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Forum: performance & modifications Today, 08:39 AM
Replies: 36
Views: 911
Posted By bobxyz
A couple more useful tidbits: There's...

A couple more useful tidbits:

There's excerpts from a Volvo Greenbook that describe Rex/Regina in detail at:
https://people.ohio.edu/ridgely/Volvo_docs/

This includes full pinout and signal...
Forum: performance & modifications Yesterday, 09:14 AM
Replies: 36
Views: 911
Posted By bobxyz
My best guess for the ignition box is: The...

My best guess for the ignition box is:

The ZC98902VP is another custom (mask rom) Motorola processor (VP=automotive rated 28-pin plastic pkg), probably a 6804 or 6805 family due to the smaller...
Forum: maintenance & nonperformance 07-14-2018, 04:40 PM
Replies: 24
Views: 569
Posted By bobxyz
There's a flex fuse shown just to the left of the...

There's a flex fuse shown just to the left of the white speedo housing in the above picture. It supplies 12volts from the 3-pin connector to the speedo and console. Try removing and cleaning the...
Forum: performance & modifications 07-14-2018, 04:17 PM
Replies: 36
Views: 911
Posted By bobxyz
Your pictures are much different that the chipped...

Your pictures are much different that the chipped Renix pictures I found.

I can decipher a little of your chip code, and can add some guesses too.

ZC407531VFN << this is a custom motorola CPU...
Forum: performance & modifications 07-13-2018, 07:39 PM
Replies: 36
Views: 911
Posted By bobxyz
The Motorola 68701 is the EPROM version of the...

The Motorola 68701 is the EPROM version of the 6801, a successor to the 6800 and a predecessor of the much better 68HC11....
Forum: maintenance & nonperformance 07-13-2018, 03:24 PM
Replies: 51
Views: 1,087
Posted By bobxyz
The plug wire resistance range was quoted from...

The plug wire resistance range was quoted from IPD. I checked a couple other places and a better check would be: all wires under 10,000 ohms resistance, and the plug wires fairly close to each...
Forum: maintenance & nonperformance 07-12-2018, 07:54 PM
Replies: 10
Views: 405
Posted By bobxyz
I'm not sure if it's the same, but Bentley has...

I'm not sure if it's the same, but Bentley has the specs for the 240 EGR w/ EZK116

pg 253-6 EGR vacuum booster 85 +/-10 ohms
Temp sensor at ambient 500-1000 ohms

[And I think the EZK code...
Forum: maintenance & nonperformance 07-11-2018, 10:17 PM
Replies: 51
Views: 1,087
Posted By bobxyz
Glad it's doing better. Next time you're at the...

Glad it's doing better. Next time you're at the salvage yard, find a spare set of plug wires, cap, rotor to throw in the trunk for luck -- the plug wires should measure around 1500 to 3000 ohms, or...
Forum: maintenance & nonperformance 07-11-2018, 09:39 PM
Replies: 3
Views: 235
Posted By bobxyz
There's a '93 240 greenbook at...

There's a '93 240 greenbook at volvowiringdiagrams too - it has a little more detail. If it's factory wired, I'd expect the connectors to be nearby where they need to go. Pull the handbrake console...
Forum: maintenance & nonperformance 07-11-2018, 12:03 AM
Replies: 51
Views: 1,087
Posted By bobxyz
Are you using the original K-Jet...

Are you using the original K-Jet mechanical+vacuum advance distributor? Maybe with the advance mechanism "fixed" in place? If so, there's a chance that the rotor alignment is off. An easy test is...
Forum: maintenance & nonperformance 07-10-2018, 07:47 PM
Replies: 51
Views: 1,087
Posted By bobxyz
It sure sounds like everything is fine to the end...

It sure sounds like everything is fine to the end of the coil wire, but goes bad somewhere between there and the spark plugs. How exactly are you testing to find the weak spark? Plug in a spare set...
Forum: maintenance & nonperformance 07-09-2018, 10:08 PM
Replies: 51
Views: 1,087
Posted By bobxyz
I'm pretty sure that if the center of the rotor...

I'm pretty sure that if the center of the rotor lines up with the notch on the housing at TDC, it's OK. Even if the drive gear is off a tooth, you'd need to rotate the housing by a tooth's worth to...
Forum: maintenance & nonperformance 07-09-2018, 07:27 PM
Replies: 10
Views: 547
Posted By bobxyz
If you're wiring all the way from the EZK to...

