posted by
someone claiming to be Frenchie
on
Wed Sep 9 14:19 CST 2020 [ RELATED]
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Hello, Thibaut, stuck in France here, my 240 GLT/B23/ LH2.4 was resurrected after a long period... started with the crankshaft timing sensor replacement (easier said...), started straight away, now the issue is a no cold start at all.
Checking the fuel line, uncoupling the return line from the FPR into a jug it started straight away, I then blow the return line, reconnected, restarted and after a couple minutes it just died. Uncoupled the return line, noticed it is under some low pressure (?), attached a transparent tube to the jug, plenty of air bubble.
Reconnected the transparent tube to the return line, plenty of air bubble, and it stalled again... It seems it only works when there is no back pressure at all in the return line?
There is no gasoline leak from the FPR (standard 3.0 bar 0280 160 294) to the vacuum hose.
Question is: is it normal to have some level of back pressure in the return line?
Should I go straight and replace the FPR which should handle some back pressure?
Anything to do with the amount of bubbles in the line?
Are they an issue coming soon with the pumps/filter/lines?
Beforer investigating the tank, fuel lines and various item with poor access, I thought it might be a common issue...
Thank you for reading and some tips to avoid newbie's errors.
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I think the vapor or air bubbles you're seeing is the clue, and that it is insufficient fuel pressure before the regulator. Just because the car will run isn't enough to confirm fuel pressure. Bubbles indicate lack of feed to the main pressure pump from the tank, and are accompanied by the sound of the main pump's rollers cavitating (making a rough sound rather than a smooth hum).
If you had enough pressure ahead of the regulator, a blocked return line would have the same amount, and the fuel rail would be overpressured.
Here in the states, LH was just introduced in '82 and was only on version 2.0 in '83. We got LH2.4 in '89.
This is for my friend Machine Man:
--
Art Benstein near Baltimore
A man's knowledge can never outweigh his experience.
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Hi Art,
Got your message and see the pictures of the K Jet system.
It’s Funny, they actually show a person blowing the line with lips. Now that’s what I call getting up close and personalize!
I’m sure glad it was not any more intimate, to become a porn illustration. (:-)
I wonder what the mechanics service code is used on a dealers Charge ticket? (:-o)
He has put the post under the tab as a 1983.
He said he changed out a CPS and the term FPR so I slid over into the LH mode of thinking.
I asked for more information on the condition of the car.
You are right about bubbles and cavitation.
I was wondering about the age of the gasoline and like you, the age of those pumps.
Wasn’t the first LH’s a 1.0 right after the K Jet? That is, if we got them in America?
Since you are in the know by having owned one of these along the way.
My 1984 is a 2.0 and my 1986 is a 2.2. My nineties, (3), cars all have 016 AMM.
The 1984 has the AMM Bosch 002 and the 1986 has the Bosch 007 AMM.
Have you ever posted that the 002 can be substituted with a 007 if the pins in the connector were rearranged around?
I read it someplace.
If so, wasn’t it only one pair or does only one get eliminated?
Volvo was playing around with heads, cams and turbos all across the B21, B23 and the B230 engines
Bosch was just trying to keep up with Volvo sales or was the tail on the dog, up ahead of Volvo?
What do you get from this LH history?
For a short while there seem to advertising on TV that they could “blow the doors off V8’s.”
It must have been on their “turbo excursion” into rising sales!
Phil
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Hey Phil,
You mean to tell the Volvo world you've attained retirement age without ever having tasted gasoline? I understand it would cause cancer in California where you live.
Yes, the LH1.0 was introduced in California for 1982, then in 1983 for the rest of the country as LH2, later referred to as LH2.0. We saw no more B23 blocks after 1984, and I've never seen one tapped for a crank sensor, but you know, cars do get modified, fuel systems get "upgraded."
I've used an -007 in an LH2.4 car inadvertently (bought a 91 that came like that) but never tried re-pinning one to use to replace an -002 for LH2.0. I imagine it could work after a fashion, just not ideally, as the two meters have different pressure/voltage curves. Your re-pinning recollection probably comes from the method to replace LH2.0's components with LH2.2 parts without changing out the cable.
Back to the topic, the bubbles indicate the main pump is sucking from a nearly empty tank, one with an inoperative lift pump, or likely, with a leaking hose between sender and lift pump. The main pump has no ability to deal with vapor.
--
Art Benstein near Baltimore
The Michelin Man (Bibendum) is white because his design pre-dates carbon-black tires. (Trivia from Rock Auto's Newsletter)
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Thanks Art, for slipping a little on the topic at hand but he has the different engine block or something to help this one along.
We need more information about whatever is folded into his pastry while being there in France.
I could be a USA vehicle too!
Europe buys used cars and motorcycles here and containerizes them in bulk to there.
Even better, used Motorhomes go to Australia from RV clubs and rentals. It is the only way to buy them there! Taxes are crazy on them going directly there new.
So anything is possible.
Yes,
I have tasted and have worn gasoline on many occasions.
I never the hand cleaner as a chaser on purpose.
Well ... except when I forget that I hadn’t used any soap and water to get that stuff off completely!
It may smell like oranges but it’s bitter, for a reason I’ll bet!
Yes I was asking, if the 007 LH 2.2 could be backward compatible to the 002 LH 2.0 cable.
I have several 016 because as they cover half of my fleet.
Apparently you didn’t like the 007 in the place of the 016 for the 1991.
It was hoping for a recollection and I not a brain infarction.
I have been accused of “smoking something” on the board before, as why I brought that last bit up!
I don’t drink or smoke anything, except what’s in California’s air this week.
Just being in California is cancerous but conscious!
Everywhere else is “Unknowingly” given a clean bill of health, until you hear the words, Hey! what kind of utility pipes, where? Or of a Storage area of a boom, someplace?
Thanks for your wisdom!
Phil
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Hi,
If this is a 1983 car, is does not have a LH 2.4, so this sounds like a transplanted system.
You said you blew air down the return line ... with what? I hope you used compressed air and not some other French technique with your lips! (:-).
The return line should blow free and clear with the gas cap removed to make it easier, as the tank it’s designed to hold a certain amount of pressure for an evaporative canister system.
Now, if you are truly in France, did use lips? If so, then you might be able to get them around the gas caps threaded end portion and check to see if it will let air go towards and into the tank but not out. There are four holes, you have to cover over all at once, deliciously!
(:-)
There is a rubber ring around the outside to fit the filler neck. It should not have any cracks or the evaporative system will fail inspections when they pressurize the tank as a whole.
As far as I know the FPR will not just shut the off. What does figures into these is Poor acceleration, lean or rich idles and hard starting, after a prolongs shut downs.
First thought is electrical, loose connection or corrosion someplace, after sitting under what kind of environment, is my Thinking or question.
Newbie errors always include not enough information but it come with the territory!
If you would like you can share more information about the condition of key things to make it run. Electrical as in ignition, mechanical signs of neglect as timing belt and a like.
Fuel need to be fresh too!
That affects filters if it really old!
Enjoy
Phil
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