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> Warning- #043 MPS now list @$1,652.50, Get one while you can (used or rebuilt)
Bleyseng
post Jul 6 2005, 07:24 PM
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Woohoo, a euro MPS!

We are planning to come to the Netherlands in late Sept, soo will the 914/6 be running???

We should hook up then.

Wanna go to Spain? (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)
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JeffBowlsby
post Jul 7 2005, 07:10 AM
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QUOTE
The guys who have all the readings on MPS's is Jeff Bowlsby and (Geoff) Bleyseng. Hopefully they will share correct MPS readings (for a partnership or cut in the action). Makes sense to me if their involved (wire harness, testing equip. knowledge, etc.). Jeff & Geoff hope you don't mind using your names.  
 


Glad we could help out William. Actually the mps only had a subtle leak, it would have worked for a long time, but it was not right and I am glad you were able to replace it. I hope the replacement is a good one and it should last a loooong time. The orioginals seem to last 20-30 years.... (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)

I suspect the leak was from dry case seals...easy enough to repair.

All of the MPS values I have are available to anyone...they are direct from the D-Jet Master....Brad Anders website. I posted the link recently to the pulse width values chart for anyone tuning a stock FI using stock fuel pressure and injectors.
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Jeroen
post Jul 7 2005, 07:48 AM
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QUOTE (Bleyseng @ Jul 7 2005, 02:24 AM)
Woohoo, a euro MPS!

are they any different????
(I wouldn't know a 4 banger part if it bit me in the ass (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif))

QUOTE
We are planning to come to the Netherlands in late Sept, soo will the 914/6 be running???

Won't be running, but I should have it back from the bodyshop some time in august (keeping fingers x-ed) and I should have some time off in august to work on it...

QUOTE
We should hook up then.

Definately!

QUOTE
Wanna go to Spain? (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)

Tapas, paella (IMG:http://www.914world.com/bbs2/html/emoticons/chowtime.gif)
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rhodyguy
post Jul 7 2005, 08:02 AM
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Chimp Sanctuary NW. Check it out.
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i need to test the one that came off the 73'.

k
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Bleyseng
post Jul 7 2005, 08:12 AM
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Kevin, Just pump it to 15hg with a vacuum pump and let it sit for 5 minutes to see if it bleeds down.

Has the epoxy been removed and the machined plug drilled? If so it can be reset.


Yes Jeroen, Paella and tapas!! I'll let you know when and where as maybe you can sneak out for a little vacation with us.

The numbers I have found for the 037 MPS are:

.74 15hg
1.12 4hg
1.52 0hg

which means it is set up to run richer at idle and way richer at WOT


(IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)
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rhodyguy
post Jul 7 2005, 08:17 AM
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Chimp Sanctuary NW. Check it out.
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epoxy plug intact. if you're going to walkers this month can you bring your pump with you for a quick field check? if it holds vaccum, are there resistance values that need to be met to insure it's a servicable unit? pm sent in 2 minutes.

k
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MarkG
post Jul 7 2005, 10:09 AM
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This ain't good news...$1600!.

I have 2 rebuilt 043 MPS's ....one as a spare. I have been having idle problems even after $400 worth of new injectors installed Saturday. Just for the heck of it I swapped MPS's and all idle/power issues went away.

That means a rebuilt MPS has a life span of 250 miles! @$200+ per rebuild that adds up to several thousand dollars a year of normal driving.

Time to convert to carbs.....I already have over $2K invested on NEW D-Jet componants....talk about throwing good money after bad!

Maybe I SHOULD have kept the 308......(except the 914 is more fun to drive, albeit a little short on power compaired to the F car).
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airsix
post Jul 7 2005, 10:36 AM
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QUOTE (MarkG @ Jul 7 2005, 08:09 AM)
Time to convert to carbs.....I already have over $2K invested on NEW D-Jet componants....talk about throwing good money after bad!

Converting to carbs? (IMG:http://www.914world.com/bbs2/html/emoticons/barf.gif) Would you amputate your arm because of a hangnail? (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) (jk)
You could convert to megasquirt EFI for a couple hundred bucks (probably half the cost of carbs). That would be the cheapest EFI option and there are a dozen others. In this day and age there is no reason to put carbs on anything but chainsaws and weedwackers.

EFI good. Carbs bad.

-Ben M.
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Joe Bob
post Jul 7 2005, 10:44 AM
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QUOTE (MarkG @ Jul 7 2005, 08:09 AM)

Maybe I SHOULD have kept the 308......(except the 914 is more fun to drive, albeit a little short on power compaired to the F car).

