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"Siezed mixture screw" and Delorean[ALL/1998] posted by Owen Woodland on
Tuesday, 25 November 1997, at 4:32 a.m.
I was reading through some other messages on the board here (been a bit reticent lately, I'm on holidays already!), and noticed that Dirk someone or other (sorry, I'm too lazy to go back and check the last name) commenting that the PRV 2.8 litre v6 used in the volvos was also the base engine for the Delorean!! Suffice it to say that I didn't know this. The closest I ever got to a Delorean (living in Australia and all) was seeing it on "Back to the Future" ha ha. What did happen to that crowd anyway? My brother said something to the effect of that they ran out of money because they made crappy cars....
Anyway, to business..
I had the (leaky, leaky) injectors on the B21e ('76) changed for second hand "good" injectors (HA! But I'm a bit low on cash for new ones at this stage), but I am still (but to a lesser extent) having the same woes starting in the heat, but more consistenly I am getting a bad idle at unpredictable times (it could be hot/cold engine or weather), when the idle goes down to 5-600 rpm (or lower!!) by the tach, and the engine starts shuddering (more than usual). I took it back, and the mechanic said that the problem (#1 at least) was that the mixture was running lean, and this was causing my idling problems. Fine I says. Fix it.
Problem 1: I presume he's talking about the CO content adjustment, being fuel injected and all... am I correct in this presumption?
Problem 2: The mixture screw on the intake unit is SIEZED (wouldn't you know it). I was told previously that my CO content screw was siezed (by another mechanic), so I presume that's what they're talking about. However, at $A 65 to fix it, replacing the unit with a second hand one that is, it seems a bit steep because the mech. isn't even totally sure if this is the problem (cuss it)./
Does anyone have any comments on the possible causes?
Also, is it just me or all the damn volvo 4 cylinder engines idle like turkeys? I mean my engine is always quivering around (enough to make the car shift ever so slightly) when you are at traffic lights, etc. It always smooths out at 1500 revs or so. It seems like a pretty poor design if they do.
Well, that's my gripes. Get to it people!!
Thanks,
Owen in Australia (I got the idea from Paul in Santa Ana, thanks)
Re: "Siezed mixture screw" and Delorean[ALL/1998] posted by Topi on
Tuesday, 25 November 1997, at 9:51 a.m.
Volvo CIS (mechanical FI) idles bad. It's normal.... To adjust CO do this: 1. Buy Foster beer for $ 65. 2. Remove CIS unit 3. Strip the housing so you can see the CO adjustment screw
4. Use plyers to turn the screw (one full turn should be enough, check which way - I don't remember) 5. Lube the screw so you can do it from the top, if needed, after assembly. Many times mechanics don't use metric allen tool to adjust and that ruins the screw head. DeLorean - well, John tried to finance automobile business by selling coce.... FEDs didn't agree.....The car wasn't that bad at all, only the "fit & finish".
Re: "Siezed mixture screw" and Delorean[ALL/1998] posted by Mark Klein on
Tuesday, 25 November 1997, at 9:35 p.m.
You should be able to free up the adjustment screw by spraying a little carb cleaner down in the hole. Let it sit for a minute or two and take a pick of some type which can reach the adjuster screw. you should be able to clean out the head of the screw enough to get it to turn with the correct (3mm) hex wrench. This adjustment can be very sensitive 1/8 turn can accomplish a lot. Turn it just enough to get it to idle smoother.
Also make sure the throttle housing/plate is clean. This can have a significant effect on idle speed and cold starting/stalling.
DeLoreans. Boy what a joke. Quite the conglomeration of other peoples parts.Who klnows what they could've been if they had adequate legal financing.
Re: "Siezed mixture screw" and Delorean[ALL/1998] posted by Topi on
Tuesday, 25 November 1997, at 11:35 p.m.
Mark's rigth! 4-cyl CIS CO is sensitive. It's the damn DeLorean V6 you can turn a full turn....I wonder if they still have few hundred DeLorean motors in Ohio? I bought two. They came with all accessories. Price was $ 1100/each for brand new motor! They were illegal 2.7 liters, from Renault A310 Alpine and Renault TS30. Real fast and powerfull. Not DOT & CARB certified, so they ended beeing auctioned off. And other DeLorean scam, I guess...
Re: "Siezed mixture screw" and Delorean[ALL/1998] posted by Dirk Mooibroek on
Wednesday, 26 November 1997, at 6:56 a.m.
As far as I know i have not seen any around these parts. I live in cincinnati and have been numerous times all over Ohio on auto searches.
Carb Cleaner, eh?[ALL/1998] posted by Owen Woodland on
Thursday, 27 November 1997, at 4:45 p.m.
Would a product such as WD-40 (I'm pretty sure it's called the same thing in the U.S) work? I mean, I have that, whereas I'd have to go and buy carb cleaner.
Thanks,
Owen
Re: Carb Cleaner, eh?[ALL/1998] posted by Mark Klein on
Thursday, 27 November 1997, at 8:19 p.m.
No, WD-40 would be good if it were seized in place due to corrosion. The screw isn't seized, its just a bitch trying to get an allen wrench in the head of it. Its full of gunk. The carb cleaner will soften the debris plugging the head of the adjuster enough to facilitate cleaning it out so the wrench can fit it again.
Re: Carb Cleaner, eh?[ALL/1998] posted by Owen Woodland on
Friday, 28 November 1997, at 4:17 p.m.
