Forum: performance & modifications
Today, 02:21 PM
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Replies: 5
Views: 159
No, it's a really skinny little pulse (~0.0001...
No, it's a really skinny little pulse (~0.0001 seconds long), so the multimeter will just read 0volts. If you have access to a labscope, it would be interesting to see if it's a) dead, or b) noisy,...
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Forum: performance & modifications
06-30-2022, 06:56 PM
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Replies: 5
Views: 159
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Forum: maintenance & nonperformance
06-29-2022, 07:10 PM
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Replies: 7
Views: 216
Years ago, I got a Bosch 69591 on closeout from...
Years ago, I got a Bosch 69591 on closeout from rockauto. At the time, I remember looking it up and finding that it was a cross to the whatever was the standard Volvo higher-pressure K-Jet pump. I...
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Forum: maintenance & nonperformance
06-28-2022, 09:51 PM
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Replies: 15
Views: 541
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Forum: maintenance & nonperformance
06-25-2022, 12:53 AM
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Replies: 15
Views: 541
OK, the white tops are a little bit bigger than...
OK, the white tops are a little bit bigger than original turbo injectors, but no where close to 8.5 AFRs. Something's dumping fuel into the engine off idle to get to the 8.5 AFRs. Air leaks, crud'd...
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Forum: maintenance & nonperformance
06-24-2022, 08:48 PM
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Replies: 15
Views: 541
Are you running turbo injectors (and resistor...
Are you running turbo injectors (and resistor pack) with a non-turbo ECU? What are the Bosch part numbers on your injectors, ECU, EZK?
Normal behavior is idle timing of 12deg, and jumping up to...
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Forum: maintenance & nonperformance
06-24-2022, 02:27 PM
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Replies: 12
Views: 454
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Forum: maintenance & nonperformance
06-23-2022, 01:11 AM
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Replies: 10
Views: 575
The original Volvo/Bosch MAFs are a hot-wire...
The original Volvo/Bosch MAFs are a hot-wire sensor, where there is literally a really thin heated platinum wire in the air stream. If you take the screen off the MAF, you can see the wire strung...
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Forum: performance & modifications
06-22-2022, 06:38 PM
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Replies: 33
Views: 1,162
Cool project! May it provide many hours of...
Cool project! May it provide many hours of entertainment and head scratching. :lol:
This is a wicked idea, but you would have to know the exact relationship of air mass to voltage, which I do...
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Forum: maintenance & nonperformance
06-17-2022, 09:18 PM
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Replies: 6
Views: 428
Sorry, didn't mean to make it worse. :oops:
...
Sorry, didn't mean to make it worse. :oops:
If you look inside the old MAF, there should be 4 spikes sticking out in roughly a square. Between 3 of the 4 should be a really thin and hard to see...
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Forum: maintenance & nonperformance
06-17-2022, 07:57 PM
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Replies: 1
Views: 270
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Forum: maintenance & nonperformance
06-17-2022, 03:17 PM
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Replies: 6
Views: 428
Check your hoses again - make sure they're all...
Check your hoses again - make sure they're all fully seated (including brake booster, and IAC hoses), and that there aren't any new ruptures/big cracks (squeeze and feel around the backsides where...
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Forum: maintenance & nonperformance
06-16-2022, 07:11 PM
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Replies: 18
Views: 704
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Forum: performance & modifications
06-13-2022, 07:32 PM
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Replies: 9
Views: 655
^^^ Yes.
For wasted spark, the wasted one...
^^^ Yes.
For wasted spark, the wasted one should occur at TDC of the exhaust stroke (when nothing's in the cyl). Firing order of 1-3-4-2 means 1-4 and 3-2 are the pairs that are at TDC at the...
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Forum: maintenance & nonperformance
06-13-2022, 07:24 PM
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Replies: 10
Views: 648
That's certainly a strange set of behaviors.
...
That's certainly a strange set of behaviors.
I looked at the '93 wiring diagrams (my crossword puzzle for the day), and I think you have a short between the brake light wire and the fog light...
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Forum: performance & modifications
06-13-2022, 06:39 PM
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Replies: 9
Views: 655
Let's start with a couple basics:
1) When did...
Let's start with a couple basics:
1) When did the engine last run properly? What have you done since then? Have you remounted the flywheel/flexplate?
2) In MS, if you go to the CANbus/Testmodes...
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Forum: maintenance & nonperformance
06-13-2022, 03:25 PM
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Replies: 10
Views: 648
Check the ground wires off of each taillight...
Check the ground wires off of each taillight assembly - there can be strange failures if the grounds aren't good. If you have a helper, or a stick, push down the brake pedal and measure the voltage...
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Forum: performance & modifications
06-13-2022, 03:20 PM
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Replies: 9
Views: 655
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Forum: maintenance & nonperformance
06-12-2022, 08:41 PM
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Replies: 2
Views: 386
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Forum: performance & modifications
06-12-2022, 08:36 PM
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Replies: 17
Views: 1,117
You're talking about a pretty big project --...
You're talking about a pretty big project -- custom hardware design, custom PCB, custom display bezel/mounting, embedded firmware, and a custom Apple/Android App, but here's some suggestions to get...
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Forum: aftermarket engine management
06-11-2022, 10:38 AM
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Replies: 46
Views: 3,130
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Forum: maintenance & nonperformance
06-10-2022, 03:37 PM
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Replies: 11
Views: 566
It most likely slipped at the crank gear...
It most likely slipped at the crank gear (smallest of the gears), with cam and aux still being in correct alignment to each other. If you rotated the cam gear to re-align, you need to rotate the aux...
