 more help needed, changed cht, still nothing |
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| kevmac |
 Jun 6 2005, 08:30 PM
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#1
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Newbie  Group: Members Posts: 5 Joined: 30-May 05 From: franklin, ma Member No.: 4,167  |
here is my last post, its running the same after changing the cht. i also have a new fuel pressure regulator ive yet to put in. any more theories/advice is much appreciated. thanks, kev. preious post: 73 914 2.0L. runs rough at idle. runs better at high rpm. stalls after warming up. stumbles through gears at times. after key is turned to activate fuel pump, there is the sound of fuel entering system for an extended period, but no leaks. runs rich, black smoke at times what ive done: new plugs wires rotor and cap new distributer nothing so far has worked to fix this problem. any help or tips are appreciated. thanks, kev |
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| brp914 |
Jun 6 2005, 08:44 PM
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#2
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Unregistered |
rich running on a 1.7/2.0 w D-jet often means bad mps. Disconnect it's vacuum hose and suck on it. It should be able to hold vacuum.
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| ThinAir |
Jun 6 2005, 10:15 PM
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Best friends Group: Members Posts: 2,542 Joined: 4-February 03 From: Flagstaff, AZ Member No.: 231 Region Association: Southwest Region 
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If you haven't read Brad Anders' D-Jet Web Page then go there immediately and study it thoroughly before doing anything else with the engine.
You say you have a new FPR to put in - is there none installed now? Seems like I remember hearing that if you had no FPR your mixture would be very rich because the fuel pressure is very high. For D-Jet you want exactly 28 psi. I hope this helps some. |
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| mihai914 |
Jun 6 2005, 10:27 PM
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Senior Member Group: Members Posts: 800 Joined: 2-March 05 From: Montreal, QC Member No.: 3,697 Region Association: None
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No FPR would give a lean condition. The FPR is a adjustable restriction in the fuel system to obtain the required operating pressure. The fuel pump does not create pressure in the system but pushes volume, it does though have a maximum pressure specification.
(IMG:http://www.914world.com/bbs2/html/emoticons/agree.gif) read Brad's site thoroughly, MPS sounds like a good candidate but it's now a expensive part to replace so you would better be sure it's it. |
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| ThinAir |
Jun 6 2005, 10:35 PM
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#5
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Best friends Group: Members Posts: 2,542 Joined: 4-February 03 From: Flagstaff, AZ Member No.: 231 Region Association: Southwest Region
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Thanks for clarifying it. I've read Brad's stuff recently to solve my own problems, but my memory isn't so good! |
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| markb |
Jun 6 2005, 11:53 PM
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#6
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914less :( Group: Members Posts: 5,449 Joined: 22-January 03 From: Nipomo, CA Member No.: 180 Region Association: Central California
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I had something similar happen, but it was on a car with mis-matched parts. The MPS did not match the ECU. Once I got an MPS that was right, the car ran great.
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| Rhodes71/914 |
Jun 7 2005, 01:45 AM
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Glacier Group: Members Posts: 1,374 Joined: 8-August 04 From: End of the Road, Alaska Member No.: 2,482 |
Even if you have read it, read it again. I have been there so many times but I learn something new everytime. He has a section on running rich. |
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