 mps swap, 1.7 in 2.0 |
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| TheCabinetmaker |
 Aug 24 2003, 12:33 PM
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#1
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I drive my car everyday  Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666  |
My 2.0 started running rough a week or so ago, and I started checking everything by process of elimination.
Valves ok timing ok dwell ok fuel pressure ok Tps ok c.o. ok Purchased new vacuum pump today. Guess what? Zippo. Nada. Nothing. would not even pump up. Grabbed a mps from a 1.7. held at 20 for six minutes. Car runs much better, but not perfect. are they different? can it be readjusted to work on the 2 litre? |
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| 2teeners |
Aug 24 2003, 04:13 PM
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#2
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Member Group: Members Posts: 79 Joined: 2-January 03 From: Arlington DFW, TX Member No.: 78 |
It will need adjusting, or it will run too lean.
my 2.0 had a 1.7 mps for years, and I didn't know it, but it always ran hotter than i was comfortable with. eventually i burned some valves on a hot Texas summer day and had to rebuild the engine. when i finally realized the problem and adjusted the MPS with the engine running, it took a substantial adjustment to find the fastest running speed. The engine revs went from 2200 to 3500 (no load) at the same throttle position. But everything i've read indicates it's adjustment that makes the unit engine specific. (IMG:style_emoticons/default/ohmy.gif) |
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| anthony |
Aug 24 2003, 04:58 PM
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#3
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2270 club Group: Benefactors Posts: 3,107 Joined: 1-February 03 From: SF Bay Area, CA Member No.: 218  |
I have a 049 1.7L MPS running in place of the original '74 2L 043 MPS. It works fine. Brad Anders told me that it's almost exactly the same and shouldn't pose any problems for the engine.
Check his compatibility chart: http://members.rennlist.com/pbanders/DJetP...m#Compatibility |
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| Bleyseng |
Aug 24 2003, 05:13 PM
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#4
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Aircooled Baby! Group: Members Posts: 13,034 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
It is exactly the same only at idle. The part load is different with the 1.7l one leaner and at WOT the 1.7L MPS is WAY leaner.
You are playing with fire as the engine will run hotter and could drop a valve seat.(as Dave Darling). I have the same basic test equipment as Brad A. and have tested lots of factory sealed units and rebuilts. Get the right one as the factory had a reason why they are different numbers for different engines Geoff |
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| TheCabinetmaker |
Aug 24 2003, 05:16 PM
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#5
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
Thanks Geoff, I think that's the answer I was looking for.
Curt |
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