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Search: Posts Made By: bobxyz
Forum: website & board 05-13-2022, 07:32 PM
Replies: 41
Views: 785
Posted By bobxyz
Thanks Dana, I was going through major withdrawal...

Thanks Dana, I was going through major withdrawal symptoms without my daily+ tbricks fix. :wave:

And I guess what happened in Vegas, may stay in Vegas.
Forum: maintenance & nonperformance 03-21-2022, 10:03 PM
Replies: 11
Views: 537
Posted By bobxyz
Call your local copy shop and ask them if they...

Call your local copy shop and ask them if they can print color transparencies, and if so, how much $ per 8.5 x 11 sheet?
Forum: maintenance & nonperformance 03-18-2022, 04:48 PM
Replies: 9
Views: 831
Posted By bobxyz
IIRC, I had some new pads in a red/black box that...

IIRC, I had some new pads in a red/black box that were too big. It took a while to figure out why it wouldn't go back together, but was obvious when I tried assembling the loose parts into a rotor...
Forum: maintenance & nonperformance 03-16-2022, 07:50 PM
Replies: 6
Views: 667
Posted By bobxyz
I have no idea what that would be on a '76, and...

I have no idea what that would be on a '76, and with only 1 wire connected, it's not doing anything. The CIS Constant Idle Speed box that was added in ~'82 uses a microswitch on the throttle...
Forum: aftermarket engine management 03-16-2022, 07:45 PM
Replies: 5
Views: 526
Posted By bobxyz
Inrush current is mostly an issue when driving...

Inrush current is mostly an issue when driving big capacitive loads or driving motors -- for the motors, once up to speed, the back EMF greatly reduces the effective voltage and current available to...
Forum: performance & modifications 03-16-2022, 07:34 PM
Replies: 19
Views: 1,634
Posted By bobxyz
Thanks, I didn't realize that it would be so...

Thanks, I didn't realize that it would be so easy, and especially that the distributor hold down is a good enough location for a 2nd knock sensor -- I was expecting that the sensor needed to be on...
Forum: aftermarket engine management 03-16-2022, 02:29 PM
Replies: 5
Views: 526
Posted By bobxyz
You can just measure the resistance of a stock...

You can just measure the resistance of a stock injector and calculate the per-injector steady-state current. For example, say that the injector is 2.5 ohms. This, plus a 7.5ohm resistor in the 4x...
Forum: maintenance & nonperformance 03-16-2022, 02:22 PM
Replies: 11
Views: 878
Posted By bobxyz
^^^ First, check the connection to the...

^^^ First, check the connection to the temperature sensor in the engine compartment (you'll need to find which one is for CIS idle).

Next, check the connector to the CIS box (in passenger...
Forum: performance & modifications 03-14-2022, 02:45 PM
Replies: 19
Views: 1,634
Posted By bobxyz
The audio file worked fine for me. The pinging...

The audio file worked fine for me. The pinging is surprisingly easy to hear with your setup - where did you get it? Once I have some spare time, I want to open your mp3 in audacity (now at...
Forum: performance & modifications 03-08-2022, 12:50 AM
Replies: 5
Views: 966
Posted By bobxyz
I'm not familiar with Niehoff regulators for a...

I'm not familiar with Niehoff regulators for a generator, but I'd guess the connections should be:
ARM (armature) to generator D+ bolt
FLD (field) to generator DF bolt
BAT (battery) to...
Forum: performance & modifications 03-04-2022, 09:35 PM
Replies: 5
Views: 966
Posted By bobxyz
FYI: Greenbook...

FYI: Greenbook TP10867-1_1974_140_section_3_electrical.pdf (ozvolvo.org/archive/) has wiring info for several different alternator and external regulator combos. Maybe one of them is close enough to...
Forum: maintenance & nonperformance 03-03-2022, 09:59 AM
Replies: 98
Views: 9,636
Posted By bobxyz
The IAC should be plumbed as a bypass path around...

The IAC should be plumbed as a bypass path around the throttle body - from the intake hose, through the IAC, to the plenum chamber in the intake manifold. If it's plumbed correctly, and there are no...
Forum: performance & modifications 02-28-2022, 09:57 AM
Replies: 9
Views: 1,363
Posted By bobxyz
^^^ LH2.2 uses a "dumb" powerstage too. For...

^^^ LH2.2 uses a "dumb" powerstage too.

