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Search: Posts Made By: bobxyz
Forum: performance & modifications Today, 04:43 PM
Replies: 21
Views: 107
Posted By bobxyz
If I were to design a rudimentary immobilizer,...

If I were to design a rudimentary immobilizer, I'd wire it into the Park/Neutral interlock switch and make the ECU not inject fuel unless in Park/Neutral. I have no idea if this is what Volvo did.
...
Forum: performance & modifications Today, 04:13 PM
Replies: 21
Views: 107
Posted By bobxyz
I don't think the injectors care which way...

I don't think the injectors care which way they're wired, but I'm not sure on this. Gn/Wt is ECU wire. R-Blk was original NA +12v wire, replaced with 4x green wires to r-pack.

Have you checked...
Forum: performance & modifications Today, 02:22 PM
Replies: 21
Views: 107
Posted By bobxyz
I found a Late 93 diagram with the 24 pin...

I found a Late 93 diagram with the 24 pin connector, but I think the first 11 pins are the same as the 92.

Pin3 should be yel/red power from the main relay in the engine harness to the fuel pumps....
Forum: performance & modifications Today, 01:12 PM
Replies: 21
Views: 107
Posted By bobxyz
I don't have my notes here, so this is from...

I don't have my notes here, so this is from memory (perhaps faulty).

The first output diag may be fuel pump on/off.

You're running with brake cleaner so you're getting good CPS readings and EZK...
Forum: performance & modifications Today, 11:56 AM
Replies: 21
Views: 107
Posted By bobxyz
The original injector wire from the ECU in the...

The original injector wire from the ECU in the harness grounds all 4 injectors simultaneously. You need to keep that wiring intact. The original NA injectors then have the other side wired to +12v....
Forum: maintenance & nonperformance 11-17-2018, 02:31 PM
Replies: 49
Views: 4,409
Posted By bobxyz
It looks like you're tapped into power for the...

It looks like you're tapped into power for the passenger side power windows. This is a poor place to use - from the ignition switch, it goes through a fuse and through the main power window relay. ...
Forum: maintenance & nonperformance 11-17-2018, 01:33 PM
Replies: 49
Views: 4,409
Posted By bobxyz
Seeing your pictures, and re-reading your posts,...

Seeing your pictures, and re-reading your posts, I misunderstood your setup. I thought you were still using the original LH ECU and Ignition setup, with a piggyback MS3x. Instead, you're using only...
Forum: maintenance & nonperformance 11-16-2018, 03:23 PM
Replies: 49
Views: 4,409
Posted By bobxyz
Try removing your MS3x relays, and your AC relay...

Try removing your MS3x relays, and your AC relay (right side of console) and see if the symptoms change.

Assuming the '87 USA greenbook is similar to your wiring, and that it's intact and...
Forum: maintenance & nonperformance 11-16-2018, 01:24 PM
Replies: 49
Views: 4,409
Posted By bobxyz
Please post a diagram of your MS3x relay...

Please post a diagram of your MS3x relay connections. I'm wondering if you have some weird backwards power path that provides enough voltage on the switched +12 wire after turning the ignition off...
Forum: maintenance & nonperformance 11-10-2018, 02:30 PM
Replies: 17
Views: 3,010
Posted By bobxyz
I'd remove the dash and cut the top. Here's a...

I'd remove the dash and cut the top. Here's a picture of a PO's replacement in a 85 box and an unmolested 93 box (click for full size). The silver is HVAC foil tape:...
Forum: maintenance & nonperformance 11-10-2018, 10:50 AM
Replies: 6
Views: 284
Posted By bobxyz
There's 3 wires that come from the relays in the...

There's 3 wires that come from the relays in the center console through the door hinge area to the switches in the door. Red/Green/Black. One is ground (I'd think black but I don't have the wiring...
Forum: maintenance & nonperformance 11-09-2018, 11:48 PM
Replies: 6
Views: 284
Posted By bobxyz
The pull knob and the key lock are two different...

The pull knob and the key lock are two different switches, but wired together in the door. See pics at: http://forums.turbobricks.com/showthread.php?t=322700 or...
Forum: performance & modifications 11-07-2018, 09:48 AM
Replies: 12
Views: 732
Posted By bobxyz
remove the resistor pack, or replace it with a...

remove the resistor pack, or replace it with a shorting plug
Forum: aftermarket engine management 11-07-2018, 09:46 AM
Replies: 13
Views: 307
Posted By bobxyz
Yes, that's all that's needed for a v2.2 PCB. ...

