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Forum: maintenance & nonperformance Today, 12:57 PM
Replies: 1
Views: 78
Posted By 142 guy
On a B230 FT the idle speed is controlled by an...

On a B230 FT the idle speed is controlled by an Idle Air Control valve that is controlled by the ECU. If the valve is sticking or has failed, idle speed will not be controlled. However, even with...
Forum: maintenance & nonperformance 09-15-2021, 11:15 AM
Replies: 8
Views: 1,756
Posted By 142 guy
The analysis of how the analog circuits work can...

The analysis of how the analog circuits work can be found here:

https://members.rennlist.com/pbanders/ecu.htm

That website used to have links to the main and daughter board schematics. ...
Forum: maintenance & nonperformance 09-13-2021, 07:28 PM
Replies: 7
Views: 562
Posted By 142 guy
With 5% acetic acid vinegar (the stuff you put...

With 5% acetic acid vinegar (the stuff you put on your chips), it will probably be 2121 before the rust disappears. Muriatic acid will dissolve rust fairly quickly; but, you need to keep the part...
Forum: maintenance & nonperformance 08-20-2021, 12:24 PM
Replies: 64
Views: 4,398
Posted By 142 guy
- All the spots previously mentioned (rear arches...

- All the spots previously mentioned (rear arches is pretty much guaranteed rust spot)
- Since it is a 142, probe the horizontal seam where the rear 1/4 panel overlays the rocker panel. Great...
Forum: maintenance & nonperformance 08-05-2021, 07:51 PM
Replies: 12
Views: 1,947
Posted By 142 guy
I have a roll of 676675 sealed in an original...

I have a roll of 676675 sealed in an original Volvo bag that I sourced about 4 - 5 years ago and have been hoarding for future use. The sticker on the bag indicates that it was sourced through...
Forum: maintenance & nonperformance 07-27-2021, 11:12 PM
Replies: 7
Views: 2,575
Posted By 142 guy
I have used 5W50 synthetic for the last 5 years. ...

I have used 5W50 synthetic for the last 5 years. Cranks like it has 5W at start up. I expect the slow cranking was due to the battery sitting for around since June 23 gradually being dragged down...
Forum: maintenance & nonperformance 07-27-2021, 02:00 PM
Replies: 7
Views: 2,575
Posted By 142 guy
I would normally be inclined to agree. My...

I would normally be inclined to agree. My expectation was that when I pulled the pump apart I would find a broken spring in the pressure relief valve; but, it was intact. Given the design of the...
Forum: maintenance & nonperformance 07-27-2021, 11:05 AM
Replies: 7
Views: 2,575
Posted By 142 guy
A bit of follow up. After a 3+ week delay in...

A bit of follow up.

After a 3+ week delay in getting the pan gasket from Rock Auto following Fed Ex losing the first one. I got around to dropping the sump to remove the oil pump. As to the cause...
Forum: maintenance & nonperformance 06-28-2021, 11:12 AM
Replies: 7
Views: 1,795
Posted By 142 guy
Lose power? As in a complete loss of power /...

Lose power? As in a complete loss of power / engine shut down or is power output just declining? If it is a complete loss of power then it could be a thermal problem in the electronics, either a...
Forum: maintenance & nonperformance 06-27-2021, 12:56 PM
Replies: 7
Views: 2,575
Posted By 142 guy
I pulled the distributor drive gear off yesterday...

I pulled the distributor drive gear off yesterday afternoon. The drive gear shaft is fine and the top of the oil pump where the drive gear shaft engages the pump looks to be fine (as much of it as...
Forum: maintenance & nonperformance 06-25-2021, 05:15 PM
Replies: 8
Views: 2,603
Posted By 142 guy
That would be some pretty high strength 'standard...

That would be some pretty high strength 'standard rust'. Pumping grease into the caliper is the safe way of unsticking a piston; but, also the messy way.
Forum: maintenance & nonperformance 06-25-2021, 03:57 PM
Replies: 7
Views: 2,575
Posted By 142 guy
B20E No Oil Pressure Blues

I was out driving around a couple of evenings ago in my 1971 142E. I came up on a red light and had to do a firm stop and I noticed that the low oil pressure warning light on my electronic oil...
Forum: performance & modifications 05-23-2021, 02:43 PM
Replies: 14
Views: 3,181
Posted By 142 guy
28.2, as in Feb 28? If you used PayPal, I think...

