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Old 02-21-2018, 11:21 AM   #26
SquareD
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Green 5 speed with **** paint, iPd sways, B cam, ice cold ac, hot heat, a few poly bushings, too much rust, etc. great when it’s not 90% humidity.
You're quite the salesman.
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Old 02-21-2018, 11:25 AM   #27
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I don't follow, but sure why not!? I use it on certain airbag recalls on the connectors per the directions. It can only help. It will also help keep things water tight. I think there was a Volvo bulletin back in the day instructing techs to smear it on the ECU connector on a 740. Moisture and vibration causes fretting on terminals.

I would pull the ignition coil wires and lightly clean the terminals. Do same with all the fuses. Possibly the fuel pump wiring too.


Come to think of it, spark plug wires are also suspect. My 1990 240 wouldn't start/misfires in high humidity in the mornings and plug wires were shorting. Spray baking soda water on them at night and inspect for arcing.
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Old 02-21-2018, 11:41 AM   #28
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You're quite the salesman.
$3k firm no low baller. I KNOW WHAT I HAVE
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Old 02-21-2018, 11:45 AM   #29
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Originally Posted by ZVOLV View Post
I don't follow, but sure why not!? I use it on certain airbag recalls on the connectors per the directions. It can only help. It will also help keep things water tight. I think there was a Volvo bulletin back in the day instructing techs to smear it on the ECU connector on a 740. Moisture and vibration causes fretting on terminals.

I would pull the ignition coil wires and lightly clean the terminals. Do same with all the fuses. Possibly the fuel pump wiring too.


Come to think of it, spark plug wires are also suspect. My 1990 240 wouldn't start/misfires in high humidity in the mornings and plug wires were shorting. Spray baking soda water on them at night and inspect for arcing.
I inspected in the dark last night (without spray) and couldn’t see any arcing. Gave everything the good old wiggle test but no change. Swapped out a spare cap and rotor that I have but no change. Wiggle o2 sensor wiring and no change. Wiggled ECT, IAC, TPS etc no change. The o2 heater wires on the firewall were kinda crusty so I used a flat blade to clean them up. No change. And as stated above I’ve swapped wires with a used set (I know, I conclusive) and the results are the exact same. I also pulled ignition coil wires and reseated all spare connectors. Didn’t clean them just reseated them.

Maybe I will spin some fuses today
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Old 02-21-2018, 12:14 PM   #30
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It rained last night a lot, but temps got low. 26F this morning and they say 90% humidity but I doubt it with how cold it is. Anyway, car started and ran fine today albeit the typical B cam cold idle for 30 seconds. No bogging down.

Now we wait to see if the 7 gives us trouble.

EDIT: https://www.reddit.com/r/askscience/...reezing_point/

Alright well I don't really get this too much but it definitely *feels* less humid than the torrential downpours we've been having.
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Old 02-21-2018, 02:13 PM   #31
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Issues came back after class. At idle, when it’s running like crap, the exhaust reaks of fuel. That leads me to believe it’s receiving sufficient fuel pressure, but not sufficient ignition. Maybe I’ll swap coils or have a look at the powerstage.
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Old 02-21-2018, 03:51 PM   #32
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Anddddd 7 wouldn’t start whe she needed to drive to an interview. Man a loan on a Camry sure seems tempting right now.
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Old 02-21-2018, 03:56 PM   #33
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Send her my serene condolences...












































































Again.
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how psi stock cna support?

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Old 02-21-2018, 04:06 PM   #34
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You need to figure out if it's a no spark or no fuel. Powerstage could be getting wet. Or is this Regina?
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Old 02-21-2018, 04:15 PM   #35
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You need to figure out if it's a no spark or no fuel. Powerstage could be getting wet. Or is this Regina?
Lh2.4. We’re just both so ****ing busy with school and stuff otherwise it wouldn’t be a big deal. I will see if it’s lack of spark or fuel later on. I’m guessing spark but we’ll see.
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Old 02-21-2018, 06:00 PM   #36
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Powerstage was wet. Dried it and cleaned all the white **** off with a wire wheel. Cleaned the back surface where it mounts to the fender. Cleaned pretty much everything.

Still no change.

Edit: I understand that thermal paste is important in heat transfer, but i didn’t know if there was a grounding issue or something. I’ll try to get some thermal paste for the powerstage soon.

Last edited by PromiseRing; 02-21-2018 at 06:32 PM..
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Old 02-21-2018, 07:00 PM   #37
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What kind of shape is your wiring harness in? Even the late non-biodegradable ones can have issues this late in the game.

Have you gone through the LH2.4 green book trouble shooting steps? It only takes about an hour or so to check everything fuel and ignition.
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Old 02-21-2018, 07:21 PM   #38
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What kind of shape is your wiring harness in? Even the late non-biodegradable ones can have issues this late in the game.

Have you gone through the LH2.4 green book trouble shooting steps? It only takes about an hour or so to check everything fuel and ignition.
Wiring harness appears to be perfect everywhere. Haven't ran through all those steps yet though.

Here is a video of how it acts on cold starts. Once it's warmed up it seems fine. I beat the hell out of it burning through second gear. Pulls all the way to limiter when warm

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Old 02-21-2018, 07:25 PM   #39
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Have you pulled the plugs to see what they look like?
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Nothing's black magic. Basics to moderate power levels are cake, period. Start off rich and retarded, like your president.
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Old 02-21-2018, 07:36 PM   #40
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Have you pulled the plugs to see what they look like?
Have not. It just seems like a super rich condition until warm and then it clears up. If we ever have some clear weather without humidity I'll see if the issues persist.
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Old 02-21-2018, 08:00 PM   #41
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Coolant temp sensor?
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Old 02-21-2018, 08:11 PM   #42
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Coolant temp sensor?
Replaced with OE Volvo like a year ago I think
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Old 02-21-2018, 08:24 PM   #43
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Wow. These either look lean or they look okay. Definitely not rich like i thought




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Old 02-21-2018, 10:50 PM   #44
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Just installed a pink label 561 ecu and the problems are gone. What the ****
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Old 02-22-2018, 12:20 AM   #45
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Now with the 951 ecu the issues are gone too. Tomorrow morning will bring more conclusive results.
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Old 02-22-2018, 04:54 AM   #46
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Green 5 speed with **** paint, iPd sways, B cam, ice cold ac, hot heat, a few poly bushings, too much rust, etc. great when it’s not 90% humidity.
Rust not goodly but I hope it serves you well in any case
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Old 02-22-2018, 10:27 AM   #47
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Toss the old ecu back in there and see if acts up again. Could just be fretting on the terminals and the plug/unplug cleaned it up. Maybe not.

Modern cars have much smaller terminals than these old tanks. I commonly have to install new terminals and run fresh wires on circuits that act up.
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Old 02-22-2018, 02:07 PM   #48
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Wow. These either look lean or they look okay. Definitely not rich like i thought




Is your car supposed to be running non-resistor plugs?
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Old 02-22-2018, 02:21 PM   #49
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^ probably should be running BPR6ES instead, but IIRC the auto parts store didn’t have them at the time. AFAIK, that should cause any issue right?

Also, 951 ecu is back in and the issuenis gone for now. So maybe I just needed to reseat the connector. We will see if it stays good though.
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Old 02-22-2018, 03:39 PM   #50
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Issue slightly came back on the way to class. I’m gonna plop in the pink label 561 one indefinitely and deal with the cel, we will see if the issue persists, again.
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