so where the retroJECT units failed mostly is that both IAC valves were not compatible with MS2 as it stood. after a lot of fault finding work, the "Dyno Chap" Marc, said, "I should have another IAC that has the same connector, lets just try that, but for 2 hours we had both discounted the idea that both of the IAC units could be inop. GM IAC clipped onto the harness, worked first time. bumhats.
A little research overnight means that I may need to short a couple of power resistors on the MS board, anyone have seen this before?
the GM IAC that worked had a resistance across the coils of 40 Ohms the RetroJECT ones have a resistance of 56 Ohms. I'm hoping that that is the clue into what is not right rather than the slightly more dissapointing version of they are duffers.
Nope, maybe not the answer, but I will know early next week what I have to do to get a steady idle with the current automatic transmission setup. Shorting the power resistor on the main board did not change anything. oh well!
While that's waiting, have a couple of pictures of the installed units.
yes, but I think it follows the GM style version, also confirmed by webcon. 53 Ohms per coil, I even modded the board in case the extra power resistors were the issue. they were not.
in other news I was bored tonight. it was 90 degrees today, and is still 80 at 10pm. not a good night to play outside on the iac so I took some parts I have had sitting around and made something I've wanted to for ages.
volume of the box is almost exactly that of the previous home. it is silk lined too, my sub will be happy here
Iac? I found that one coil was wired up backwards, that didn't help, but out of the 4 iac units only one works. That is impressive, no?
I think the coil resistance of the iac that did work was the lowest at 46ohms, the rest were up at 53-55 ohms per coil.
So now it's tuning the settings but idle is already better.
I also took the opportunity it wire in the coil that controls the transmission slip at idle, using the fidle output at tps below 5%. This alone was a huge improvement in driving characteristics in traffic. Less stalling and left foot breaking is required now.
Been really using the old girl a lot, and longer drives at that, been to Connecticut, Cape Cod, New Hampshire, all over Boston and the eastern side of Massachusetts. Hasn't missed a beat, but I could tell we are getting more blowby on the engine, with more oil misting out of the breather. not to worry, I have at least one spare engine on the side.
Last week it killed the Megasquirt inj1 circuit, or at least I think it has. I'm blowing fuses in the relay board for INJ1 and I can't see anything as a short on either board or indeed find one through testing. I've had to put it aside for the moment, with other things taking the need of spare time more.
This has however made me start looking for a M104 24valve engine and a suitable manual gearbox for a planned upgrade in the future. I also know I would need to swap out the 4.08 rear that I have in the car for a taller ratio that is more in line with the ones for that combo. I met a chap that is pulling his 4.5 rear for something more beefy to cope with the engine he's just put in.
Motivated by the death of my megasquirt (or unconfirmed death, but I'll take what I can get) and the turbo nutter above, I have just put a deposit on a M104.981 3.0L 24valve engine, with all ancillaries, harness and engine management. It's coming out of a 300SL-24 with 70K on the clock. I've also just found a 716 gearbox with 110K on it, but I've got to confirm that I can get all the shifter and flywheel etc with it.
New engine has been released from its old home. I'm probably going to pick it up on wednesday, but the guy selling it has emailed me the below.
Dual Mass flywheel that works with this engine is on it's way from Germany, I'm going to order the clutch to go with that flywheel and I'm also going to pick up a 716.6 gearbox with the shifter and cross-member on Wednesday too.
Are you familiar with the M120? I have an idea for a "modernized" classic MB to use for business, but I've never been around a W108/109 long enough to tell; do you think a V12 could fit?
I've long tossed around the idea of tossing in a M120 into my '84 500SE, but focusing those funds on a 108/109 instead seems more appropriate, and I could stand to make the cash on the swap back by offering services with the vehicle locally.
'85 Euro 190E 2.3-16 '84 Euro 500SE ~100k miles '51 Euro 170S M117 Swap Project?! '97 Jeep Wrangler Sport ~42k miles '09 E350 ~51k miles '98 Dodge Durango SLT+ 5.9L Magnum V8
I've only seen one V12, and that was a SL (R129) I guess if the I6 will length-way and the V8 will fit width-way then the V12 could fit. It's a big enough bay for a 6.3, and that's a beast of an engine.
My google-fu didn't pick up anything that anyone has admitted to as of yet, but there's always a first!
I'm thinking of making some harnesses to run the M104 as a standalone once I get it figured out, see if I can sell them as a sideline.