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Old 10-18-2019, 09:46 AM   #726
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Tom no 12 volts at the Lambda ECU is easy! You are almost there.
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Old 10-20-2019, 10:54 AM   #727
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A rainy and cold Saturday and I could have been sitting in a lawn chair on a golf course in South Carolina where it was raining harder.

Took a big nap and researched Frequency Valve operation.

The module pinout:

#2 and #4 O2 sensor input
#5 ground
#7 operating ground from thermal switch or micro switch
#8 12v power from System Relay
#15 ground to Frequency Valve for operation
#16 ground




The System Relay

#15 ground to Frequency Valve
#30 permanent 12v power
#85 ground
#86 12v power from fuel pump relay
#87 12v power to pin #8 of Module
#87a power to Frequency Valve



The schematic in the '81 Green Book does not have wire color codes. System relay pin 30 appears to be red in a large gauge, Pin 87 again is red and a large gauge. Pin 86 is blue/green, and pin 87a is green.

I believe I opened this relay and cleaned the contacts about 7 years ago. Probably should replace it. Bosch 0332015006 / Volvo 1324749.

Doesn't come up in IPD, Tasco or FCP in a search.

Anyone got one, preferable new?
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Last edited by TestPoint; 10-23-2019 at 03:41 PM..
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Old 10-23-2019, 03:42 PM   #728
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Nelson,

The System Relay is the middle one but since they clip onto the power buss bar they could get swapped.
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Old 10-23-2019, 09:13 PM   #729
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Tom - can you temporarily jumper it to confirm it's the problem before seeking a replacement?
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Old 10-27-2019, 03:09 PM   #730
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Replaced the plugs and O2 sensor today while awaiting the very rare OEM Bosch metal case System Relay. Never mind the picture on ebay, if you order a 006 relay at the moment it is going to come in a blue plastic housing.



Really strange that #6 cylinder was far more sooted up than others and #4 appeared that it had never been fired. Injectors were new Bosch 4 years and about a gallon of gas ago. Fuel Distributor has been commercially rebuilt and I assume calibrated. I used 'commercially' rebuilt rather than 'professionally' rebuilt since JayTan is no longer in business.

Last edited by TestPoint; 10-27-2019 at 05:45 PM..
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Old 10-28-2019, 07:35 PM   #731
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Would anyone like to comment on the difference between the #4 and #6 plugs? Number 4 appears never to have been fired. Number 6 looks like it is running very rich.




This car has only been driven perhaps a hundred miles since these plugs were changed.

Do I need to get the baby bottles out again?
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Old 10-28-2019, 07:58 PM   #732
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I’d try and get it going again Tom with some consistency and THEN try to assess things like the plugs. Not driving it regularly is, of course, tough in one. And lots of things can cause a plug to look like that - a bit of coolant in that cylinder could do that as well. You gotta get it going.

You see my question above?
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Old 10-28-2019, 08:24 PM   #733
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My very rare OEM metal case 006 relay is due in maybe tomorrow. Sorta put the Bertone in second place. I have about a hundred little short Boy/Girl Scout people showing up in 2 weeks and I have a restroom to complete.

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Old 10-28-2019, 10:09 PM   #734
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I appreciate your commitment to the Scouts.... having done around 8 years with Webelos/Scouts as a leader, they need care and support from adults such as yourself. Kudos!

For sure, that single plug wasn't firing, and/or was washed out by a coolant leak as Michael opined. Did you ever put a clamp on timing light on each wire/plug combo? Did this V6 ever run long enough to determine if it consumed coolant? My few experiences with coolant leaks (HG's) showed a white insulator of the plugs.... should be plenty o' online pics showing the color of the insulators and assigned cause. We're pulling for you Tom!
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Old 10-24-2020, 07:19 PM   #735
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The problem with the Frequency Valve was the computer. It was the one that came with the car and has worked and not worked over the years. It was not the correct one anyway. It was for a VW 4 cylinder. I installed a correct one and the FV vibrates. Still am unsure that it is passing gas.

Here is my shot glass measurements of fuel distribution cylinders 1 - 6. This is at idle for enough time to fill the baby bottles to the amount needed for shot glass measurements. Obviously, the fuel distributor is in trouble.



First thing is to get the 2 year old gas out of the tank and check for debris. Pulled the hose off the back of the pressure pump and let the lift pump suck the tank dry into a 16 gallon storage container. No trash but old gas.

After the shot glass fuel test I had to break the Fuel Distributor open. It appears that the commercial rebuilder used JB Weld as the sealing product. It was a mess in there but no obvious failure. O rings on the center hub were 'rusty' but there was no indication that would have caused the uneven fuel distribution. Two of the small O rings on the oblong ports were broken but again that wouldn't seem like a cause of such uneven distribution. The very fine vertical splits within the ports did not appear blocked when inspected by shining a very strong light through them. Each had a sharp, unobstructed light image. That is the first place I expected to find blockage.

The nozzles on the fuel pressure volume regulators all were dead level with the cast iron surface. The springs and caps are evenly the 5.2-3mm specified in the rebuild YouTube video.

The nozzle's passages apparently do not go straight through. Even the finest wire I could come up with, from a fine wire wheel, did not pass through. Much smaller than the opening but not, apparently directly connected to the outside. That is where I expected to find another obstruction or other issues with the fuel volume.