If you're wiring all the way from the EZK to within an inch of the CPS sensor body, then yes, you want to connect all 3 wires at the EZK but leave the shield/drain wire disconnected at the sensor...
Forum: maintenance & nonperformance 07-09-2018, 07:19 PM
Replies: 51
Views: 1,087
Posted By bobxyz
Any diag codes from the EZK after trying to run? ...

Any diag codes from the EZK after trying to run?

[And just to cover the bases, re-check your plug wires. 1-3-4-2 as the distributor rotor moves in a clockwise direction as viewed from above.]
Forum: maintenance & nonperformance 07-09-2018, 12:00 AM
Replies: 51
Views: 1,087
Posted By bobxyz
The easy test is to measure the voltage on the...

The easy test is to measure the voltage on the coil with key on, but not running. You should see very close to full battery voltage. If the ballast resistor is still in the circuit, voltage will be...
Forum: maintenance & nonperformance 07-08-2018, 10:12 PM
Replies: 51
Views: 1,087
Posted By bobxyz
Have you checked that the distributor drive shaft...

Have you checked that the distributor drive shaft is oriented correctly? If you take the cap off, there's a groove on the edge of the distributor body. The tip of the rotor should be ~centered over...
Forum: maintenance & nonperformance 07-07-2018, 02:29 PM
Replies: 17
Views: 1,938
Posted By bobxyz
See page 1 of the '93 940 diagrams here:...

See page 1 of the '93 940 diagrams here: http://www.volvowiringdiagrams.com/?dir=volvo/940%20Wiring%20Diagrams
The dashed box is LH2.4 only.
Forum: maintenance & nonperformance 07-05-2018, 07:47 PM
Replies: 10
Views: 547
Posted By bobxyz
Here's a link for shielded 2-wire cable: ...

Here's a link for shielded 2-wire cable: https://www.diyautotune.com/product/wire-2-core-shielded-22-gauge-10-39/

Or, you could try using a piece of USB 2.0 cable - the inner wires are pretty...
Forum: performance & modifications 07-05-2018, 07:42 PM
Replies: 102
Views: 3,676
Posted By bobxyz
That looks like you have a replacement AW71 from...

That looks like you have a replacement AW71 from a pre LH2.4 car that did not have the molded-in cutout notch for the CPS, and someone hacked out the CPS hole by hand. If you're lucky, it might have...
Forum: maintenance & nonperformance 07-03-2018, 09:02 AM
Replies: 6
Views: 384
Posted By bobxyz
Yes, as the experts have said, check fuse 6 (your...

Yes, as the experts have said, check fuse 6 (your brake lights are not working at all). Hopefully, it's just fuse contact corrosion or a cracked fuse. If it's blown, you may need to figure out what...
Forum: maintenance & nonperformance 07-03-2018, 12:18 AM
Replies: 6
Views: 384
Posted By bobxyz
That's certainly a strange one. I can't think of...

That's certainly a strange one. I can't think of anything simple that's common to the two circuits. Is everything working normally otherwise, specifically:
- brake lights work and are evenly...
Forum: maintenance & nonperformance 07-02-2018, 09:01 PM
Replies: 20
Views: 1,372
Posted By bobxyz
My transmission's still on the floor of the...

My transmission's still on the floor of the garage (lingering back problems, #*&!@*), and I knew where the extra gear assy was on the shelf, so it was easy to measure both. The total length of...
Forum: maintenance & nonperformance 07-02-2018, 06:43 PM
Replies: 20
Views: 1,372
Posted By bobxyz
Try this:...

Try this: http://www.forums.turbobricks.com/showthread.php?t=325518
or this: http://forums.turbobricks.com/showthread.php?t=272631

The shaft on the gear is different between auto and manual. I...
Forum: maintenance & nonperformance 07-01-2018, 07:52 PM
Replies: 16
Views: 733
Posted By bobxyz
Any fault codes from the EZK, or ECU? When...

Any fault codes from the EZK, or ECU? When trying to measure CPS voltage, are you using the AC voltage setting on the meter?
Forum: aftermarket engine management 06-28-2018, 12:50 AM
Replies: 11
Views: 878
Posted By bobxyz
Thanks! I'm still learning about tuning and I'll...

Thanks! I'm still learning about tuning and I'll file this one away as: "if the AFR doesn't match the PW, check the pump!"

Looking at your graph, the peak PW of 13.8ms and 6100rpm means that the...
Forum: performance & modifications 06-25-2018, 08:37 PM
Replies: 10
Views: 842
Posted By bobxyz
You want to drive the Volvo 240 speedo with an AC...

