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It's only been 42k since last Full tune up (wires, cap, rotor, plugs, throttle body cleaning, etc). Went through chasing the bad running and finally thought I had fixed it when I replaced the CT sensor. Ran great until this week ... now, it misses going up hills and seems to be getting worse. No fluctuating tach, no obvious arching wires (just looking at them in the dark). Can the power stage be failing (I replaced it with a used one--in diagnosing the other problem)? Or, is it time to do it all again?
Any ideas are appreciated, as always...
randyB
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Did you check all vacuum lines?for being loose??I cut offabout a 1/2 :" & replace the line..chk the diagram to make sure all are tite
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Did you check all vacuum lines?for being loose??I cut offabout a 1/2 :" & replace the line..chk the diagram to make sure all are tite
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Did you check all vacuum lines?for being loose??I cut offabout a 1/2 :" & replace the line..chk the diagram to make sure all are tite
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I have 4 Volvos and 1 is a Regina, the one that gives me trouble all the time. This would be hard for you to test, but I had all that drag problem for a long time and ended being the transmission. I put a used one from a junk jard. No drag. When I took it off it was had to turn the converter.
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I would suspect the fuel pump, especially if it's the original one. The schrader valve on the fuel rail points down (I can't say why) making it impossible to fit a normal fuel pressure gauge. But Art Benstein was able to use a pencil type tire gauge on it for to an approximate pressure reading—with some spray/spillage (have rags handy). Pressure should be about 36psi at idle.
You could also rig an ammeter at a connector in the left rear wheel housing (trunk panel must come off) to check the pump current. Normal is around 7-8 amps.
I can give more detail on this if needed.
--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.
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Thanks lucid!
Let me try to do the two suggested and then if no luck, I will give you a shout!
Just a general question tho'... are all Regina systems this problematic? This is my first and it has given me fits.
randyB
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Have you ever replaced the fuel filter. If not, it's time.
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yes I changed it (and the air filter) at the time of the complete tune up. I didn't mention that I also replaced the RPM sensor (Called crank position sensor by some, I think). I also had the fuel pressure tested and, at that time it's ok(guy said it was normal). I cleaned the throttle body and the idle control motor -- both bad dirty.
The car was new to me and was intermittently stalling and stumbling. AS I said before it turned out to be the CTS. FOr a little while it was a great running car. In chasing tat I also put a used radio suppression relay and coil on -- no change.
thanks for the suggestion chris! Any others, please let me know.
randyB
PS Sorry for the blank post
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What do you call problematic? The fuel pump is a bit shorter-lived than the Bosch, but 16 or 17 years if original isn't bad. My '93 Regina has had no running problems nearly 6 years I've had it, although I replaced the pump preemptively at 157K miles.
I've been keeping almost a daily watch here that long too, and would say the Rex-Regina cars are no more problematic than the Bosch, based on reported problems.
--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.
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problematic to me means that we have this short interval between tune up, good running results and then into bad running.
This is "a new" vehicle to me and when I first got it went through the chasing of the intermittent stalling/stumbling/occassional rough running thing until I found that the CTS was faulty.
I am a rookie and more of a parts replacer than a thorough diagnostic guy --- by ignorance more than anything else and, therefore, thank God for all of you folks on the brickboard!
What I am guaging against is probably unfair ... her 1994 940 that she got at 185k and when it was t-boned had 450k on the clock and was still running great. I did the routine things (and yes, I did have to replace both fuel pumps on it also) and that old girl just kept on running great.
Any other thoughts, please let me know!
randyB
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Hi Randy,
Mike has a point with the Ignition coil power stage. A search on Rex (or even Regina) coil should get some hits about taking the coil off to clean the the contacts to the power stage—which actually hasn't been a frequently reported failure that I know of.
My thought on your pump was that being old it might not be able to supply the fuel need for acceleration and on hills. In that case, an idling pressure check could look just fine. An in-car pump current monitor would be nice, if possible.