Think of all the money you saved on gold chains and powder blue leisure suits....
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TJB/914
post Jul 7 2005, 11:58 AM
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MarkG & Mr. Z

Your comments owning a 308 made me chuckle. My brother had one & still has his gold chains & blue L-suit. I blame our mom for his downfall.

To all others.
This MPS price situtation is a "Wake Up Call" We need alternate solutions. Don't think about going carbs. We just need to find an inexpensive (cheaper) fix. Untill that happens start looking for spares to keep our 914's running.

Tom
BTW
Keep supporting our 914 vendor's. We need them.
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Brando
post Jul 7 2005, 12:01 PM
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Come out of the dark ages... come to the L-Jet side (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)
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Engman
post Jul 7 2005, 12:34 PM
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Someone (hint, hint) should look at using a more modern pressure sensor and adapt it to a plug and play unit. Could be a good mod.

Look here

M
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phantom914
post Jul 7 2005, 12:38 PM
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QUOTE (Engman @ Jul 7 2005, 10:34 AM)
Someone (hint, hint) should look at using a more modern pressure sensor and adapt it to a plug and play unit. Could be a good mod.

Look here

M

It's not so simple. Modern sensors have a voltage output. The MPS has a varying inductance that is part of a tank circuit that determines pulse width. For the trouble, might as well change to a new EFI system.


Andrew
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Bleyseng
post Jul 7 2005, 01:08 PM
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Those sensors work with pressure , not vacuum!

Kevin, I will be gone outta town that weekend (IMG:http://www.914world.com/bbs2/html/emoticons/dry.gif)
When is that BBQ gonna happen that you and DaveH promised??? timing is gud for this summer...lots of sun, no rain, hint hint.
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RustyWa
post Jul 7 2005, 02:04 PM
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QUOTE (rhodyguy @ Jul 7 2005, 07:17 AM)
if you're going to walkers this month can you bring your pump with you for a quick field check? if it holds vaccum, are there resistance values that need to be met to insure it's a servicable unit?
k

Kevin,

I plan on going to the swap meet. I can bring my vacuum pump along if you need one. Probably a good idea to just bring it so I can test any that might be for sale.
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MarkG
post Jul 7 2005, 09:02 PM
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Well, I just vacuum tested the Bret 043 MPS I had rebuilt via PP 250 miles ago (ironic = $1.00 per mile of service).....would not hold vacuum for more than 20 seconds......

The AA rebuilt MPS is doing fine so far @ 45 miles use.
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Bruce Allert
post Jul 7 2005, 11:25 PM
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QUOTE (Bleyseng @ Jul 7 2005, 12:08 PM)

When is that BBQ gonna happen that you and DaveH promised??? timing is gud for this summer...lots of sun, no rain, hint hint.

BAR-B-QUE??? (IMG:http://www.914world.com/bbs2/html/emoticons/beer3.gif) Someone mention BAR-B-QUE???

MMMMMMmmmmmmmm... give me a couple weeks notice & I'll make the journey for that!

Oh, and what's a good used MPS worth these days? I have one from my 1.7 that I think is fine but haven't done the vacuum test Geoff mentioned.

.........b
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Bleyseng
post Jul 7 2005, 11:35 PM
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$75


Come on, Kevin. What about that BBQ????
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dmenche914
post Jul 8 2005, 12:27 AM
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Funny, i have run my old MPS for ten years with no failure.

What could be wrong? there are two coils, they could short, or open electircally. the container could develop a vacuum leak, the diaphram can fail. the spring could change tension Dirt could get inside interfering with the movement

what would could cause each of these failures?

electric problems on the coils could be caused by an over voltage that melts the insulation or burns out the coil, the container could get a leak form vibration that owuld cause the body to rub on the car, wearing a hole.

the diaphram could fatigue, but mine has lasted a decade at least it might even be the original one, I do not know. the diaphram might corrode, but what from, storage conditions in the stock room? Did crud get in teh vacuum hose port and move around inside until it jammed the motion?

Spring tensin loss, high temperature could do that, but that temp would also melt the plactic parts, so that not likely.

this is a mystry alright.
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DNHunt
post Jul 8 2005, 07:48 AM
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Geoff

You already missed the Barbie. it was in May at Kevin's when all of the rhodys were blooming. he yard was spectacular.

My MPS is the size of a quarter and costs less than 20 bucks. It does respond to vacuum. 1 bar is 100 Kpa. The sensor will repond from 0 to 250 Kpa so that's 1 bar vacuum to 1.5 bar of boost (It would be fun to play with that side of the MPS). On decel my engine will pull as much as 84 Kpa of vacuum. Idle is around 67 Kpa of vacuum and WOT is about 1-3 Kpa of vacuum.

Dave
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