Yes, that's all that's needed for a v2.2 PCB. See: https://www.diyautotune.com/product/megasquirt-pwm-iac-valve-control-tip120-39mod-kit-39/
Forum: performance & modifications 11-06-2018, 12:08 AM
Replies: 12
Views: 732
Posted By bobxyz
"Coil Resistance: 12 Ohms (This high-impedance...

"Coil Resistance: 12 Ohms (This high-impedance injector will work with all factory ECM/PCM injector drivers)"

You should use the factory 240 wiring without a resistor pack. If you've already...
Forum: aftermarket engine management 11-06-2018, 12:04 AM
Replies: 13
Views: 307
Posted By bobxyz
^^^ oops, you're right, my mistake. I must have...

^^^ oops, you're right, my mistake. I must have been thinking of the drive transistor for the boost solenoid. I wonder why they recommend two different parts and circuits for similar air valves?
Forum: aftermarket engine management 11-05-2018, 03:19 PM
Replies: 13
Views: 307
Posted By bobxyz
That's a recirculation or flyback diode. It...

That's a recirculation or flyback diode. It allows the current going through the IAC coil to recirculate and die off more slowly when the drive current from the transistor shuts off. I've seen...
Forum: maintenance & nonperformance 11-03-2018, 07:58 PM
Replies: 1
Views: 244
Posted By bobxyz
LH2.4 engine harness routing and clamps

I can't seem to find my pictures from when I pulled the engine harness from a '93 240. Does anyone have some pictures that show the routing, and clamps, for the harness?

Alternately, can you...
Forum: maintenance & nonperformance 11-03-2018, 12:53 PM
Replies: 8
Views: 427
Posted By bobxyz
Not all ECUs can drive the fan relays. The 937...

Not all ECUs can drive the fan relays. The 937 can, the 951 can't. If you open it up, there should be a ~1/2" x ~1/2" square black chip roughly between the heatsink bar and the connector. If this...
Forum: maintenance & nonperformance 11-03-2018, 12:47 PM
Replies: 41
Views: 1,852
Posted By bobxyz
Edited: See this post for a picture of rotor and...

Edited: See this post for a picture of rotor and alignment notch when at TDC, and pictures showing TDC marks....
Forum: maintenance & nonperformance 11-01-2018, 10:57 PM
Replies: 22
Views: 567
Posted By bobxyz
eeuroparts.com has them in different brands. The...

eeuroparts.com has them in different brands. The old up to 84 parts catalog I looked at shows 381704 as the bushing for the U shaped yoke, and 666143 as the bushing for the other end with the L...
Forum: performance & modifications 11-01-2018, 02:20 PM
Replies: 12
Views: 732
Posted By bobxyz
You need to write down the bosch part number from...

You need to write down the bosch part number from your green injectors and then lookup the resistance, or impedance, specs for that part number. If they are high resistance, then the stock 240 NA...
Forum: maintenance & nonperformance 10-30-2018, 08:11 PM
Replies: 15
Views: 818
Posted By bobxyz
Thanks Simon, that's a very interesting picture. ...

Thanks Simon, that's a very interesting picture. Based on the large number of small parts visible on the top of the replacement hybrid module, and what the original module looked like, I'd guess...
Forum: maintenance & nonperformance 10-30-2018, 07:34 PM
Replies: 41
Views: 1,852
Posted By bobxyz
Somewhere earlier, cleanflametrap (Art) had a...

Somewhere earlier, cleanflametrap (Art) had a good suggestion of running a metal feeler gauge through the distributor sensor gap to trigger the coil. I think all you need to do is pull the disti cap...
Forum: performance & modifications 10-30-2018, 07:29 PM
Replies: 35
Views: 1,405
Posted By bobxyz
What's your piston protrusion? Can you use a...

What's your piston protrusion? Can you use a thinner head gasket for "tight squish" (look it up here if unsure), and get an adjustable cam gear to adjust for shaved head?


Oh, I'd assume those...
Forum: performance & modifications 10-30-2018, 02:28 PM
Replies: 35
Views: 1,405
Posted By bobxyz
Huh? I can't imagine how a head gasket leak...