I placed the upper half on a paper towel and blew air through the injector ports down into the chamber of the FD. Got spots of trash at each port.



Obviously, the seal is going to be based on a sealant applied to the iron top and bottom mating with the stainless steel shim. That is the question for the night . . . what sealant? I have read Indian Head Shellac, and red thread locker. Never heard of JB Weld before.

What say the experts?

The JB Weld was really a mess to clean up.

BEFORE:



AFTER:



Note the rough surface of the cast iron face. No signs of precision machining to ensure no leaks. This unit had to have come from Bosch like that.

The answer to the flange sealant is Loctite 515. Specified exactly for steel to steel seal with an one hour work time and 24 hour full pressure set time.

My best effort at a very thin layer of sealant.



Probably too much. There is a very small hole in the stainless steel shim that feeds pressure but not much gas to the CPR. I had great concern about blocking that hole.



Got it all together and pumped another couple gallons of Chevron Techron through the tank, pumps, filter, fuel distributor and injectors.

Here are the results:

At idle:



At about 50% throttle:



At full throttle:



Compared to pre rebuild that is wonderful.


Last edited by TestPoint; 10-30-2020 at 07:13 PM..
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Old 10-25-2020, 11:08 AM   #736
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I admire your tenacity. I'm curious if you numbered the ports before disassembly and checked those with the fuel output of each one. What I'm trying to find out if in fact the o rings were the problem, broken o ring leaking to much fuel and starving the others? Also from my own research I never seen mention of a sealant but good know what product does work.
Asking around about a rebuilder only the Delorean people in Texas came up but they use an outside company .
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Old 10-25-2020, 12:59 PM   #737
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Tom- great work. Those fuel distributors can get nasty. When you get it back together, get some Redline fuel injector cleaner in a full tank along with some Marvel Mystery Oil. I do this every 3 months about oil change time. The Redline is a detergent, not a solvent, so it won’t deteriorate the rubber parts. Fuel injector cleaning services often use this as their cleaning solution. The Marvel Mystery oil helps lubricate the kjet system. Also, I would try to keep non- ethanol gas in it. There is a station near me and that’s all I put in my 242 Turbo.
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Old 10-25-2020, 03:23 PM   #738
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I found a rebuilder in Fairhope, AL. No history or on-line reviews but seems to make a living working on the Bosch stuff. $600

After my quasi-success I would say it is not that hard.

The shot glasses are in order left to right, 1-6. I was trying to be careful and document anything that could be associated with the major difference between 1 and 6.

Before I got down to the fine measurements I did pump nearly 2 gallons of high concentration Tectron laced gas through the FD and injectors at max throttle. I did swap the injectors between the two ports and they exhibited the same volume disparity clearly indicating that it was the FD and not the injectors. Initially, the #6 injector dripped at idle while all the rest had a fog/spray. After the 2 gal flush it had a spray although much weaker than the rest.

The core and little 'O' rings were beyond including in that individual port analysis as they sorta all came off when the core was removed from the top section. The cuts really were not visible until inspected off the oblong ports.



Blowing air through the FI ports onto a clean paper towel clearly displayed trash in 4 of the 6 nipples but, again, no big identified link to the #1 and FD issue.



The Loctite specifications for the 515 is that it is for sealing STEEL, not aluminum, not plastic machined surfaces. Gave a work time of 1 hour and a set to full pressure in 24. Sounds pretty much what I was looking for. Found the reference in the British Delorean forum. http://www.deloreaneurotec.uk/ucp.php?mode=register

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Old 10-26-2020, 05:48 PM   #739
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Did you get the correct ecm?
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Old 10-26-2020, 07:10 PM   #740
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Yes, I have the correct ECM for this year and engine and the FV vibrates but with all the junk that has been pumped through it I do not have high confidence that it operates within whatever specs exist.

I know that the FV is simply an electric fuel injector but does it have anything, like a normal FI pintle, that would restrict fuel from returning? It must have an open/closed port operated by the coil just like any FI.

I ask because this the ONLY thing in the Bosch CI system that has not been replaced with new or serviced. No symptoms to fix at the moment, just education.

Gas cap to FI, everything is new or rebuilt.

I have not started it since putting it all back together. Maybe tomorrow.

I know it is hard to believe but I really do have a life beyond this car.
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Old 11-12-2020, 06:45 PM   #741
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The leaf color was great this year but now they are about 80% on the ground . . . on the 400 foot driveway . . . on the roof and in the gutters.

Anyway, after the fuel distributor rebuild it starts instantly, idles correctly, backs out of the garage and got a bath for the first time in years. Haven't taken it out for a drive yet because I want to go through all the little check list stuff. Oil? Water? PS fluid? Transmission fluid? Brake fluid? Ignition timing.

But ain't she pretty . . . .


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Old 11-12-2020, 08:47 PM   #742
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That looks amazing, and I'm not the biggest fan of 262s. Great work.
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Old 11-12-2020, 08:57 PM   #743
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Picture perfect!
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Old 11-12-2020, 10:30 PM   #744
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Brings back old memories. I sold one just like yours to a friend when I was a tech at the dealer. He wanted it for a present for his wife. Three weeks later it was on the Buick used car lot. The wife had one of those hairdos that was all piled up. She could not fit in the car. I ended up with it years later.
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Old 11-12-2020, 10:34 PM   #745
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Looks great! Glad to hear it moving again
"Oh my!"was Nanci's comment.
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