28.2, as in Feb 28? If you used PayPal, I think that they have increased the cut off date for dispute resolution (it used to be something ridiculous like 40 or 60 days) so, initiate a dispute...
Forum: maintenance & nonperformance 05-20-2021, 12:21 PM
Replies: 5
Views: 1,490
Posted By 142 guy
By tips I assume you mean the shoe / surface ...

By tips I assume you mean the shoe / surface that contacts the valve stem? The shoes on my B20E are definitely not blue. The stock rockers are not heat treated or intentionally surface hardened....
Forum: performance & modifications 05-20-2021, 12:06 PM
Replies: 21
Views: 3,521
Posted By 142 guy
For a stock fuel system normally I would...

For a stock fuel system normally I would recommend Denso. The Denso pumps in my Acura NSX and Honda Pilot are 21 years and 18 years old and the pump in my Son's RSX is 16 years old. However,...
Forum: maintenance & nonperformance 05-08-2021, 03:07 PM
Replies: 13
Views: 2,561
Posted By 142 guy
Being a B20 is not the problem. Its what is the...

Being a B20 is not the problem. Its what is the B20 installed in and the details of your Megasquirt configuration. I have a 1971 142 E with a megasquirt retrofit and I had a similar problem. ...
Forum: aftermarket engine management 05-08-2021, 02:11 PM
Replies: 41
Views: 12,160
Posted By 142 guy
I am a clumsy C programmer; but, my understanding...

I am a clumsy C programmer; but, my understanding is that time functions should not be used within the ISR. In your ISR, you are initializing entertime using the micros() function. The micros()...
Forum: aftermarket engine management 05-05-2021, 09:47 PM
Replies: 41
Views: 12,160
Posted By 142 guy
Cars have have one of two misfire detection...

Cars have have one of two misfire detection systems, or both. One looks at crankshaft speed fluctuations and the other monitors ignition coil output voltage. I have an Acura and it has two...
Forum: maintenance & nonperformance 05-04-2021, 11:52 AM
Replies: 12
Views: 2,696
Posted By 142 guy
If it is a Bosch 3 wire valve, it might also be...

If it is a Bosch 3 wire valve, it might also be open when un powered. I just mentioned the Bosh 2 wire valve because I know that it is open when it is not powered up. Checking the service manual...
Forum: maintenance & nonperformance 05-03-2021, 06:04 PM
Replies: 12
Views: 2,696
Posted By 142 guy
As a further note, my previous comments were...

As a further note, my previous comments were based upon using a starter by-pass switch to operate the starter motor during cranking with the ignition switch off. If you disable the fuel pump and...
Forum: maintenance & nonperformance 05-03-2021, 01:32 PM
Replies: 12
Views: 2,696
Posted By 142 guy
The difference in the test results in a car with...

The difference in the test results in a car with a conventional throttle will likely be in how quickly the cylinder reaches its final test pressure. The throttle plate creates a restriction in the...
Forum: aftermarket engine management 04-30-2021, 12:59 PM
Replies: 41
Views: 12,160
Posted By 142 guy
I had not read your code and had read into your...

I had not read your code and had read into your comments that you were using the digital read inside the main loop. If you are doing the digital read inside the ISR then you have eliminated the...
Forum: aftermarket engine management 04-26-2021, 11:08 AM
Replies: 41
Views: 12,160
Posted By 142 guy
The digital read may work if the event timing is...

The digital read may work if the event timing is relatively slow compared to the clock speed and you don't have many other code steps going on in the main software loop. As an example, if...
Forum: aftermarket engine management 04-25-2021, 01:02 PM
Replies: 41
Views: 12,160
Posted By 142 guy
First off, I did not mean to imply that you...

First off, I did not mean to imply that you should not use opto isolators. Its just that you need to be aware of the frequency limitations. It seems like you are already aware of those problems so...
Forum: aftermarket engine management 04-23-2021, 12:56 PM
Replies: 41
Views: 12,160
Posted By 142 guy
Be aware that opto isolators have a down side. ...

