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Forum: performance & modifications 02-24-2021, 10:16 AM
Replies: 20
Views: 556
Posted By bobxyz
If you decide to go with, and can find, a good...

If you decide to go with, and can find, a good conical flange turbo, let me know and the downpipe is yours - link (http://forums.turbobricks.com/showthread.php?p=6115077)
Forum: maintenance & nonperformance 02-23-2021, 11:07 PM
Replies: 18
Views: 554
Posted By bobxyz
While the engine compartment fuses are different...

While the engine compartment fuses are different than your '92, you can find a late '93 greenbook at ozvolvo.org/archive - search for TP32352. I'm not sure which years of LH2.4 240s used the blade...
Forum: performance & modifications 02-23-2021, 11:00 PM
Replies: 20
Views: 556
Posted By bobxyz
Glad to hear that last week's great deal on the...

Glad to hear that last week's great deal on the '93 manny 245 went to an enthusiast, instead of someone just wanting the cheapest running car on craigslist to trash and neglect.

Around here, the...
Forum: maintenance & nonperformance 02-22-2021, 11:08 PM
Replies: 18
Views: 554
Posted By bobxyz
The CPS is just a coil of wire, plus a shield to...

The CPS is just a coil of wire, plus a shield to ground, so seeing ground on pins 1+3 is expected. The signal during cranking is fairly small, maybe 0.5volts or so on pin 2. When unplugged, the...
Forum: maintenance & nonperformance 02-20-2021, 02:19 PM
Replies: 71
Views: 1,875
Posted By bobxyz
Oh, I was thinking it was a little resistor,...

Oh, I was thinking it was a little resistor, instead of a bigger wire wound resistor. I'd guess that the colors are yellow, violet (instead of grey), silver, gold, which would be 0.47ohms. This is...
Forum: maintenance & nonperformance 02-20-2021, 11:07 AM
Replies: 71
Views: 1,875
Posted By bobxyz
Great, glad you found something wrong. Can you...

Great, glad you found something wrong. Can you post a picture showing the bad resistor and some resistors around it? The colors you list don't match anything sensible for a 4-band color code (and...
Forum: maintenance & nonperformance 02-19-2021, 11:28 PM
Replies: 71
Views: 1,875
Posted By bobxyz
Was the ECU plugged in when checking the...

Was the ECU plugged in when checking the shielding continuity to ground? If so, your measurement is OK -- the shields are connected to ground within the ECU box. I think Bentley assumes that the...
Forum: maintenance & nonperformance 02-19-2021, 11:23 PM
Replies: 4
Views: 326
Posted By bobxyz
The ECU needs to detect cranking before it will...

The ECU needs to detect cranking before it will fire the injectors. Cranking is detected via the RPM signal from the EZK ignition box, EZK pin17 to ECU pin 1. After failing to start, check the diag...
Forum: performance & modifications 02-19-2021, 08:21 PM
Replies: 13
Views: 553
Posted By bobxyz
That sure looks like antilag-like behavior...

That sure looks like antilag-like behavior (youtube: "turbo antilag", but don't get sucked in...).

Anti-lag is a way of keeping the turbo spooled up while shifting, or waiting to launch. ...
Forum: performance & modifications 02-19-2021, 12:56 PM
Replies: 29
Views: 4,438
Posted By bobxyz
Great, thanks for posting the follow-up to this...

Great, thanks for posting the follow-up to this puzzle. A+ for effort and persistence!

I'd guess that the gray box is some sort of noise suppressor to keep static from the radio. It apparently...
Forum: maintenance & nonperformance 02-19-2021, 12:51 PM
Replies: 71
Views: 1,875
Posted By bobxyz
It sure sounds like the ECM isn't working. If it...

It sure sounds like the ECM isn't working. If it was working, it would turn on power to the injectors and fuel pumps, via the fuel pump relay #15, when cranking was detected. The problem could be...
Forum: maintenance & nonperformance 02-19-2021, 12:02 AM
Replies: 71
Views: 1,875
Posted By bobxyz
The gray wire connects to the - spade on the...

The gray wire connects to the - spade on the coil. It's driven by the ignition box. It will be less than 1volt when the coil is charging (during the dwell time), and 12volts (battery voltage) when...
Forum: maintenance & nonperformance 02-17-2021, 10:13 AM
Replies: 26
Views: 1,110
Posted By bobxyz
Try a power balance test. At idle, disconnect...

