While doing some work on the car last night, I noticed my MPS # was 0 280 100 049 (022 906 051E). I have a 73 2.0L, and according to PBanders site, the correct MPS # is 0 280 100 037 (022 906 051C).

Anyone know how the 049 part will effect the running of my engine vs. the correct 037 part?

Thanks
Rich

Better take inventory of all your FI parts, esp. the CHT and the ECU, and make sure that everything "matches" per the pbanders information. That MPS won't work on your car (unless it's been opened up and adjusted by someone who knows what they are doing - and even then I'm not sure).

In my opinion - your CHT is the smoking gun. If it is the 0 280 130 017 (and it works correctly), you should go ahead and get yourself an 037 MPS. Mine was toast (resistance readings taken with an ohm meter were out of spec) - and it seemed like it was an impossible part to find. Ended up going with the pbanders suggestion of changing to a '74 2.0L setup.

Scott,
Thanks for the quick feedback, I'll pull the CHT and check it tonight. It is very unlikely the MPS installed on my car has been adjusted.

Just to be clear: when you say you went to a 74 setup, that means you have:

• MPS: 0 280 100 043
• CHT: 0 280 130 003 / 0 280 130 012
• ECU: 0 280 000 043

Anything else I'd need to swap out?

That's the setup I went to... nothing else needs to be changed. Be careful with your CHT when you pull it!! I've read nasty stories on this site with people stripping threads, breaking the head of the CHT off and not being able to get the rest out of the engine, etc. Use a deep socket so that you can coil up the wire from the CHT inside of it.

Check the resistance readings on the CHT vs. what pbanders site says for the CHT in ice water, room temp, and boiling water to make sure the piece is working correctly. I suppose you could check the room temp value and the warmed up engine value with the CHT in the car (I can also check the ice bath value in my unheated garage).

Oh yeah, check your distributor number too. You'll want the 039 905 205 or 205A.

The 049 is actually for a 1.7 but will work fine for the 2.0 the main difference is the enrichment for the increased displacement. The only downside is that you may not have the acceleration of the 2.0 pressure sensor the 043. The 037 so called "european" pressure sensor will provide increased power at the top end

George
Seems like the 043 is more available than the 037 (a unicorn). Would you recommend the 043 over the 049 for a 73 2.0L application?

You can get rebuilt MPS's from Fuel Injection Corp via PartsHeaven. Cost is <$200 after core trade in (for the 037 or 043). The unicorn is the 017 CHT.

I would install the 037 in my personal car yes. One can certainly notice the difference in top end (high rpm) power FI rebuilds them but these days with the inferior quality of the diaphragms, they actually do not work as well as the originals. If you can find a good original one (037) you would be better off. We of course sell the FI 049, 043, and 037.

...I guess to answer your questions....043

Thanks Ray. I'll keep an eye out for one.

I don't know - I still think the answer is get the 037 MPS if you have the working 017 CHT.

I didn't think my reading comprehension was that great....but....I think rich is asking if it was "between" him using a 043 or a 049, which one would be better!
....the answer would be "043"

reading deeper, seems finding a 037 would be great, not that easy for the right price?

an 043 is more common and could be found for the right price....

he has an 049....so....should he keep running the 049, or pick up a 043?

I was trying to help Rich out but my 037 doesnt hold pressure

I recommended that he go with the 043 back in Posts #2 and #4. Guess it boils down to if you trust how FIC rebuilds and calibrates MPS's, though. I figured that I'd rather go with a rebuilt unit and the 18 month warranty than get an original one with unknown life expectancy.

Click to view attachment

Tried to PM it but not so much

can't we go to Radio Shack and make a bunch of those.....

Andy
Did you measure resistance from the electrical connection to ground? If the thermistor is still good, I can salvage that unit by rebuilding the pigtail.

Radioshack < digikey!

Hey Ray ... just pick up a rheostat and wire it in. You can fine tune while driving.

Of course PG will roll over and swear that it's not OE and therefore makes the car worthless.

I believe that resistor is 270 ohms, but again, you can't replace it with a current 270 ohm resistor as it is not OE.

Over $400 not including core charge!! At that point I'm well on my way to an SDS system...

I just bought a pack of 270 ohm resistors at Radio Shack for .99 cents plus tax...soldered one in the line from CHT to ECU...Makes the car run like new!! Have the 037 MPS....they are about the size of a kernel of rice! with a wire lead on each end.....shrink cover it and your good to go!

lew

914sixer - Mark Heard currently has an NOS 037 MPS FS in the classifieds IIRC, or PM him.

for all 2.0, here is the order new bosch: 037 with the 270 ohm resister first, 037 by itself second, 043 with the 270 ohm resistor third and 043 by itself finally 049 only if you cannot find and or afford one of the first three setups. Then I would start it all over again with the real good used untampered with stuff and then finally the rebuilt stuff

We just went through this pricing question last week.... you have to call PartsHeaven (FIC reseller) and talk to someone. The price is less than $200 with the core charge.

www.914world.com/bbs2/index.php?showtopic=115585&st=20

Or go to automotion.com for $199 www.automotion.com/catalogsearch/result/?search_year=ALL&search_model_id=All&q=pressure+sensor

I have the unicorn parts!

NOS 037 MPS
NOS 017 Head Sensor
NOS Resistor
Rebuilt CU13 From Bosch
NEW ECU Harness from Jeff Bowlsby
NOS Fuel Injectors
Rebuilt distributor with NOS FI Points

Just another data point to add. I have been struggling to get my 74 2.0 to run right. Never ran right since the day I bought it last fall. Thought I had checked everything-new injection trigger points made a small improvement, then I realized I never actually tested the MPS. Found that it leaked down at a rate of 5mm Hg every 25 secs, so I ordered a rebuilt unit from Parts Heaven (super nice service, BTW). I decided to try an 037 unit, since they had one on the shelf. I made up my own 270 ohm resistor. My car originally had the 043 sensor and otherwise late 74 injection setup (although I have never pulled the head temp sensor since it measured to spec).
Hooked it up first without the resistor and WOW! Ran great-smooth and quick throttle response. I added the resistor and it didn't run as well, so I took it back out. So, I wonder if the rebuilt MPS units are really rebuilt to the spec of the part number, or just kind of "one size fits all"? Maybe sometime I'll hook up a wideband O2 sensor and gather some A/F ratio data.
So, if anybody is dealing with a little stumbling on acceleration, or a little popping out the exhaust on steady throttle, test your MPS. I now realize that those were due to overly rich running, but I didn't recognize or know that rich running would cause those symptoms. Makes perfect sense, now.

Ken