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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#21
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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 |
r_towle |
Sep 30 2009, 04:33 PM
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#22
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Custom Member Group: Members Posts: 24,624 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
no idea what an FPS is nor a TVS.
The MPS does not have to be bolted in. You need to chase down the vacuum leak. The fact that you replaced gaskets it good, but you may have made a mistake when you put the intake system back together... In order to rev at 4k rpms you need air. If the throttle body is closed, you are getting air from someplace and it would be a large hole... Check the intake like I said and redo it to ensure its super tight. Check the injectors are in right...another vacuum leak. Keep looking for a vacuum leak...you have one There is no doubt, there is no question, there is no other explanation for a car that can run at 4k rpm with the throttle butterlfy closed...you need air to run that fast, and alot of it. Rich |
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