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Tried to start her last night. Crank no-start. Pulled connector in rear and with key in KPII no voltage to rear. Took Jumper as Lucid suggested from fuse 1 to fuse 11, same. Crank no start, didnt hear fuel pump prime. Removed jumper.
Replaced fuses. Started right up! So it surely must be a problem with the fuse panel right? Or could the removal and re-application of those two fuses send a "jolt" of voltage that resets something? Tray and fuse receptacles dont show any burning at all??
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"Pulled connector in rear and with key in KPII no voltage to rear."
As Art says, there will be no sustained voltage with the engine not running.
But there should be a short 1-2 second pulse for the (so-called) prime cycle when the key goes to KPII. You may need a helper on the key while you check for voltage at the plug in the rear.
The Regina ECU will repeat that short cycle as long as the Key Operator's wrist holds out: Off-KPII, Off-KPII, etc. [As an aside, I don't believe the Bosch ECU will do it more than 2 or 3 times.]
Seeing the voltage at the plug would at least verify that the ECU can energize the Fuel relay, and that the relayed voltage is as close to the pump as can be tested.
In this case, a test light would be preferred over a DVM indication. I would use the light holder's pointy end to "Back-probe" the pink wire on both sides of the connected plug, while listening for pump life.
--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.
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Cool thanks Bruce. Try as I might I was not quick enough to hit KPII and race back to see the voltage:) I will enlist the help of the wife. It was 7 degrees when I was messing with it the other night and she would have no part of that!
But in all seriousness, it appears you would not immediately condemn the fuse receptacle quite yet? I get what you are saying as my testing was based on a faulty assumption(KPII voltage). I will proceed with further testing and report back.
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From yesterday, 9:30 AM:
"Crank no start, didnt hear fuel pump prime." Removed jumper.
I should have said that the no-start with fuse 1 removed is normal, since the voltage can't get to the normal places (System relay and ECU). The objective wasn't to start the motor, but just to get handy some battery voltage to jumper to the pump fuse—to see if the pump would respond to "hot wiring".
Assuming you had the jumper wire placed correctly (bottom of socket 1 to top of socket 11), the pump should have run continuously, not just done the "prime" cycle.
EDIT: And I should have mentioned you wouldn't even need the key in or on for this hotwire test.
"Replaced fuses. Started right up! So it surely must be a problem with the fuse panel right? Or could the removal and re-application of those two fuses send a "jolt" of voltage that resets something?"
Possibly fuse corrosion rather than a panel problem. Removing and replacing fuses could have burnished fuse blades and rack socket contacts clean and restored current flow.
Yesterday, 14:25 PM:
"...it appears you would not immediately condemn the fuse receptacle quite yet?"
No,"condemn" is a bit strong for me, given that the, "Tray and fuse receptacles dont show any burning at all". But the quick start after replacing the fuses does suggest some kind of "faulty" contact there, as I mentioned above.
What's the current status? (Pun intended.) Is it still starting OK as you reported yesterday with the fuses reinstalled?
--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.
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Wow I was reading far too little into your methodology. So the jumper is just to get power to the pump, car shouldnt run with jumper in place, and pump should run continously with jumper place? Then as you said, "assuming jumper was placed correctly"(I believe it was)the pump should have run continously.
It did not, but I should have metered with the jumper in place as well.
Good stuff, I am sure I will use this again. Yesterday she started right up, first shot. I am going to pick n pull this am to get a turn signal light and other misc. then she is getting registered and on the road. I will leave fuse panel and rear connector exposed and have jumper and DVOM in car for when she acts up again.Thanks again.
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"I will leave fuse panel and rear connector exposed and have jumper and DVOM in car for when she acts up again."
Hi Matt,
Please spend a few bucks to supplement that DVOM with a 12V Test Lamp. Because there is something I call "Ghost Voltage" that will show as nice black digits on a DVM display, but barely a flicker (if that) on a 12V bulb. If you'll take time to scan the 5 short posts in this thread segment you'll see what I mean.
--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.
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Done. I will hit up Sears this afternoon.
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Hi Matt,
This post appears to be in no particular forum, but I recognize a 7/9 by the term Regina. You may want to post again, with a forum selected, as few of us have time to scan "ALL" in RWD.
Pulled connector in rear and with key in KPII no voltage to rear.
No Volvo fuel systems allow for sustained voltage to a fuel pump with key on and car not running, so this observation you made is not a clue.
The thought the trouble is in the fuse panel does sound right to me, even though your inspection reveals no marks. Most every 7/9 car I see in the junkyard has either that fuse panel ash tray thing removed or it is marked with burns and melted plastic. You probably are catching this common defect in its infancy.
--
Art Benstein near Baltimore
Everyone seems normal until you get to know them.
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Hi Art
Yes much to the chagrin of my employer I do scan All...hahaha.
If you were in my shoes would you pull the fuse panel and investigate the connections on the backside as a next step?
Matt
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Hi Matt,
There is probably more history to this no-start than I've bothered to dig up -- I was just encouraging you to re-post where more could see it. I'm a 240 owner.
But even here in the ALL/ALL forum, it has caught Bruce's attention, so when you ask what I would do in your shoes-- I would study Bruce's suggestions carefully and respond fully. Bruce writes from experience and does not waste any words.
--
Art Benstein near Baltimore
A closed mouth gathers no foot.
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Agreed and agreed. Being that Bruce had already chimed in I decided to leave this one here, but will post as you suggest in the future. Bruce doesnt waste words, but I can be a bit wordy eh? :) Never heard that before:) Have a great New Years Art!
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