mr305

iTrader: (1)

Thanks

kad5118

did they ever come out with a similar circuit board for the 90-92 tpi wire harness

efi-diy

No - there was a reason why - I just can't think of it now.

kad5118

such a pitty thats more money for them that they could have made

Maverick H1L

iTrader: (8)

Someone should tell them that there are a lot more vehicles than the 90-92 F-bodies running around with the 1227730. Namely just about every FWD V6 produced between 86/7 (88+ I'm sure of) and 94 (except W-bodies). And vehicles that have been adapted to use the 730. Oh, well.

A question about these adapters and installation into the 165/302 case...

Just how do these things mount? I can see it's obvious how the adapter mounts, but the MS? Am I supposed to get some sort of standoffs or something?

Maverick H1L

iTrader: (8)

Adding some info here...

Went and did a Google search last night for "GM ECM connectors" and came up with the following part for the 56-pin connector as is used on the 165 and similar ECM modules. I ended up doing a search because the junk ECM board I was going to scavenge the connector out of has gone AWOL on me .

Mouser carries the Delphi 12110209 56-pin ECU connector. It's light blue, however, not black, for the purists out there, and it's the only color it comes in, apparently. It's $13. If you'd rather not hack up an ECM, this is a good option.

88Greg

Zombie !


Are these still available ? The one linked to in post 200 does not seem to be the same unit discussed earlier. I guess there was not any further development for the 3-connector style ECM's ?

Tibo

iTrader: (15)

I've ran MegaSquirt I, II, and now III and always found these threads to be ridiculous. Just cut the vehicle's harness 6" before the stock ecm connector and solder in the new MegaSquirt harness. Save the old harness and if you want to go back just cut again and resolder. If you really have to use a stock connector than buy a junk ecm and desolder the connectors from the PCB and reuse that connector. One of the main MegaSquirt suppliers made and sold these conversion boards and after a year had them all on clearance because the overwhelming majority of MS users have no problem with rewiring, soldering or making their own harness. They were even on clearance for a looong time because again, MegaSquirt users didn't need them. Not trying to be rude but if someone is trying to find a conversion box to avoid work then the world of MegaSquirt is not for them.

88Greg

I hear ya !. But not everyone wants to hack the harness. Being able to go back to stock easily is a definite advantage. It seems the lack of a 3 connector version for 90-92 cars probably killed the appeal too.
The main black connector can be found new, But cannot find that yellow 3rd connector from any supplier, Could hack a junkyard ecu to get the connectors, true, but the '730 ECUs that used the 3rd connector seem to be getting more rare and expensive. Every car at the junkyard locally that had one has been plucked. Ebay units are over $100.


The adapter board could also have some electronics on it to handle the stock vehicle systems. Stuff the Msquirt does not do.

Tibo

iTrader: (15)

There is much that MegaSquirt I can't do. MegaSquirt II can do everything the stock ecm can do but will need an add on controller. MegaSquirt III can do everything a '730 does and more. Then there is MS Pro that is possibly the best fuel injection controller available.

RBob

iTrader: (1)

Just asking, are you telling me that the MS-II and the MS-III can properly control the CCP, EGR, and AIR systems on stock 3rd gens? How is the TCC handled? Does it use the 4th gear switch to program how the TPS vs MPH affects lockup? Does it even use a TPS vs MPH lockup table?

Diagnostics of sensors? Proper closed loop fueling to keep a cat-con active?

RBob.

Tibo

iTrader: (15)

To be honest I haven't used emissions equipment in at least 12 years so when I was talking about MegaSquirt I was not thinking about emissions equipment. I was only thinking of fuel injection controllers, which is why my last sentence I said fuel injection controller instead of ecm. The other member did say "vehicle systems" but I was thinking coolant fans, A/C, traction control, etc. However, if the emissions equipment relies on a simple on/off based on input from one (or maybe 2?) sensors then MSIII should be able to do it with the spare inputs.

Kinda the same thing here, I've never ran an automatic transmission so I was not thinking of an automatic transmission. In that case you are correct and you would need the MicroSquirt Transmission controller.

MegaSquirt III can be used in closed loop and allow for long term fueling changes over time. Diagnostics of sensors such as trouble codes is something I have never looked into since its something I just wouldn't use. I would think if it isn't it code be written into the tuning software.

After writing all of that you've proved that I need to clarify my prior comment. As I have said in the past the MegaSquirt world is not for someone who wants a diagnostic port to flash trouble codes, it's not for someone who needs to control emissions equipment and it's not for the set-it-and-forget-it crowd.

88Greg

If I am not mistaken, The 7730 ECU handles the raw VR signal from the trans sensor and provides the signal to run the speedometer, eliminating the "yellow box" on earlier cars. ?
As said, TCC control is quite refined in the stock ECU based on various data, or can be crude with aftermarket solutions.
Even the $$ MS3 cannot handle the raw VR signal from the speed sensor on the trans. It needs an adapter board. Thus my suggestion that the plug in adapter subject of this thread could incorporate those electronics. Looking through the posts, many just wanted a "plug and play" option for the 90-92 cars.

RBob

iTrader: (1)

It does buffer the magnetic sensor and provide pulse streams for the speedometer and cruise control. The '7730 also has an input for an optical/digital VSS, but no pulse streams when used.

RBob.

83 Crossfire TA

iTrader: (2)

I do run the conversion adapter and it's the second car I've used it in, it makes it really nice to move stuff around- just plug it in, pull the wires out of the engine bay that you don't need (I bundled them up by the firewall and have slowly been adding new circuits using them), either run a vacuum line or run the wiring for an external map in the engine bay (I've done both, ust re-routed the maf wiring in one, but I actually did that before the MS install when I converted to a later 730) and go, it's almost plug and play.

They didn't disappear because they weren't popular, they disappeared because they had a design flaw that made them a headache to build.

88Greg

Can you elaborate on that flaw ? I am considering designing something similar.

rgauder

iTrader: (1)

Does anyone still offer this? Can't find it on the website.

efi-diy

I'd have to verify but I believe I still have the design files for the board. So if there was enough interest I'd make more with a tweak to fix the assembly issue.

rgauder

iTrader: (1)

I'm interested.

efi-diy

min order is qty 10. I'd have to get a requote since its been so long since the last batch.

rgauder

iTrader: (1)

How much?