trouble codes

gorgo · Post by **gorgo** » Fri Feb 29, 2008 8:07 pm

ok, i put my code reader on and i get these codes
23) throttle sensor out of range
51) ect sensor out of range indecated/curcuit open
87) fuel pump primary circuit fault

i also got 67,81,82,84, but i have no smog or egr valve, i have a egr eliminator from ford fuel injection.

are the first codes because i am using the 98 exployer sensors and if so is that a problem?

cjcnomor4 · Post by **cjcnomor4** » Fri Feb 29, 2008 8:17 pm

23- measure og/wh and bk/wh (might be br/wh and gy/rd) at the tp- should be 5v koeo. measure dg/lg and bk/wh (gy/wh and gy/rd) at idle should be .8-.9v. same wires slowly open the throttle- should go to 4.8v. your og/wh (br/wh) is power. bk/wh (gy/rd) is ground. dg/lg (gy/wh) is signal. pins 26,46,47 respectively at the pcm.

cjcnomor4 · Post by **cjcnomor4** » Fri Feb 29, 2008 8:28 pm

51- measure resistance across the ect sensor- at 50 deg f you should see 58.75k ohms at 86 deg f you should see 24.27k ohms. as temp goes up resistance goes down. check your wiring to the pcm lg/rd (lg/ye) pin 7 and bk/wh (gy/rd). check your tp wiring too i should have said before.

gorgo · Post by **gorgo** » Fri Feb 29, 2008 8:30 pm

code 51 gone after i plugged it in. DAAAAA

cjcnomor4 · Post by **cjcnomor4** » Fri Feb 29, 2008 8:36 pm

87- check lb/og from the relay to the pcm pin 22. it also has to go to the self test connector. make sure you have 12 v at the red wire at the relay. check the primary side of the relay- should be 40-85 ohms. get back with what you find and I can get you to the next steps.

gorgo · Post by **gorgo** » Mon Mar 03, 2008 12:42 am

i havent gotten to check anything yet. trying to get the other little things buttoned up. really need some exhaust. my wife is tired of my dog crawling on to her lap everytime i fire it up.

gorgo · Post by **gorgo** » Sat Mar 08, 2008 6:46 pm

ok all you smart people, is pin 46 on a a9l grounded or do i have something hooked up wrong?

cjcnomor4 · Post by **cjcnomor4** » Sat Mar 08, 2008 8:15 pm

pin 46 gy/rd ckt 359 grounds through the pcm. it is the ground circuit for most engine sensors or switches.

cgrey8 · Post by **cgrey8** » Sun Mar 09, 2008 8:30 am

The EEC has multiple ground pins because it needs ground wires landed at multiple locations around the frame and body. Since steel is such a crappy conductor of electricity (as compared to copper or aluminum), the EEC needs to know what the ground conditions are at multiple locations. I learned that the hard way when my HEGOs weren't registering the right voltage at the EEC. Since they only range from about 0-.8v, any degradation in ground affects the feedback pretty substantially. Well, I had a bad ground line and it was causing what should've been a solid .7-.8v to be something closer to .3v at the EEC. Even worse, the HEGO voltage would fluctuate depending on whether other things were turned on like the ventilation blower motor or the headlights. The result was the EEC thought the engine was running lean all the time and was constantly compensating rich...even learning that condition. As soon as I found the broken ground wire & took care of it, the HEGOs detected normally. At closed loop, the HEGO voltage bounce like they are supposed to...0-.6v. At WOT, they maintain high .7v. In lieu of this ground fault finding, I ran a dedicated ground line from the exhaust pipes to one of the EEC's ground lugs to make sure the voltage the EEC saw was solid and that got the voltage into the mid .8v range (theoretical max HEGO voltage is .9v).

gorgo · Post by **gorgo** » Mon Mar 10, 2008 8:45 am

why would i get a code 23 for the act sensor. the book says it is grounded when it puts out this code. im using the exployer act sensor, is this what is giving me the problem

cjcnomor4 · Post by **cjcnomor4** » Mon Mar 10, 2008 10:39 am

23 is a tp code. air charge wont set a 23

gorgo · Post by **gorgo** » Mon Mar 10, 2008 12:07 pm

wrong code, i do have this code though. i think it is the code 57 but its at home. so ill have to ck when i get there.