Mass air running rich April 25, 2013, 11:36:25 PM I have the new engine in and running but its running way rich, here's what it is....1988 thunderbird turbo coupe1999 Explorer 5.0mass airE-303trickflow springs1.6 roller rockers65mm TBExplorer intakeF150 fuel railBBK shortiesOffroad H-pipeI'm beating my head trying to figure this thing out, I know the first thing your going to say is pull codes.... well truth is I never really figured out the method. I guess I'm looking for some ideas, but I know I need to know the codes other than system rich Quote Selected
Mass air running rich Reply #1 – April 26, 2013, 06:48:43 AM Buy a code reader. They are cheap. What is your timing at? I'm just curious. Quote Selected
Mass air running rich Reply #2 – April 26, 2013, 08:13:05 AM Timing is set where you had the white mark on the balancer, I think 10 or 12 degrees. I will look into a code reader. Quote Selected
Mass air running rich Reply #3 – April 26, 2013, 11:54:24 AM Know somebody that has a MAF you can borrow?Still on the 19#'s or did you go to 24's? Parts stores have the code readers for about 40 bucks, +/-. Quote Selected
Mass air running rich Reply #4 – April 26, 2013, 12:25:00 PM Read the Codes!!!If the o2 sensors are bad it will default to a rich condition... Quote Selected
Mass air running rich Reply #5 – April 26, 2013, 01:33:50 PM Which EEC are you using? I had to switch mine. Quote Selected
Mass air running rich Reply #6 – April 26, 2013, 01:55:56 PM O2 sensors in the wrong sides?? Quote Selected
Mass air running rich Reply #7 – April 26, 2013, 09:16:42 PM running A9P with 19#er's here are the KOEO codes31,81,82,84,85,95 Quote Selected
Mass air running rich Reply #8 – April 26, 2013, 09:17:39 PM Quote from: Dan B.;413947O2 sensors in the wrong sides?? would that make a difference? Quote Selected
Mass air running rich Reply #9 – April 27, 2013, 03:08:40 AM 81 and 82 are tad/tab sensor.84 and 85 are egr/purge canister.95 means you didn't run the fuel pump monitoring wire.31 pfe/evp sensor failed below minimum voltage.everything I see is emissions related. Quote Selected
Mass air running rich Reply #10 – April 27, 2013, 07:56:16 AM Quote from: Haystack;41397881 and 82 are tad/tab sensor.84 and 85 are egr/purge canister.95 means you didn't run the fuel pump monitoring wire.31 pfe/evp sensor failed below minimum voltage.everything I see is emissions related.Yup, nothing suggests a rich condition, so unless both o2 sensors were somehow out of calibration(about a zero chance) it ain't happnin'... Quote Selected
Mass air running rich Reply #11 – April 27, 2013, 08:34:39 AM matched wiring harness for oxygen sensors to transmission setup (manual or auto) and computer? Quote Selected
Mass air running rich Reply #12 – April 27, 2013, 08:35:36 AM maybe a sticky fuel pressure regulator? Quote Selected
Mass air running rich Reply #13 – April 27, 2013, 11:10:40 AM How do you know it's rich? Any gray smoke, exhaust burning your eyes, or fuel fouled plugs? It could just smell because of the lack of cats. An E-303 cam has some overlap which will make the exhaust smell dirty. Did you run a cylinder balance test? That test will tell you if you have a problem with an injector. Quote Selected
Mass air running rich Reply #14 – April 27, 2013, 08:05:46 PM a bad injector or o2 sensor should have thrown a code. not saying it will though.if you suspect bad o2 sensors, disconnect them and see if its still running cuddy. most of the time you don't throw codes and your running rich, its a maf/fuel pressure issue, in my experience. Quote Selected
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