Try a power balance test. At idle, disconnect one injector at a time and see if all the cyls behave about the same. You may need to give it some gas if it's not running well.

If one cylinder...
Forum: maintenance & nonperformance 02-15-2021, 03:32 PM
Replies: 4
Views: 458
Posted By bobxyz
Guessing here. The 2 wires would be spliced into...

Guessing here. The 2 wires would be spliced into existing wiring without a harness. Dim would be headlights on, used to switch the LED display between bright and dim. Rheo would be dashboard...
Forum: maintenance & nonperformance 02-12-2021, 04:24 PM
Replies: 3
Views: 472
Posted By bobxyz
I'm not familiar with 740s or 940s, but on a 240,...

I'm not familiar with 740s or 940s, but on a 240, the extra fan just for added A/C cooling is fused off the battery at 20amps. I'd guess a dual fan for primary cooling would need 50amps, or more.
...
Forum: maintenance & nonperformance 02-12-2021, 01:18 AM
Replies: 15
Views: 887
Posted By bobxyz
Temporary and TBcheap would be 4x stubby fat...

Temporary and TBcheap would be 4x stubby fat sheet metal screws
Forum: maintenance & nonperformance 02-12-2021, 01:07 AM
Replies: 27
Views: 1,517
Posted By bobxyz
I think I'd try wrapping a piece of cardboard, or...

I think I'd try wrapping a piece of cardboard, or a garbage bag, around the grill to block off the incoming air until daylight and [slightly] warmer temperatures.
Forum: performance & modifications 02-11-2021, 01:23 PM
Replies: 12
Views: 854
Posted By bobxyz
I think only the later turbo k-jet cars had the...

I think only the later turbo k-jet cars had the extra enrichment pin 11 -
http://www.turbobricks.com/mods.php?content=art0021

I'm not sure where I found these, but the '82 and '85 wiring...
Forum: performance & modifications 02-09-2021, 06:25 PM
Replies: 29
Views: 1,975
Posted By bobxyz
^^^ I think that was gross polluter posting here...

^^^ I think that was gross polluter posting here 10+ years ago with his MS tweaked redblock 245 -- the pictures are long gone, but the text remains:...
Forum: maintenance & nonperformance 02-09-2021, 01:32 PM
Replies: 8
Views: 759
Posted By bobxyz
Something's weird here. The fuel pump relay is...

Something's weird here. The fuel pump relay is actually 2 separate relays within the same cube. One relay is the main power relay, which supplies power to the injectors, MAF, IAC. The other relay...
Forum: maintenance & nonperformance 02-09-2021, 10:29 AM
Replies: 8
Views: 759
Posted By bobxyz
Do you have a multimeter? If so, with key on,...

Do you have a multimeter? If so, with key on, unplug one injector and measure the voltage across the 2 pins of the connector harness. It should be 0volts (closed). All 4 injectors are wired in...
Forum: performance & modifications 02-08-2021, 10:21 AM
Replies: 29
Views: 1,975
Posted By bobxyz
FWIW you can find the original EPA ratings here:...

FWIW you can find the original EPA ratings here: https://www.fueleconomy.gov/feg/bymodel/bymakemodelnf.shtml
Forum: performance & modifications 02-06-2021, 04:30 PM
Replies: 32
Views: 2,243
Posted By bobxyz
I suggested the MegaSquirt 2 or MicroSquirt...

I suggested the MegaSquirt 2 or MicroSquirt because they're most common here, with lots of support for old Volvo installs. Offhand, I'd guess that it's 10-to-1 MS2/uS versus other ECUs here.

If...
Forum: maintenance & nonperformance 02-05-2021, 05:49 PM
Replies: 5
Views: 565
Posted By bobxyz
The little cable taps off the part of the main...

The little cable taps off the part of the main speedo that turns the cogs. If the little cable is jammed, it can jam the main cogs too.
Forum: maintenance & nonperformance 02-05-2021, 05:13 PM
Replies: 5
Views: 565
Posted By bobxyz
There's a small speedo-like cable off the back of...

There's a small speedo-like cable off the back of the speedometer that originally goes to a little black box to turn on the Lambda light every 10Kmiles (or whatever the service interval is). Most of...
Forum: performance & modifications 02-04-2021, 07:23 PM
Replies: 32
Views: 2,243
Posted By bobxyz
The JimStim board is a simple engine simulator. ...