You want to drive the Volvo 240 speedo with an AC signal (it originally comes from a VR sensor, which is an AC signal). Looks like it's the "OUT1" pin on the Dakota box.

See:...
Forum: performance & modifications 06-24-2018, 07:35 PM
Replies: 13
Views: 970
Posted By bobxyz
Generating LH2.4 VSS from Cable Speedometer Cruise Sensor

The early 240s use a cable driven speedometer. When cruise control is installed, a VR sensor in the back of the cable driven speedometer is used. (click on pics for full size)
...
Forum: performance & modifications 06-23-2018, 12:53 PM
Replies: 16
Views: 820
Posted By bobxyz
The standard B230 LH2.4 temperature sensor is...

The standard B230 LH2.4 temperature sensor is actually 2 sensors in one housing. It has 2 pins and uses the block for the grounds. With LH2.4, one goes to the EZK box and one to the ECU box. ...
Forum: performance & modifications 06-22-2018, 12:26 AM
Replies: 13
Views: 970
Posted By bobxyz
Quick Update: I tried wiring the cruise VR...

Quick Update:
I tried wiring the cruise VR sensor from an early 80s cable speedo to a 91 (pre-ABS) speedo. It seems to be sensitive enough to detect the lower signal voltage from the cruise VR...
Forum: performance & modifications 06-21-2018, 11:22 PM
Replies: 13
Views: 970
Posted By bobxyz
On LH2.4 cars, the VR sensor on the rear...

On LH2.4 cars, the VR sensor on the rear differential goes to the speedometer. On the speedo is a circuit board that both drives the needle and generates the Vss signal used by the LH2.4 ECU. See...
Forum: maintenance & nonperformance 06-21-2018, 09:44 PM
Replies: 7
Views: 592
Posted By bobxyz
Firmly clogged cat? The only time I've seen...

Firmly clogged cat?

The only time I've seen hydrolock is from some doofus in a Jeep going through a wide stream over-and-over again. He got some impressive rooster tails of water before dying...
Forum: aftermarket engine management 06-19-2018, 08:47 PM
Replies: 6
Views: 883
Posted By bobxyz
You're referencing Amp connectors that may or may...

You're referencing Amp connectors that may or may not be fully compatible with the 30+ year old Bosch ECU/EZK connectors - you'd probably need to ask an Apps Engineer at TE to find out if they're...
Forum: maintenance & nonperformance 06-18-2018, 02:57 PM
Replies: 6
Views: 389
Posted By bobxyz
^^^ someone must have had too much fun this...

^^^ someone must have had too much fun this weekend....

LH2.2/EZK117 uses a pulse-per-cylinder hall sensor in the distributor. LH2.4/EZK116 uses a 60-2 flywheel and CPS. There's no way that...
Forum: performance & modifications 06-15-2018, 02:33 PM
Replies: 18
Views: 1,272
Posted By bobxyz
If you're not set on a Volvo 016 AMM, there are...

If you're not set on a Volvo 016 AMM, there are better options (newer technology). From the above ipdown.net link, there's a Bosch datasheet for a hot film, vs. hot wire, AMM. Quoting the...
Forum: performance & modifications 06-14-2018, 10:53 PM
Replies: 18
Views: 1,272
Posted By bobxyz
This saabnet link has some info on LH hotwire AMM...

This saabnet link has some info on LH hotwire AMM burn off: http://www.saabnet.com/tsn/faq/lhoverview.html


Edit: there's also a copy of a bosch datasheet calibration curve page for the 016 here:...
Forum: performance & modifications 06-13-2018, 05:19 PM
Replies: 42
Views: 2,020
Posted By bobxyz
[fwiw2 - There was also a '93 240 wagon in row 2...

[fwiw2 - There was also a '93 240 wagon in row 2 with the dashboard freshly removed, but fully intact blower & A/C, plus I think a good engine wiring harness, if you're thinking about an A/C upgrade....
Forum: performance & modifications 06-13-2018, 04:41 PM
Replies: 42
Views: 2,020
Posted By bobxyz
[fwiw - the '93 940 at the...

[fwiw - the '93 940 at the https://upullandpay.com/denver/search-inventory/ is a turbo, and was intact this last weekend, but I don't know if it's a squirter block.]
Forum: maintenance & nonperformance 06-11-2018, 10:24 PM
Replies: 13
Views: 681
Posted By bobxyz
Here's one thread - I don't know how accurate it...