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Forum: maintenance & nonperformance
06-10-2022, 03:27 PM
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Replies: 11
Views: 566
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Forum: aftermarket engine management
06-10-2022, 08:59 AM
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Replies: 46
Views: 3,130
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Forum: aftermarket engine management
06-08-2022, 11:40 AM
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Replies: 46
Views: 3,130
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Forum: maintenance & nonperformance
06-07-2022, 09:00 AM
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Replies: 3
Views: 552
A VR (variable reluctance) sensor generates...
A VR (variable reluctance) sensor generates electricity from a moving magnetic field. It consists of an iron core, wound with lots of fine wire, and a magnet. When a gear tooth comes close to the...
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Forum: aftermarket engine management
06-04-2022, 06:20 PM
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Replies: 9
Views: 725
Here's a rather technical description of how...
Here's a rather technical description of how megasquirt fueling works: http://www.megamanual.com/v22manual/mfuel.htm#equation
Basically, it's trying to figure out how long to pulse the injectors...
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Forum: maintenance & nonperformance
06-04-2022, 04:16 PM
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Replies: 12
Views: 660
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Forum: aftermarket engine management
06-04-2022, 04:13 PM
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Replies: 9
Views: 725
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Forum: projects & restorations
05-31-2022, 09:05 PM
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Replies: 26
Views: 2,385
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Forum: aftermarket engine management
05-29-2022, 07:38 PM
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Replies: 10
Views: 888
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Forum: performance & modifications
05-28-2022, 01:14 PM
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Replies: 6
Views: 1,003
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Forum: performance & modifications
05-27-2022, 05:10 PM
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Replies: 6
Views: 1,003
I'm confused - what exactly is your setup? ...
I'm confused - what exactly is your setup? MicroSquirt + Bosch 2x2 Coil + Dual external ignitor? Or are you trying to use MicroSquirt for fuel-only, and keeping the EZ116K, with an add-on wasted...
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Forum: aftermarket engine management
05-26-2022, 06:43 PM
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Replies: 2
Views: 502
The chip is not discontinued, or at least...
The chip is not discontinued, or at least digikey.com (USA) and uk.farnell.com (UK) both list it as in stock and not EOL. Technically, the MS3 knock sensor software is "NOTE! This feature is only...
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Forum: aftermarket engine management
05-24-2022, 11:38 PM
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Replies: 46
Views: 3,130
I looked at your MicroSquirt Tooth Logger logs...
I looked at your MicroSquirt Tooth Logger logs and think I understand most of what I'm seeing, but I'm still puzzled by your original picture where it was running OK and then lost sync at ~2400rpm.
...
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Forum: aftermarket engine management
05-23-2022, 03:32 PM
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Replies: 46
Views: 3,130
Hmm...., it's certainly a strange one.
One...
Hmm...., it's certainly a strange one.
One more thought, how's the alternator? Bad diodes in the alternator can cause a lot of extra electrical noise, which might confuse the VR signal/circuit. ...
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Forum: aftermarket engine management
05-23-2022, 03:01 PM
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Replies: 46
Views: 3,130
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Forum: aftermarket engine management
05-22-2022, 09:31 PM
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Replies: 46
Views: 3,130
You could try wiring direct from the CPS...
You could try wiring direct from the CPS connector to the MicroSquirt using 2-wire shielded cable (link (https://www.diyautotune.com/product/wire-2-core-shielded-22-gauge-10-39/)). Connect the...
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Forum: performance & modifications
05-21-2022, 01:04 PM
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Replies: 15
Views: 1,415
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Forum: performance & modifications
05-20-2022, 08:58 AM
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Replies: 21
Views: 2,146
Unless you have extensive Autronic knowledge...
Unless you have extensive Autronic knowledge already, you'll be _way_ better off buying a MicroSquirt and an 8 foot harness with individually labeled wires (~$450), especially around here where there...
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Forum: maintenance & nonperformance
05-19-2022, 08:09 PM
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Replies: 7
Views: 1,069
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Forum: maintenance & nonperformance
05-18-2022, 09:04 PM
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Replies: 7
Views: 849
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Forum: maintenance & nonperformance
05-18-2022, 08:44 PM
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Replies: 7
Views: 849
It looks like the MCC module supplies power to...
It looks like the MCC module supplies power to engage the A/C compressor through the A/C pressure sensor. I'd check the wiring around the pressure sensor (by accumulator can), and then trace it over...
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Forum: maintenance & nonperformance
05-17-2022, 07:12 PM
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Replies: 11
Views: 1,236
FYI - You can find the LH2.4 fault tracing...
FYI - You can find the LH2.4 fault tracing greenbook under TP31361 at ozvolvo.org/archive/
[Just to sure, the LH2.2 temp sensor looks like the LH2.4 temp sensor but isn't interchangable -- LH2.2...
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Forum: website & board
05-13-2022, 07:32 PM
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Replies: 52
Views: 3,800
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Forum: maintenance & nonperformance
03-21-2022, 10:03 PM
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Replies: 11
Views: 702
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Forum: maintenance & nonperformance
03-18-2022, 04:48 PM
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Replies: 9
Views: 967
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Forum: maintenance & nonperformance
03-16-2022, 07:50 PM
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Replies: 6
Views: 819
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Forum: aftermarket engine management
03-16-2022, 07:45 PM
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Replies: 5
Views: 751
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...
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Forum: performance & modifications
03-16-2022, 07:34 PM
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Replies: 19
Views: 1,816
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...
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