74 2.0L, Running Very Rich, owner quite confused, need diagnostic help |
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74 2.0L, Running Very Rich, owner quite confused, need diagnostic help |
drumsticks2112 |
Sep 20 2009, 12:56 PM
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#1
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Newbie Group: Members Posts: 7 Joined: 29-October 08 From: New London Member No.: 9,704 Region Association: Upper MidWest |
Car fires without a problem, but idles quite rough, and runs very rich, so much so that when the it settles down to normal idles, it floods out. MPS was replaced with a used but tested one recently. When it was last running ( a year ago) it ran a little rich, but nothing like this.
As of now, the CHT is not connected. When it is connected, the RPMs jump up to 4000 and stay there. When the CHT is bypassed with direct grounding of the harness, the results are the same as with the sensor being disconnected. I have no reason to suspect the injectors, FPR, Decel Valve, or the MPS. Any and all advice is welcome. -Todd |
tod914 |
Sep 23 2009, 10:26 PM
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#2
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Advanced Member Group: Members Posts: 3,755 Joined: 19-January 03 From: Lincoln Park, NJ Member No.: 170 |
Compliments of Dave. http://www.pelicanparts.com/914/technical_...4_20FI_diag.htm
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drumsticks2112 |
Sep 23 2009, 10:58 PM
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#3
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Newbie Group: Members Posts: 7 Joined: 29-October 08 From: New London Member No.: 9,704 Region Association: Upper MidWest |
Excellent! Thank you, I will get right to work. -Todd |
CHAZT54 |
Sep 30 2009, 12:47 PM
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#4
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CHAZT54 Group: Members Posts: 19 Joined: 29-December 08 From: New London, Wisconsin Member No.: 9,878 Region Association: Upper MidWest |
Excellent! Thank you, I will get right to work. -Todd OK guys- DRUMSTICKS & I are back on this project. We got the hose schematic from Pelican and new hoses are routed properly. Then we gave the MPS a proper test with a gauge & pump instead of just the oral test and sure enough- doesn't hold vac. at all. So I figure, problem solved and order a rebuilt MPS from Auto-ATL and hook it up - -- little change - still runs way too rich. ---DAMN! NOW WHAT? When I hooked up the MPS I just plugged in the elect. harness and slipped on the hose w/clamp- did not bolt it down. That thing doesn't have to be bolted down to work properly does it? Where do we go from here? The snow will be flying soon and it is still in the garage. CHAZT |
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