For a description of LH2.2/LH2.4 Knock detection, see pg 28 of TP31397 (ozvolvo.org/archive)
Forum: performance & modifications 02-27-2022, 06:03 PM
Replies: 11
Views: 1,637
Posted By bobxyz
The LH2.4 "fuel pump" relay is actually a dual...

The LH2.4 "fuel pump" relay is actually a dual relay in one box -- it contains a main relay (for ECU/Injectors/MAF/IAC) and a fuel pump relay (for fuel pump and WBO2).

The MicroSquirt should be...
Forum: maintenance & nonperformance 02-24-2022, 08:49 PM
Replies: 24
Views: 1,496
Posted By bobxyz
Thanks, I was trying to envision a normal lathe...

Thanks, I was trying to envision a normal lathe with some sort of weird eccentric tool holder that would go in and out as the piston turns. Instead, it's a back and forth motion over a limited...
Forum: maintenance & nonperformance 02-24-2022, 03:39 PM
Replies: 24
Views: 1,496
Posted By bobxyz
Out of curiosity, how does knurling a piston...

Out of curiosity, how does knurling a piston work?
- Do you knurl the whole surface, or just the lower portion?
- Pistons aren't perfectly round - is there a way to knurl uniformly, or do the wide...
Forum: performance & modifications 02-23-2022, 12:11 AM
Replies: 11
Views: 1,637
Posted By bobxyz
OK, I think you're trying to wire in the extra 4...

OK, I think you're trying to wire in the extra 4 (or 5) pin cube relay needed for a MS PNP setup. I don't know what cube relay pins Kenny uses, but this may help.

You need to ground LH ECU pin 21...
Forum: performance & modifications 02-22-2022, 04:00 PM
Replies: 11
Views: 1,637
Posted By bobxyz
You're not making much sense. Are you trying to...

You're not making much sense. Are you trying to use the stock FP relay with microsquirt or are you trying to use additional relays instead of the stock FP relay or something else? The stock FP...
Forum: maintenance & nonperformance 02-20-2022, 09:54 PM
Replies: 5
Views: 779
Posted By bobxyz
See pdf pg 18 of: TP31058_1 1987 740 760 Wiring...

See pdf pg 18 of: TP31058_1 1987 740 760 Wiring Diagrams.pdf (http://borich.lesnoe.spb.ru/auto/Volvo/GreenBooks/WiringDiagrams/TP31058:1%201987%20740%20760%20Wiring%20Diagrams.pdf)
Forum: performance & modifications 02-18-2022, 06:46 PM
Replies: 4
Views: 1,281
Posted By bobxyz
The excessive TD04 turbo guide ®™:...

The excessive TD04 turbo guide ®™: http://forums.turbobricks.com/showthread.php?t=359871 (http://forums.turbobricks.com/showthread.php?t=359871)
thelostartof writeup on reclocking:...
Forum: performance & modifications 02-17-2022, 03:00 PM
Replies: 14
Views: 1,960
Posted By bobxyz
I thought the Volvo one was 4 wires. If it's 3...

I thought the Volvo one was 4 wires. If it's 3 wires, it's a type 1) 0-1v output with a 1volt reference inside the sensor. This would match your ECM <5mV measurement with the sensor disconnected.
...
Forum: performance & modifications 02-17-2022, 12:09 PM
Replies: 14
Views: 1,960
Posted By bobxyz
^^^ That's a great overview. Buried inside...

^^^ That's a great overview. Buried inside you'll find that there are at least 3 different styles of Titania sensors:
1) 3-wire with a 0-to-1 volt output
2) 4-wire with a 0-to-1 volt output
3)...
Forum: aftermarket engine management 02-16-2022, 08:00 PM
Replies: 3
Views: 1,374
Posted By bobxyz
It's been ages since I actually futzed with the...

It's been ages since I actually futzed with the EGO tuning, but I think I disabled it at idle (some sort of RPM > 9xx setting), and manually tuned it around idle. I'd use the auto-tune results as...
Forum: maintenance & nonperformance 02-14-2022, 11:59 PM
Replies: 21
Views: 2,303
Posted By bobxyz
The ECU grounds the injectors to turn them on. ...

The ECU grounds the injectors to turn them on. When unenergized, you'll see +12v on both sides.


The clear stuff is "conformal coating" (see wikipedia) and is there to protect the circuits from...
Forum: performance & modifications 02-11-2022, 07:53 PM
Replies: 14
Views: 1,960
Posted By bobxyz
I don't know if the AFR/voltage curve is...

