circuitry. The term MEMCAL is typically reserved for a memory chip assembly consisting of a PROM and CALPAC chip(s), and possibly other memory chips or devices. Nov 22, 2011 · *This is a work in progress* The 1227730 was used in many applications, including J-bodies (Cavalier and Sunbird), F-bodies (Camaro and Firebird) and others. Later model 3 connector VS and VT PCMs use a “Short” memcal. Low-Profile ZIF Modified GM MemCal with ZIF Modified GM MemCal with ZIF and new EPROM. The crank / no start is most likely VATS related; your stock memcal is looking for a set VATS resistance and the Hypertech chip probably has the VATS deleted The C4 Corvette Memcal Chip is essential to the Corvette’s engine control module (ECM). MEMCAL stands for MEMory CALibration module. The memcal is removable, and located within the ECU behind a cover plate. bin? The Broadcast Code, chip or BCC, can be found on the chip (eprom) or memcal of your ecm. Jun 14, 2016 · in a VT, you can pull the memcal from the pcm, then lift the lid off the memcal, peel the silver sticker off the Eprom window, sit the whole thing into a UV eraser, erase it, then plug the1s adapter into the memcal, which will give you 32 pins to stuff into the zif socket of your eprom burner and burn your new tune. First, either disconnect the battery or Oct 9, 2012 · But not for the LH funtion, more run functions like cylinder count. My question one can the AXKK somehow convert it as AXCN runs. Try unplugging it and plugging it back in again. These following steps regarding wiring only apply if your undertaking a complete conversion (meaning Ecotec/Buick V6 and automatic transmission swapped with an L67 and manual transmission) - bridge neutral/park safety switch permanently for the car to start - wire up the manual speed sensor to the dash (3 wires) Oct 5, 2023 · PCM/memcal must be recalibrated. e. Restart HYSYS, find MemCal in pallete. The ecu/pcm service number is 16210672 3. These following steps regarding wiring only apply if your undertaking a complete conversion (meaning Ecotec/Buick V6 and automatic transmission swapped with an L67 and manual transmission) - bridge neutral/park safety switch permanently for the car to start - wire up the manual speed sensor to the dash (3 wires) Apr 24, 2012 · Glad you got it working as planned! All writeups to tech issues are always welcome! Pictures help as well. What is "Tip in bump spark"? Mar 10, 2024 · I'd slap a 7. I've heard that a number of these ECMs were defective. We have thousands of calibration files to cover most applications and the list grows constantly. Open HYSYS with Admin user, find the register Extension button, register memcal. Feb 23, 2018 · If it was my car id first look for a VY V6 L67 engine loom, if you found one at reasonable price then just swap it over. My car is a vs ute with t5 gearbox with a vx l67 engine. I have know idea what to purchase to put in the reman ECM? I do believe I need a new Prom. Set timing back to 8 + add 2 deg mechanical advanced. eproms for gm vehicles Feb 23, 2021 · What is an EPROM/Memcal Chip? An EPROM or erasable programmable read-only memory, is a type of programmable read-only memory (PROM) chip that retains its data when its power supply is switched off. It is a canadian build so don't know if that changes the bin. Idle stumbles a bit; isn’t smooth – jumps around. Can anyone identify if this is an original stock 1991 auto l98 memcal? Thx Reply. Fuel Injected! What does the knock filter do? The ute was factory manual and yes there was some splices into the oem loom but I need to only know what memcal I need I spoke to injectroincs and they said speak to a memcal tuner as the ecu and pcm is the same unit it's just the memcal that differs. Cylinder Select, PROM Chip, Knock Filter, and Limp Home Mode. Sep 24, 2009 · The memcal programming is what makes it unique to a particular car / engine / trans combo. Apr 18, 2020 · If you want to home brew it you can get a strip of vero board,cut down the middle of the tracks and install two rows of pins that line up a standard DIP socket and 2 in the middle that fit in the the memcal. This could be the first of many memcal mods that need to be documented, we have a couple on installing chips and zifs, but really need to put together all the jumper and ground changes needed for 6 and 8 cylinder TBI and MPFI all together as one article. Under the clear sealer is a code in purple, blue or black ink. Start by putting the needed H1 header adapter from moates. Jan 6, 2011 · So next step, open memcal ID, pick a vehicle to have a play with, so VR V6 manual for example if you look in memcal id tool under VRV6 and pick BLCD it's program ID is $12, which means you need a XDF $12 file to be able to reference the bin so you can be able to edit it. The chip is sometimes located in a removable carrier called a MemCal or Calpack. For those who choose to ship their memcal. If you'd like to post messages please Sep 2, 2018 · “MemCal” is a vital HYSYS extension that allows process designers to simulate, optimize and evaluate the cost of complex multi-stage membrane processes. But what else is there and what does that stuff do? I can think for four basic functions to the Memcal. Print out the required information page, and answer the questions to the best of your ability. Jun 23, 2012 · Your memcal can be programmed for $75, or a used memcal outright for $110, and all options include USPS Priority shipping. Memcals for speed density TPI systems are getting hard to find and expensive when you do. When the need for a EPROM or MEMCAL arises, gmeprom. Before starting anything it would be a very good idea to buy a spare memcal from a wrecker and program this instead, this way you will have a backup in the form of the original memcal. Oct 19, 2016 · Limp mode only happens when the microcontroller is completely dead. 0 Aug 29, 2019 | 07:44 PM Share Mar 14, 2015 · The burb has the motor out and is stored so took awhile to get to the pcm. 1 & 305/350 TPI. 55v at idle, so it definitely isn't low, and code 51, which as I understand is for a problem with PROM or a faulty memcal or something? So my question is, what is the diagnostic for it? What are the possibilities? Jul 15, 2020 · When I google those part numbers !st ( 1985 CORVETTE ECM COMPUTER CALPAK ASSEMBLY GM #16042437) and the 2nd ( 85 w/AT Prom Chip (Memcal) #1227805). Feb 16, 2012 · There is a way to identify a memcal by the knock sensor board. chip. I don't have a complete breakdown of the code but the second or second and third letters will identify the engine the ESC board was designed for. Jul 14, 2016 · Curious about what all is in the memcal? People say that memcal's have a cylinder count so v8 memcal goes with a v8 ect.