 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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| malcolm2 |
Jun 28 2017, 02:46 PM
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#2
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Advanced Member Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States 
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 if you can find a way to check your fuel pressure, you can then bypass the CSV and check fuel pressure at high RPM and at idle. One way is like the purple line above. Or get a hose union and pull the hoses from the CSV and connect them together. make the by-pass semi-permanent (decent clamps if needed) so you can drive a while and maybe recheck your plugs. It seems that every time I have trouble, someone always asks about fuel pressure. So I bought a Harbor Freight fuel injector test kit, I guess it is. I installed the gauge between the passenger side metal fuel rail and the CSV. (green circle above) No, I can't see it when I am driving, but I can see it when I open the hood. (IMG:style_emoticons/default/shades.gif) |
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Posts in this topic
brooks944 75 still running rich Jun 26 2017, 02:19 PM
Marty Yeoman Check the pin count on the ECU. Some have six and ... Jun 26 2017, 02:25 PM
jim_hoyland
Check the pin count on the ECU. Some have six and... Jun 26 2017, 02:40 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 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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