I don't know if the AFR/voltage curve is configurable with the AEM WB02 sensors. With Innovate sensors, there's a good chance that it can be configured to emulate a 0-to-5v Titania narrowband...
Forum: performance & modifications 02-11-2022, 03:18 PM
Replies: 14
Views: 1,960
Posted By bobxyz
The last few pages of this 1980 Ford Motor Co...

The last few pages of this 1980 Ford Motor Co European patent shows some example response and resistance curves (it's my brief lunch break so sorry, I'm not going to clip, host, and embed the graphs...
Forum: maintenance & nonperformance 02-10-2022, 11:27 PM
Replies: 98
Views: 9,636
Posted By bobxyz
This Walker O2 Sensor catalog lists 740 and 940...

This Walker O2 Sensor catalog lists 740 and 940 Regina sensors, plus a "universal" option for those sensors:
...
Forum: maintenance & nonperformance 02-09-2022, 10:59 PM
Replies: 11
Views: 995
Posted By bobxyz
How often is the car driven? You may just be...

How often is the car driven? You may just be seeing the alternator recharging the battery after starting and not being driven for a while, or maybe a battery that's starting to go south. Probably a...
Forum: maintenance & nonperformance 02-09-2022, 05:09 PM
Replies: 4
Views: 755
Posted By bobxyz
Did you use the below parts from the '92 940...

Did you use the below parts from the '92 940 Turbo on your 240, or did you reuse some 240 NA parts?
- injectors, injector resistor pack, ECU, EZK

Before pulling the starter, set the engine to...
Forum: maintenance & nonperformance 02-08-2022, 01:12 PM
Replies: 13
Views: 2,039
Posted By bobxyz
Simplest guess would be a burnt out headlight...

Simplest guess would be a burnt out headlight bulb (just the low beam filament).

If it's not this, I'd examine/clean the connector.

[edit, sorry I was looking at the wrong wire] The low beam...
Forum: maintenance & nonperformance 02-07-2022, 08:18 PM
Replies: 98
Views: 9,636
Posted By bobxyz
Here's a couple log excerpts showing the LH2.4...

Here's a couple log excerpts showing the LH2.4 IAC behavior, with fuel cut, when
1) getting off the highway with upwards sloping offramp and foot off the gas, swept turn to right, stoplight,...
Forum: maintenance & nonperformance 02-07-2022, 12:06 AM
Replies: 98
Views: 9,636
Posted By bobxyz
That's great measurements, thanks! As a guess,...

That's great measurements, thanks! As a guess, based on late 80's 8-bit processor technology, I'd say that the normal PWM% operating ranges in firmware for the 2 valves is roughly:
- PWM 15% to...
Forum: maintenance & nonperformance 02-05-2022, 12:24 PM
Replies: 22
Views: 1,336
Posted By bobxyz
Guess I walked into that one :lol: Parody...

Guess I walked into that one :lol:

Parody of most jobs: https://www.youtube.com/watch?v=IxgyaQdr7c4 (you really need to use 2 good and well braced wrenches)
Forum: maintenance & nonperformance 02-04-2022, 07:09 PM
Replies: 22
Views: 1,336
Posted By bobxyz
Is my memory playing tricks on me (again)? It is...

Is my memory playing tricks on me (again)? It is a Friday... My memory is that the outer nut is part of the oil pan and that the inner nut is the one that turns?
Forum: maintenance & nonperformance 02-03-2022, 12:38 PM
Replies: 98
Views: 9,636
Posted By bobxyz
The on-off-on refers to the slightly open LH2.4...

The on-off-on refers to the slightly open LH2.4 valve when no power is applied (limp mode). As PWM% increases and the valve rotates, it first closes (off) and then the other side of the shutter...
Forum: maintenance & nonperformance 02-02-2022, 03:51 PM
Replies: 21
Views: 1,736
Posted By bobxyz
If it's idling at 750, the TPS is probably OK. ...

If it's idling at 750, the TPS is probably OK. You could at least check that it clicks going on/off idle.
Forum: maintenance & nonperformance 02-02-2022, 03:41 PM
Replies: 21
Views: 1,736
Posted By bobxyz
Is the TPS idle switch adjusted correctly? What...

Is the TPS idle switch adjusted correctly? What RPM is it idling at?

Either one might result in more advance that expected. The knock sensor should only Retard timing, and even then, it only...
Forum: maintenance & nonperformance 02-01-2022, 10:23 AM
Replies: 98
Views: 9,636
Posted By bobxyz
I'd just try the LH2.4 valve after adjusting the...

