MPS Question, 1.7L vs. 2.0L Options

[Tom_T]

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

[dr914@autoatlanta.com]

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

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.

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?

[sfrenck]

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.

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

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

[914Sixer]

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

[drken]

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. (IMG:style_emoticons/default/piratenanner.gif) 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. (IMG:style_emoticons/default/beerchug.gif)

Ken