Huh? I can't imagine how a head gasket leak would take out the exhaust gaskets. What brand exhaust gaskets are you using? Volvo and Elring look nice. Felpro is worse than re-using the old ones.
...
Forum: performance & modifications 10-29-2018, 02:24 PM
Replies: 19
Views: 1,886
Posted By bobxyz
The "it was running but now won't start" is...

The "it was running but now won't start" is sometimes due to a failing ignition module, especially if the injectors are still firing. I think you can put a test light on pin 5 of the module and see...
Forum: maintenance & nonperformance 10-27-2018, 12:47 AM
Replies: 15
Views: 818
Posted By bobxyz
Interesting project, but, unlike vintage Porsche...

Interesting project, but, unlike vintage Porsche owners, old Volvo Owners won't spend any $$$ to keep it original. Around here, a salvage yard ECU goes for only $14.99 ("Control Module"), plus 10%...
Forum: projects & restorations 10-26-2018, 04:15 PM
Replies: 2,358
Views: 232,241
Posted By bobxyz
^^^ Thanks John, that really helps make sense of...

^^^ Thanks John, that really helps make sense of the conflicting info I've seen -- why the flame trap housing with split big/small nipples is listed for B21FT, and why my old one had the small nipple...
Forum: maintenance & nonperformance 10-26-2018, 01:35 PM
Replies: 5
Views: 490
Posted By bobxyz
I finally got them installed but it sure wasn't...

I finally got them installed but it sure wasn't easy. I ended up drilling out the holes, just slightly, to 1/2", and de-burring/chamfering the edges. With lube, a block of wood, channel lock...
Forum: projects & restorations 10-26-2018, 01:26 PM
Replies: 2,358
Views: 232,241
Posted By bobxyz
I was looking at the turbo PCV system in detail...

I was looking at the turbo PCV system in detail while putting my '85 B21FT back together. The "flame trap" or "flame arrestor" is the mesh screen that prevents fire (e.g. intake manifold backfire)...
Forum: maintenance & nonperformance 10-25-2018, 02:39 PM
Replies: 5
Views: 490
Posted By bobxyz
installing rubber fuel pump isolator mounts

The under car fuel pump mounts on a plate using 3 rubber isolators. Is there some trick to installing those isolators? If it matters, turbo K-Jet with aftermarket (MT?) parts from IPD (Volvo #...
Forum: performance & modifications 10-18-2018, 07:18 PM
Replies: 24
Views: 936
Posted By bobxyz
This is an ugly 90+ manifold with factory studs...

This is an ugly 90+ manifold with factory studs and nuts sticking out (click for full size):
https://thumb.ibb.co/dTBLkb/90_Manifold_lots_o_cracks.jpg (https://ibb.co/dTBLkb)

This is a 15G turbo....
Forum: maintenance & nonperformance 10-18-2018, 04:34 PM
Replies: 41
Views: 1,852
Posted By bobxyz
I'm not sure it helps at all, but here's an easy...

I'm not sure it helps at all, but here's an easy to read wiring diagram for a similar Bosch 137 module in a Ferrari Dino: http://www.dinoplex.org/PDF/Wiring_Ferrari_Dino_246_Bosch_Optical_Pickup.pdf
Forum: maintenance & nonperformance 10-18-2018, 03:20 PM
Replies: 41
Views: 1,852
Posted By bobxyz
Thanks Art, K-Jet fueling with non-USA ignition...

Thanks Art, K-Jet fueling with non-USA ignition makes much more sense (the "couldn't find the MAF comment" should have been the clue).

The 139 ignition module connects directly to the distributor,...
Forum: maintenance & nonperformance 10-18-2018, 11:44 AM
Replies: 41
Views: 1,852
Posted By bobxyz
Now that I can see your pictures, I'm not sure...

Now that I can see your pictures, I'm not sure what ignition system you have. The distributor looks like a 3-pin LH2.2 distributor, but the Bosch 139 module is not the normal big Chrysler ignition...
Forum: maintenance & nonperformance 10-16-2018, 02:41 PM
Replies: 15
Views: 827
Posted By bobxyz
So the wires/connector coming out the side of the...

So the wires/connector coming out the side of the distributor have been clipped? If so, there is no hall signal going to the ignition module which means nothing to trigger the spark. Did they get...
Forum: maintenance & nonperformance 10-16-2018, 02:12 PM
Replies: 41
Views: 1,852
Posted By bobxyz
Hi Tom, welcome! If you have a connector &...