Be aware that opto isolators have a down side. Their high frequency response is not spectacular. I use opto isolators on the inputs from the optical sensors on my tach and cam wheels on my MSII...
Forum: performance & modifications 04-23-2021, 11:34 AM
Replies: 5
Views: 2,983
Posted By 142 guy
If you need a place to start, use the Ve table...

If you need a place to start, use the Ve table generator in the Megamanual

http://www.megamanual.com/v22manual/vetable.htm

I think there are other Ve generators out there if you go looking. ...
Forum: maintenance & nonperformance 04-16-2021, 01:27 AM
Replies: 11
Views: 2,989
Posted By 142 guy
When you turn the ignition key to the run...

When you turn the ignition key to the run position does the fuel pump start up and run for about 2 seconds and then shut off? That is the fuel pump prime cycle to pressurize the fuel system before...
Forum: maintenance & nonperformance 04-12-2021, 05:17 PM
Replies: 22
Views: 4,645
Posted By 142 guy
At idle, particularly when the air temp is cool...

At idle, particularly when the air temp is cool the temperature of the coolant in the engine outlet hose fluctuates about 6 Deg C (give or take) because the thermostat tends to be a bit of a bang...
Forum: maintenance & nonperformance 04-12-2021, 12:57 PM
Replies: 22
Views: 4,645
Posted By 142 guy
Have you ever thought about the possibility that...

Have you ever thought about the possibility that the gauge itself is the problem? I don't have a service manual for the 240; but, I expect that there should be a calibration test that you can...
Forum: maintenance & nonperformance 04-11-2021, 05:33 PM
Replies: 11
Views: 2,989
Posted By 142 guy
Yes, one terminal in the injector plug is...

Yes, one terminal in the injector plug is grounded at the connection on the intake manifold. The other terminal receives switched power from the controller. ON my 1971 142 E, each wire in the D...
Forum: maintenance & nonperformance 04-10-2021, 04:32 PM
Replies: 11
Views: 2,989
Posted By 142 guy
How did you confirm fuel delivery? The most...

How did you confirm fuel delivery? The most direct way would be to pull the fuel rail out with the injectors attached and then crank the engine for a second or two to confirm fuel delivery at each...
Forum: aftermarket engine management 04-10-2021, 04:15 PM
Replies: 45
Views: 9,646
Posted By 142 guy
No direct experience with that particular sensor;...

No direct experience with that particular sensor; but, as a general observation Hall sensors are easier to deal with than Vr sensors. No speed related issues and no need for conditioning circuits.
Forum: performance & modifications 04-09-2021, 12:53 AM
Replies: 9
Views: 2,952
Posted By 142 guy
Do you know whether you are going to do wasted...

Do you know whether you are going to do wasted spark or are you planning for full sequential on fuel and spark with individual coils for each cylinder. That would be a good thing to figure out...
Forum: aftermarket engine management 04-07-2021, 12:56 PM
Replies: 5
Views: 3,643
Posted By 142 guy
Coolant temperature effects should be completely...

Coolant temperature effects should be completely out of the picture once the engine is up to normal operating temperature. Make sure that you don't have some coolant temperature based PW adder that...
Forum: performance & modifications 04-07-2021, 12:25 PM
Replies: 6
Views: 3,547
Posted By 142 guy
The most important factor is that you do not want...

The most important factor is that you do not want to ground the heater circuit for the wideband controller at the Microsquirt controller. This will couple the heater current which can include a lot...
Forum: performance & modifications 04-05-2021, 12:55 PM
Replies: 4
Views: 1,888
Posted By 142 guy
The O2 sensor wiring in both links is correct. ...

The O2 sensor wiring in both links is correct. The O2 sensor signal enters on pin MS pin 34. The MSExtra diagram makes provision for connection of an isolated O2 sensor signal ground back to pin...
Forum: maintenance & nonperformance 04-02-2021, 01:08 PM
Replies: 4
Views: 1,760
Posted By 142 guy
How good is the Evap system in your 940? If it...

How good is the Evap system in your 940? If it works properly and seals as designed then you do not have to worry about the fuel system breathing moist outside air into the tank as ambient air...
Forum: performance & modifications 04-01-2021, 11:11 AM
Replies: 5
Views: 1,801
Posted By 142 guy
Yes to preventing the formation of ice in the...