The JimStim board is a simple engine simulator. It has a bunch of knobs to control the RPM, temperatures, throttle position, AFR. On the desktop, you can open up Tuner Studio (the tuning software...
Forum: performance & modifications 02-04-2021, 12:25 AM
Replies: 32
Views: 2,243
Posted By bobxyz
The easiest choice would be a MicroSquirt with a...

The easiest choice would be a MicroSquirt with a 8' harness, and an external GM MAP sensor. If you're good at soldering and building electronic kits, you could get a MegaSquirt-II PCB 3.0 kit and a...
Forum: aftermarket engine management 02-01-2021, 03:08 PM
Replies: 15
Views: 2,619
Posted By bobxyz
For cranking versus test modes, there's a dwell...

For cranking versus test modes, there's a dwell setting for each - without out looking it up, 3ms should be a good enough starting point for the D585 Yukon heatsinked coils. Also, make sure you get...
Forum: maintenance & nonperformance 01-30-2021, 07:22 PM
Replies: 53
Views: 4,551
Posted By bobxyz
Do the high beams flash when you pull back on the...

Do the high beams flash when you pull back on the turn signal stalk?

In addition to the high/low step relay, there's a separate cube relay that provides power for the low beams. Find the TP31054...
Forum: maintenance & nonperformance 01-30-2021, 03:03 PM
Replies: 53
Views: 4,551
Posted By bobxyz
Yes, measure the voltage at the radio connector. ...

Yes, measure the voltage at the radio connector. To check for a broken radio ground wire, measure both the voltage across +12v and Ground pins on the radio connector, and then measure the +12v pin...
Forum: aftermarket engine management 01-30-2021, 02:58 PM
Replies: 15
Views: 2,619
Posted By bobxyz
I haven't used one of these, but from here:...

I haven't used one of these, but from here: http://jbperf.com/dual_VR/v2_1.html
"The board can also be used with Hall or opto sensors. In that case, the sensor is connected to VR+ only and VR- is...
Forum: aftermarket engine management 01-28-2021, 10:18 AM
Replies: 26
Views: 2,454
Posted By bobxyz
I checked my short MS harness at home and it does...

I checked my short MS harness at home and it does NOT have the CAS (VR1,VR2) shields connected to sensor ground within the connector/shrinkwrap. I must have been mistaken, or was thinking of a...
Forum: aftermarket engine management 01-27-2021, 02:07 PM
Replies: 26
Views: 2,454
Posted By bobxyz
I have a microsquirt with the short harness on...

I have a microsquirt with the short harness on the shelf at home - I'll check the shield ground tonight. If I remember, the shielded tach/cas cable is just cut off flush on a brand new harness, and...
Forum: aftermarket engine management 01-27-2021, 11:57 AM
Replies: 26
Views: 2,454
Posted By bobxyz
I just realized where some of the problem may be....

I just realized where some of the problem may be. In most cases, shield grounds should only be connected at one end. If you're using the pre-made MicroSquirt harness, then the CAS shield ground is...
Forum: aftermarket engine management 01-26-2021, 11:29 PM
Replies: 26
Views: 2,454
Posted By bobxyz
Assuming you mean the coil and wb "logic...

Assuming you mean the coil and wb "logic ground"s, that should be fine. Connecting anything that draws high current to the sensor ground wire(s) is bad. So is running the sensor ground to anything...
Forum: maintenance & nonperformance 01-26-2021, 11:01 PM
Replies: 53
Views: 4,551
Posted By bobxyz
^^^ those measurements are a bit on the low side,...

^^^ those measurements are a bit on the low side, but at 12.5ish volts, and above, the alternator is keeping up with the load. It is a 35 year old car with an alternator sized for that era.

After...
Forum: maintenance & nonperformance 01-26-2021, 03:03 PM
Replies: 13
Views: 824
Posted By bobxyz
The pins are just a snug fit. The cover pushes...

The pins are just a snug fit. The cover pushes on over them. Can you see a gasket between the cover and the block? If someone RTV'd it on, it may be difficult to get off.

When you whack the...
Forum: maintenance & nonperformance 01-26-2021, 02:31 PM
Replies: 13
Views: 824
Posted By bobxyz
Check the oil pan bolts - I forget if any of them...

Check the oil pan bolts - I forget if any of them go into the cover.