I'd just try the LH2.4 valve after adjusting the linkage correctly and/or pinching off the IAC hose and adjusting the idle speed to well below normal, say 500rpm. Even though the valve behavior is...
Forum: aftermarket engine management 02-01-2022, 10:18 AM
Replies: 2
Views: 945
Posted By bobxyz
Yes, 1K (1000 ohms) to +5volts is normal. If...

Yes, 1K (1000 ohms) to +5volts is normal. If you're good at soldering small parts, the resistors can be added to the connector pin stubs within the MicroSquirt box.
Forum: performance & modifications 02-01-2022, 10:14 AM
Replies: 2
Views: 1,305
Posted By bobxyz
The factory NA injectors are 16ohm impedance, so...

The factory NA injectors are 16ohm impedance, so 4 in parallel is 4 ohms. The driver transistor probably pulls down to ~2volts, so in rough terms, 14volts out of alternator minus 2 volts = 12 volts...
Forum: performance & modifications 01-30-2022, 11:44 PM
Replies: 197
Views: 21,115
Posted By bobxyz
Here's a link to a Compression Testing Tutorial...

Here's a link to a Compression Testing Tutorial that explains why the simple CR*atmospheric pressure doesn't match the measured PSI:...
Forum: performance & modifications 01-30-2022, 11:18 PM
Replies: 8
Views: 1,488
Posted By bobxyz
I went through some of this 5+ years ago but the...

I went through some of this 5+ years ago but the details have become rather fuzzy in my memory. I did re-host the pictures from one of my old posts here...
Forum: aftermarket engine management 01-28-2022, 10:06 AM
Replies: 8
Views: 1,484
Posted By bobxyz
Be careful with the WB02 wiring - the better ones...

Be careful with the WB02 wiring - the better ones have separate +12v/Ground wires for heater power and another set for sensor power. The heater power turns on and off rapidly (PWM) to maintain a...
Forum: performance & modifications 01-27-2022, 01:21 AM
Replies: 43
Views: 3,270
Posted By bobxyz
I don't see these problems with my rebuilt B21FT...

I don't see these problems with my rebuilt B21FT that's been converted to LH2.4 ('937 ECU / '148 EZK, 15G @ ~8psi), and I'm pretty fussy about how I expect the engine to run. I can only remember...
Forum: maintenance & nonperformance 01-26-2022, 08:32 PM
Replies: 21
Views: 2,303
Posted By bobxyz
Google for: biodegradable wiring...

Google for: biodegradable wiring site:turbobricks.com
For example, here's what the door lock actuator looked like in my '85:...
Forum: performance & modifications 01-25-2022, 04:33 PM
Replies: 43
Views: 3,270
Posted By bobxyz
LH2.4 keeps the IAC open at all times and adjusts...

LH2.4 keeps the IAC open at all times and adjusts the opening up and down as the rpm/load change. It also bumps up the IAC by ~5% when the A/C kicks on (not shown below).

Here's a graph of '937...
Forum: maintenance & nonperformance 01-24-2022, 08:51 PM
Replies: 7
Views: 1,240
Posted By bobxyz
Yes. Is the engine still in the car? If...

Yes.

Is the engine still in the car? If not, you can mark where the CPS is on the engine, remove the CPS, mate up engine&tranny, and transfer marks to tranny. Or use a paper template to...
Forum: maintenance & nonperformance 01-23-2022, 11:34 PM
Replies: 7
Views: 1,240
Posted By bobxyz
From my conversion to LH2.4 (click for bigger): ...

From my conversion to LH2.4 (click for bigger):
- You'll need to notch your transmission to clear the CPS - if not pre-notched, you can cut out and file the CPS notch in the older bell housing. Not...
Forum: maintenance & nonperformance 01-23-2022, 01:35 PM
Replies: 26
Views: 2,529
Posted By bobxyz
Glad it's working again. I'm still curious what...

Glad it's working again. I'm still curious what failed so, if you haven't gone cathartic caveman on it already, I'll give you $30 shipped for the old broken one, and I'll post what I find.
-Bob
Forum: maintenance & nonperformance 01-20-2022, 01:12 PM
Replies: 20
Views: 1,650
Posted By bobxyz
Sam hasn't been lurking in the shadows with a box...

Sam hasn't been lurking in the shadows with a box of alka-seltzer, a half full jug of used antifreeze, and a big grin has he?
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