 75 still running rich, 75 still running rich |
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| brooks944 |
 Jun 26 2017, 02:19 PM
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#1
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Member  Group: Members Posts: 249 Joined: 5-September 10 From: Kingston, TN Member No.: 12,139 Region Association: South East States  |
My 75 is running rich and fouling plugs after just a few miles. One of the members spent several hours helping me check and figure out the FI a couple of years ago and that made a difference (both on the car and how much I value your experts here). I have 2 extra 'brains' is it time to change that and check? One is from a '75 and one from a 74, does that matter? Both are for a 1.8 which my car is. Fuel injectors are rebuilt as well as the cold start valve. Most vacuum hoses changed. Thanks for any input.
Rick |
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| MartyYeoman |
Jun 26 2017, 02:25 PM
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#2
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Senior Member Group: Members Posts: 1,533 Joined: 19-June 03 From: San Ramon, CA Member No.: 839 Region Association: Northern California 
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Check the pin count on the ECU. Some have six and some have seven. I believe a '75 1.8 L-Jet ECU has seven.
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| jim_hoyland |
Jun 26 2017, 02:40 PM
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#3
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Get that VIN ? Group: Members Posts: 9,698 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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QUOTE(Marty Yeoman @ Jun 26 2017, 01:25 PM)  Check the pin count on the ECU. Some have six and some have seven. I believe a '75 1.8 L-Jet ECU has seven. He may be referring to the connector at the AFM; some are 6 pin, others 7. The AFM has to be compatible with the ECU. Don' have the part numbers handy, but they have been posted several times |
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Posts in this topic
brooks944 75 still running rich Jun 26 2017, 02:19 PM
brooks944 Not sure what that you mean, thanks for replying... Jun 26 2017, 02:32 PM brooks944 Probably a dumb reply, but do you have pics of wha... Jun 26 2017, 02:38 PM Marty Yeoman Sorry My Bad. I meant AFM not ECU
Check this out ... Jun 26 2017, 02:46 PM brooks944 Thanks, is the probable issue the AFM instead of t... Jun 26 2017, 05:09 PM malcolm2 So, did this just happen? Did something change, or... Jun 26 2017, 05:56 PM brooks944 The injectors were rebuilt a couple of years ago a... Jun 27 2017, 08:31 AM
malcolm2
The injectors were rebuilt a couple of years ago ... Jun 27 2017, 10:54 AM brooks944 Also, the 75 has seven pins (I also have a 74 and ... Jun 27 2017, 08:38 AM malcolm2
Also, the 75 has seven pins (I also have a 74 and... Jun 27 2017, 10:47 AM white1975 cht sensor is bad I would say if the afm is not s... Jun 27 2017, 11:02 AM brooks944 Tim did help me check out the maf, it worked fine.... Jun 27 2017, 12:20 PM malcolm2 Here is a simple test for you to try....
study up... Jun 27 2017, 12:57 PM brooks944 Here are some pictures of the spark plugs, probabl... Jun 27 2017, 02:26 PM Root_Werks As some have stated, could be CHT, my money is on ... Jun 27 2017, 03:15 PM brooks944 Thanks, what do I need for a vacuum leak. Changed... Jun 27 2017, 03:45 PM malcolm2
Thanks, what do I need for a vacuum leak. Change... Jun 27 2017, 03:55 PM timothy_nd28 Hi Rick, I've been following this thread but ... Jun 27 2017, 05:51 PM N_Jay
My 75 is running rich and fouling plugs after jus... Jun 27 2017, 06:39 PM brooks944 Clark, I got 1.376k ohms when pin 13 was connected... Jun 28 2017, 12:43 PM malcolm2
Clark, I got 1.376k ohms when pin 13 was connecte... Jun 28 2017, 02:29 PM brooks944 Tim, good luck on your test and thanks for your he... Jun 28 2017, 01:45 PM malcolm2
if you can find a way to check your fuel pressu... Jun 28 2017, 02:46 PM malcolm2 Just had a thought.... when you pull the hoses on ... Jun 28 2017, 02:59 PM 914_teener I just use the screw tee hole on the driver side f... Jun 28 2017, 07:16 PM malcolm2
I just use the screw tee hole on the driver side ... Jun 28 2017, 08:27 PM brooks944 OK, got the HF fuel injector kit and measured pin ... Jun 29 2017, 11:36 AM malcolm2
OK, got the HF fuel injector kit and measured pin... Jun 29 2017, 11:44 AM brooks944 Also, I did change the ECU yet. I have what seems... Jun 29 2017, 11:39 AM brooks944 Thanks. Did not change the ECU yet. It did run s... Jun 29 2017, 12:27 PM brooks944 Here is a couple of pictures of the plug from cyli... Jun 30 2017, 12:10 PM malcolm2 So who has more ideas about running rich? All 4 c... Jul 6 2017, 06:47 AM Bartlett 914
So who has more ideas about running rich? All 4 ... Jul 6 2017, 07:33 AM |
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