And yes, there are a couple locating pins. You can see them in your picture - they look like a bolt hole in the cover, but...
Forum: aftermarket engine management 01-25-2021, 09:56 PM
Replies: 26
Views: 2,454
Posted By bobxyz
If it's easy, can you measure a few voltages on...

If it's easy, can you measure a few voltages on the sensors at idle? Clip one meter lead to the ground bolt on the intake manifold, then measure:
- battery - post
- MAP ground pin
- TPS ground...
Forum: maintenance & nonperformance 01-25-2021, 09:50 AM
Replies: 53
Views: 4,551
Posted By bobxyz
I suggested radio connections due to the radio...

I suggested radio connections due to the radio and headlights turning on under high acceleration - I'm thinking extra vibration (and maybe the engine is leaning over a little more, tugging on some...
Forum: maintenance & nonperformance 01-24-2021, 11:41 PM
Replies: 53
Views: 4,551
Posted By bobxyz
The voltage drop tests seem good. When you had...

The voltage drop tests seem good. When you had the alternator tested, and they said bad regulator, did they give you any sort of printout with more details? I think the old Volvo alternators only...
Forum: aftermarket engine management 01-24-2021, 11:26 PM
Replies: 26
Views: 2,454
Posted By bobxyz
Looking just at the logs, the MAP sensor is fine...

Looking just at the logs, the MAP sensor is fine for a long time and then pegs at max pressure, which causes the ECU to command lots more fuel, which, I'm assuming, floods the engine and it stalls.
...
Forum: aftermarket engine management 01-24-2021, 02:05 PM
Replies: 26
Views: 2,454
Posted By bobxyz
Off hand, I can't think of a way that the ECU...

Off hand, I can't think of a way that the ECU would be putting out over 5v while still working and still logging normal voltages on the battery. I'll look at the schematics tonight.

Inside the...
Forum: aftermarket engine management 01-23-2021, 06:07 PM
Replies: 26
Views: 2,454
Posted By bobxyz
Hmmm, next, I'd try wiggling the MAP wires at...

Hmmm, next, I'd try wiggling the MAP wires at idle and see if you can get it to misbehave.

I don't think that the +5v Vref wire is shorting out to +12 because it's used by the TPS too, and I...
Forum: aftermarket engine management 01-23-2021, 05:23 PM
Replies: 26
Views: 2,454
Posted By bobxyz
Seeing more than 5v on the 5v reference is bad...

Seeing more than 5v on the 5v reference is bad and so is more than 5v out of the MAP (the MAP only gets +5v for power). Where did you measure the 7v, specifically, where were the 2 meter probes? ...
Forum: article composition 01-21-2021, 09:40 PM
Replies: 33
Views: 32,182
Posted By bobxyz
That's funny. I just looked at my unassembled...

That's funny. I just looked at my unassembled board and there's a big fat trace connecting those 2 holes on the other side of the board. So, the instructions are confused and yes, there should be...
Forum: performance & modifications 01-19-2021, 08:24 PM
Replies: 4
Views: 1,069
Posted By bobxyz
146 is for B230F No EGR 149 is for B230FT EGR ...

146 is for B230F No EGR
149 is for B230FT EGR
You can chip either one. Keep the original chip, if it matches your motor, as a backup.
Forum: maintenance & nonperformance 01-19-2021, 12:50 AM
Replies: 5
Views: 1,011
Posted By bobxyz
Check the ECU/EZK fuse, and R&R the main relay. ...

Check the ECU/EZK fuse, and R&R the main relay. Maybe you have low +12volts on both boxes. You could also check continuity on the 2nd ECU ground, pin 17.
Forum: maintenance & nonperformance 01-17-2021, 06:22 PM
Replies: 53
Views: 4,551
Posted By bobxyz
Easiest is to use a good wire stripper on the old...

Easiest is to use a good wire stripper on the old wire and see which notch fits best -- you want the insulation to be cleanly cut (no pulling hard to tear the remaining bits) but none of the strands...
Forum: maintenance & nonperformance 01-16-2021, 03:18 PM
Replies: 53
Views: 4,551
Posted By bobxyz
The burnt up alternator-to-block wire acted as a...

The burnt up alternator-to-block wire acted as a fusible link and hopefully protected the rest of the wiring. Get a good alternator in there, charge up the battery, and see if it then behaves...
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