Yes to preventing the formation of ice in the PVC system; but, more likely to prevent the formation of ice which blocks the PVC air flow through the engine (located between the airbox and turbo it...
Forum: maintenance & nonperformance 03-24-2021, 07:03 PM
Replies: 12
Views: 1,980
Posted By 142 guy
Tachs tend to come in two flavors, voltage...

Tachs tend to come in two flavors, voltage sensing (the most common) and current sensing (like the original Volvo tach's supplied by Smiths). If you purchase a modern tach, it will almost certainly...
Forum: maintenance & nonperformance 03-22-2021, 01:51 PM
Replies: 19
Views: 3,848
Posted By 142 guy
First off, do the differential yoke twist to...

First off, do the differential yoke twist to check for play in the differential. If you can twist the yoke at all without any movement in the rear wheels you have lash inside the differential that...
Forum: aftermarket engine management 03-12-2021, 06:18 PM
Replies: 19
Views: 6,163
Posted By 142 guy
The set temperature of the soldering iron will in...

The set temperature of the soldering iron will in part depend on the wattage of the heating element. If you have a lower wattage heating element you may have to set the temperature a bit hotter...
Forum: aftermarket engine management 03-12-2021, 12:40 PM
Replies: 19
Views: 6,163
Posted By 142 guy
I have gone full sequential with coils with...

I have gone full sequential with coils with integrated drivers so I have no experience with conventional ignition coil control using the BIP 373 or external amplifiers. I will let others advise on...
Forum: maintenance & nonperformance 03-11-2021, 04:57 PM
Replies: 3
Views: 1,610
Posted By 142 guy
Looks like you are going to have to 'find' the...

Looks like you are going to have to 'find' the key to go with your 'found' gutter mounts. Thule can supply you with a key if you provide the cylinder code.
...
Forum: performance & modifications 03-11-2021, 01:18 PM
Replies: 10
Views: 2,407
Posted By 142 guy
That picture posted by Redwood appears to be the...

That picture posted by Redwood appears to be the later 140 filter assembly (part # ends in ....44). New ones are still available.
...
Forum: maintenance & nonperformance 03-09-2021, 12:53 PM
Replies: 18
Views: 2,275
Posted By 142 guy
I agree with Mr. Chair. I would do a quick...

I agree with Mr. Chair. I would do a quick visual inspection of the lower portion of the steering shaft. Grab the input to the steering box (below the break away section) and then grab the top of...
Forum: performance & modifications 02-20-2021, 12:37 PM
Replies: 13
Views: 2,245
Posted By 142 guy
Begs the question, is the OP incurring back fire...

Begs the question, is the OP incurring back fire which is combustion products exiting through the intake system (the always spectacular flame exiting the chokes on a 4 barrel carb followed by...
Forum: performance & modifications 02-19-2021, 01:11 PM
Replies: 13
Views: 2,245
Posted By 142 guy
Do you have a blow off valve venting to...

Do you have a blow off valve venting to atmosphere? If not, where is the flame coming from if the exhaust manifold was repaired?

If you have an atmospheric venting blow off valve, the upset in...
Forum: projects & restorations 02-18-2021, 09:16 PM
Replies: 81
Views: 59,571
Posted By 142 guy
The bracket with the relays would have been...

The bracket with the relays would have been common on all 140s up until at least 1972. No bolts associated with mounting the bracket, just a couple of phillips head sheet metal screws (probably #8...
Forum: projects & restorations 02-18-2021, 11:57 AM
Replies: 81
Views: 59,571
Posted By 142 guy
The 'sketchy aftermarket junction box' that you...

The 'sketchy aftermarket junction box' that you are referring to, is that that row of three relays mounted on a bracket? If so, that is not aftermarket. It is OEM and (on a 1971 model) the three...
Forum: maintenance & nonperformance 02-13-2021, 01:44 PM
Replies: 4
Views: 1,482
Posted By 142 guy
I expect that the Amazon is like the 140. All...

I expect that the Amazon is like the 140. All the external rear view mirrors on the 140 were dealer installed so there is no 'correct' location. For the driver side with an OEM Volvo mirror, the...
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