I also must confess that I did have one running problem with my 940 Regina, but it wasn't specific to the Regina. It was the 700/900 RSR (Radio noise suppression Relay).
The problem was on the relay ground side, and caused a total stall-out, under varying temperature (I think) conditions. This Post shows the location of the problem ground terminal, and links back to my "Geezer Puzzled" thread.
--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.
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"...A search on Rex (or even Regina) coil should get some hits about taking the coil off to clean the the contacts to the power stage—which actually hasn't been a frequently reported failure that I know of..."
I had that problem several years ago, and I remember Chris Herbst reporting the same thing. But at least in my case it produced a no-start problem, especially when warm. Once started, it ran fine.
The fact that Randy's car will miss on the uphills, but clear up when he gives it more throttle, is interesting. It almost sounds like it just needs a good 'ole injector cleaning.
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Yes! I have had that exact problem with the power stage contacts not once, not twice, but three times. Like you, it was a total no-start when warm, the first time. (Actually, this took me about three or four occurrences to finally nail the problem). Times 2 and 3, it died on the road when someone else was driving it, and both times it started and was driven off the flatbed when it arrived at the shop. Both of these times the problem was corrected right away.
Now, to the OP, who may be suffering a fuel flow problem: I think the fuel pump suggestions are very good. I have had 3 Regina fuel pumps die over the years (also 300,000 combined miles). One died slowly, causing the car to run poorly at low RPM, when low on fuel. The second caused it to run erratically at all times, and stall periodically. The third caused a total no-start. I jarred the fuel pump area on the gas tank with a block of wood and the car started immediately, continuing to start and run fine until I replaced the pump a few days later.
------------
Chris Herbst
Scottsdale, AZ
1992 940, 150k
2005 S80, 29k
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I jarred the fuel pump area on the gas tank with a block of wood and the car started immediately, continuing to start and run fine until I replaced the pump a few days later.
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Art Benstein near Baltimore
A plateau is a high form of flattery.
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A pictorial explanation!
(Actually I was going to say, I *swear* I didn't hit it THAT hard.)
I should have dismantled mine afterwards out of curiosity, but the job went unbelievably well on that cold day, taking me only about 45 minutes (sedan) from start to finish. In celebration, I promptly ditched the old one in the trash and made myself a big martini.
------------
Chris Herbst
Scottsdale, AZ
1992 240, 150k
2005 S80, 29k
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Thanks again lucid! I am beginning to lean toward the fuel pressure, however tonight going up a hill it gave the "skip a beat" thing and I gave it more acceleration -- it picked up and ran fine the rest of the way up the hill. If it would
I will have to give the RSR thing a try. Great link and postings too!
I really appreciate the responses and time taken to do so. Any and all ideas wil be tried -- my wife is convinced it is "possessed". I have quit trying to convince her otherwise!
randyB
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Howdy,
It's only been 42k since last Full tune up...
I'm kind of late to this thread. I am a bit amazed that no one has suggested replacing the spark plugs. At least pull them and look at them. If the center electrode is rounded on the edges, replace them. Replacing plugs is neither expensive nor difficult and may save you a load of unnecessary troubleshooting if they actually resolve the issue for you.
--
Mr. Shannon DeWolfe -- I've taken to using mister because my name misleads folks on the WWW. I am a 53 year old fat man. ;-)
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Dangit, forgive the blank message ... I hit enter too quickly every time.
I am going to start anew tomorrow ... new cap, rotor, plugs, wires, air filter... see what that does. New fuel pump didn't help, cleaning under the coil didn't help ... I am at a loss now.
Thanks kindly to you and everyone else who took time to respond ... it is appreciated (again). If I find out what is going on, I will repost!
randyB
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hello
if you search lucids posts there is instructions on how to clean up the power stage, its part of the coil setup.
this has caused a few people here a problem.
our regina/rex car has needed less fixin than the bosch cars we have/had.
for some reason i dont like to admit it.
probably because there is more people here with bosch experience.
good luck
Mike
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