Here's one thread - I don't know how accurate it is, or if enough pictures are still left:
LH 2.2 to EZK117 - My article addendum (http://forums.turbobricks.com/showthread.php?t=129382)
Forum: maintenance & nonperformance 06-10-2018, 11:52 PM
Replies: 13
Views: 681
Posted By bobxyz
I'd guess that it's a manufacturing defect. ...

I'd guess that it's a manufacturing defect. Staggered pins on connectors are only used when the connectors will be hot-swapped -- the longer pins are usually ground so that ground is connected...
Forum: maintenance & nonperformance 06-10-2018, 09:23 PM
Replies: 29
Views: 883
Posted By bobxyz
Are you sure you need to replace it? The CPS is...

Are you sure you need to replace it? The CPS is just a coil of wire around an iron core plus a magnet, so it's pretty reliable if kept dry. If the resistance measures close to spec, the sensor is...
Forum: maintenance & nonperformance 06-08-2018, 09:07 PM
Replies: 17
Views: 892
Posted By bobxyz
FYI - most cars, or at least anything after the...

FYI - most cars, or at least anything after the 1960s, use the alternator exciter wire to turn on multiple different console check lights before the engine is started. If only one bulb is burnt out,...
Forum: performance & modifications 06-06-2018, 07:41 PM
Replies: 9
Views: 722
Posted By bobxyz
I don't know if something like this would work -...

I don't know if something like this would work - http://www.dakotadigital.com/index.cfm/page/ptype=product/product_id=109/category_id=311/mode=prod/prd109.htm

Does your PCM box have a Vss input,...
Forum: performance & modifications 06-01-2018, 11:33 PM
Replies: 14
Views: 996
Posted By bobxyz
Lookup your tire size and find the revs/mile. ...

Lookup your tire size and find the revs/mile. For instance, 195-60R15's are 833 revs/mile.

https://tiresize.com/tiresizes/195-60R15.htm

Then multiply by the number of tone ring teeth (48 for...
Forum: performance & modifications 06-01-2018, 04:18 PM
Replies: 12
Views: 1,050
Posted By bobxyz
Just to be clear, it works OK, with and without...

Just to be clear, it works OK, with and without cutout, with the MBC but only works without cutout with EBC?

Where is your reference boost/vacuum hose for the EBC connected?
Forum: performance & modifications 05-30-2018, 10:22 PM
Replies: 26
Views: 1,562
Posted By bobxyz
Quick quiz: 1) By nature, are you curious how...

Quick quiz:
1) By nature, are you curious how things work?
2) Would you like to learn a lot more about modern engine management, fuel control, spark control, etc.?
3) Are you fussy about how the...
Forum: aftermarket engine management 05-30-2018, 10:02 PM
Replies: 19
Views: 1,323
Posted By bobxyz
Just to be clear, I'm not encouraging this, or at...

Just to be clear, I'm not encouraging this, or at least not on my engine....

Most likely, the LH tables don't support negative numbers -- they'll wrap around to big positive numbers.

I don't...
Forum: aftermarket engine management 05-24-2018, 09:46 PM
Replies: 32
Views: 1,972
Posted By bobxyz
I haven't seen that error before. DIYautotune is...

I haven't seen that error before. DIYautotune is your best bet. Or you could try posting in the TunerStudio section at msextra.com/forums.

Your setup looks OK, or at least it shows a "uS" for...
Forum: maintenance & nonperformance 05-23-2018, 10:26 PM
Replies: 18
Views: 819
Posted By bobxyz
I just looked on the 1st page of the '92 doc...

I just looked on the 1st page of the '92 doc here: http://www.volvowiringdiagrams.com/?dir=volvo/940%20Wiring%20Diagrams

and it shows a pair of pressure sensors in front of the radiator. Maybe...
Forum: aftermarket engine management 05-23-2018, 02:34 PM
Replies: 32
Views: 1,972
Posted By bobxyz
I think you're asking about changing the...

I think you're asking about changing the Tools->Calibrate... temperature,MAP,etc. values. To change these, you need to do a "Tools ->Un/Lock Calibrations" first. I don't know why MS treats these...
Forum: maintenance & nonperformance 05-20-2018, 04:25 PM
Replies: 3
Views: 471
Posted By bobxyz
The "Volvo 240 1991.pdf" at...

The "Volvo 240 1991.pdf" at volvowiringdiagrams.com has a page for LH2.4 and a page for LH3.1.
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