Hi Tom, welcome!

If you have a connector & wires coming out the side of the distributor, it's LH2.2. The LH2.4 setup uses flywheel teeth and a crank position sensor (CPS) instead of a hall...
Forum: maintenance & nonperformance 10-12-2018, 11:19 PM
Replies: 2
Views: 407
Posted By bobxyz
AW-71 Vent

https://image.ibb.co/m7KPip/aw-71-vent-nipple.jpg

Should there be a hose on this barbed plastic AW-71 vent nipple? If so, where should it go?

Thanks,
Bob
Forum: article composition 10-11-2018, 10:49 AM
Replies: 429
Views: 187,018
Posted By bobxyz
I think it's this socket pin for the Amp Junior...

I think it's this socket pin for the Amp Junior Timer series of connectors, but I haven't actually tried one:...
Forum: maintenance & nonperformance 10-02-2018, 12:17 AM
Replies: 16
Views: 856
Posted By bobxyz
Great CPR/WUR rebuilding link from highperfauto: ...

Great CPR/WUR rebuilding link from highperfauto:
https://forums.turbobricks.com/showpost.php?p=5834501&postcount=3

Try a google search for something like: "K-jet hot start problems...
Forum: projects & restorations 09-26-2018, 10:42 PM
Replies: 2,358
Views: 232,241
Posted By bobxyz
Did you replace and rewire the K-Jet fuel pump...

Did you replace and rewire the K-Jet fuel pump relay with a LH2.2 setup? If not, the red/white tach wire from the coil goes to the K-Jet fuel pump relay and turns on the pump when it sees cranking.
Forum: maintenance & nonperformance 09-26-2018, 05:24 PM
Replies: 61
Views: 2,590
Posted By bobxyz
It's simply a coil of wire around an iron core...

It's simply a coil of wire around an iron core plus a magnet. Measure the resistance when unplugged and compare to specs. If it's open circuit, it's bad. Much lower than spec resistance means that...
Forum: maintenance & nonperformance 09-26-2018, 05:16 PM
Replies: 4
Views: 400
Posted By bobxyz
You may have a stuck "step relay". It's the...

You may have a stuck "step relay". It's the double-wide silver relay a few inches behind the battery. Try wrapping on the step-relay with a screwdriver handle.

If that doesn't do it, you might...
Forum: maintenance & nonperformance 09-21-2018, 08:58 PM
Replies: 21
Views: 1,121
Posted By bobxyz
The 240 distributors have a slot that the...

The 240 distributors have a slot that the hold-down bolt goes through. This limits the rotation, and means that you need to get the drive gear alignment correct. If the B20F distributor has a...
Forum: maintenance & nonperformance 09-15-2018, 05:56 PM
Replies: 21
Views: 1,121
Posted By bobxyz
I don't know about B20s, but normally the...

I don't know about B20s, but normally the distributor rotor lines up with a notch or line on the edge of the distributor when at TDC. If the distributor drive gear is off a tooth, the rotor isn't...
Forum: maintenance & nonperformance 09-13-2018, 02:54 PM
Replies: 54
Views: 2,898
Posted By bobxyz
The ECU case does not ground through the mounting...

The ECU case does not ground through the mounting screws to the chassis -- you can test it floating in air. Measuring no voltage with key on is most likely from not getting good probe contact.

...
Forum: maintenance & nonperformance 09-13-2018, 12:26 PM
Replies: 54
Views: 2,898
Posted By bobxyz
The ECU supplies voltage, thru a resistor, for...

The ECU supplies voltage, thru a resistor, for the ECT. If ECU isn't plugged in, no voltage on ECT. Your 2.23 resistance reading seems fine.

There's a different ECT pin used by the EZK box. You...
Forum: maintenance & nonperformance 09-13-2018, 08:41 AM
Replies: 5
Views: 531
Posted By bobxyz
If you're just trying to test the coolant temp...

If you're just trying to test the coolant temp sensor, measure the resistance between the ect pin and a ground pin, at the connector, with connector unplugged and key off, and compare it to the chart...
Forum: maintenance & nonperformance 09-12-2018, 08:05 PM
Replies: 5
Views: 531
Posted By bobxyz
^^^ This. You'll need to unplug it first, and...

^^^ This. You'll need to unplug it first, and the shell slides off the end where you remove the screw. Careful, there are some wicked sharp plastic edges under the cover. You may need to remove...
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