Err.... but the screw is seized, as I mentioned.... The allen key goes in just fine. It probably has something to do with the fact that some neanderthal in the past decided to leave the cover cap off the little hole. I tried turning the screw yesterday, and apart from the fact that it was really cramped (and thus hard to get leverage upon), the screw did in fact seem to be stuck. So, once again, is WD-40 ok or is it going to have harmful effects upon the fuel system, since we are getting towards the danger zone, near the air intake etc?
I really hope we are talking about the same thing here.
Thanks,
Owen in Australia
Re: Carb Cleaner, eh?[ALL/1998] posted by Glenn Goodspeed on
Friday, 28 November 1997, at 6:52 p.m.
WD-40 is good for loosening screws locked by rust. Only takes a little, but treatments repeated every two or three days might be necessary. Most of it evaporates quickly, so no worry about it getting into the fuel system. -Glenn.
Goodspeed's Volvo 1800 Newsletter
Re: Carb Cleaner, eh?[ALL/1998] posted by Mark Klein on
Friday, 28 November 1997, at 9:36 p.m.
Yes we are talking about the same thing. I must apologize. I was generalizing your problem. 99% of the cars which can't be adjusted is due to the screw head getting filled up with gunk and therefore, not allowing the key to be inserted enough to turn the adjuster.
WD-40 should work fine. If you can get the key in and use a pliers to move it back and forth taking note of the "beginning" position. Then adjust it accordingly. WD-40 won't hurt the fuel system at all. All the excess which drips off will end up at the bottom of the intake tract/boot anyway.
Re: Carb Cleaner, eh?[ALL/1998] posted by paul mohney on
Monday, 1 December 1997, at 9:05 p.m.
I am puzzled: (not that this is unusual ) , I've been following, this thread adn it seems to be the consensus that this variety of volvo motor generally idles/runs like crap and that it is designed like that.
I am not certified by any one , exceept Caterpillar, but I had a 78 240DL (until it was stolen ) and it purred likle a large cat hot or cold day or night , I ve run 544's 122,124's 145's and if tuned and taken care of run well .
I understand about mysteries, and ghosts in the machine, but if they designeds a piece of crap why didi we but it ?
About your shake rattling and rolling , please check all of the obvious, stuff , and check connections that may look ok but but are spurious . have someone trustworthy check your Co output and maybe have it scoped to check out the not so obvious >
Let me know how it goes Paul in Santa Ana
Re: Carb Cleaner, eh?[ALL/1998] posted by Mark Klein on
Friday, 5 December 1997, at 10:12 p.m.
Obviously they weren't designed to idle like shit but with the mileage they're getting to accumulate in the last 15+ years, things wear out. There is soooo much which can go just wrong enough to have adverse effects to idle quality, it can be a drawn out ghost chase. Anything from a microscopic piece of trash in the wrong place to fuel pressure problems to worn injectors to air leaks to.... well, you get the idea. When they are right, they run very well.
Re: Carb Cleaner, eh?[ALL/1998] posted by paul mohney on
Saturday, 6 December 1997, at 1:03 a.m.
Volvos
I beleive an live for nearly ever I had a 71 164 and eventually just got tired of driving it i put something like 5000,000 miles on it,
Things wear out but I have found if you are persistent you canr prevail.
and eventually bring the motor back into a good running condition .
this is concurent with the curse of owning tools and being way to cheap to pay someone else 's shop rates to get your car runung
Ichased a ghost for six weeks when i was putting my wife's frankenstein together, , but it lives and thanks to a new friend in the U.K.
i now know more than i wanted about d/jet injection
Re: Carb Cleaner, eh?[ALL/1998] posted by Mark Klein on
Saturday, 6 December 1997, at 10:18 p.m.
Wasn't yours the one which would only run on 3 cylinders after a bunch of work? What did the problem end up being?
Re: Carb Cleaner, eh?[ALL/1998] posted by paul mohney on
Sunday, 7 December 1997, at 7:48 p.m.
No that was the thread of "ghosts in the 1800 " As i recall you read the alt. user pages also my tale was told in the "Idiot in training " posting there .
After about 6 weeks of tracing and repairing wires , and looking for problems with the injection system it turned out I was barking up the wrong tree ( although I have totally sanitized the injection wiring and components,)
I had a bad fuel pump relay , and a wire going bare, blowing the panel fuse.
and then it would only run in fits and starts, (dare I admit this ? ) the gas tank was empty, My wife thought I had finally snapped, I was laying under the car laughing as only one possesed, by volvomania can. ( the gauge showed 1/2
tank and the lady i bought it from said it had 1/2 tank {honest } )
Well it runs good now, ( all it needs is a heater fan )
I owe a huge thanks to L. Wilkerson on the other place, a very patient man residing in England.
With any luck all of the herd will stay in one piece through the holiday season
Re: Carb Cleaner, eh?[ALL/1998] posted by Tom McGlynn on
Monday, 8 December 1997, at 11:39 p.m.
Mark - I was the one with the 83 240 "3" cylinder. It turned out to be after-
market wires with the plug cage shorting to the head. Finally got it on a scope
and saw not only the dead cylinder, but the other KVA levels barely registering;
but laying the plug on the cylinder showed a nice blue spark. The wires had about 20k on them and to make it worse, when I first started this little
adventure, a Volvo mechanic mentioned in passing that cars of my vintage didn't
react well to aftermarket wires. And I thought he was just blowing smoke. If
nothing else I managed to squeeze in all the engine maintenance I had neglected
for too long, and it now runs like it's ready for another 200k miles. Tom