jason's education thread

[Charlief1]

I'd like to go with the bigger 30 spline axle but eaton is proud of their posi unit.  Gotta save some dough before going that route. What do you have in mind for a trade Charlie? 

I've got the empty housing with gears and posi along with a full installation kit so you'd have all the parts you'd need and only need to buy the posi. You can find them on evilbay at a decent price. The other potion is to go with the 9" unit I've got. It's got 350 gears but a mini spool in it. The ears on the top of the housing were welded in wrong and it will need axles and brakes purchased.

[good2win22]

Coil pack checked good.  Voltage at Ecm A6 is exactly like the fuel pump, .4 volt less than at the back of the alternator and it doesn't fluctuate as scan master would lead you to believe. No change at alternator with lights on.


Need to run volt meter to fuel pump and make a pull to see what volts are.  If that checks good, I'm done with worrying about voltage

[Steve Wood]

that would be my stance as well....the only thing might be to modify your spare ecm...which should be ready anyway....and see how, if at all, the out put is  changed on the scantool.

Okay, maybe not the only now that I am interested again....tap the meter into the injector feed and see it it stays steady..

4 tenths might be in the switch or the fuse terminals...I would "guess" that two tenths might be about as good as you could hope for but four tenths is not hurting anything with a good output from the alternator to begin with.

Underload, the quality of the connections becomes more apparent as the low current connections get a little more juice on them so maybe leave the meter on the ecm..take a reading under wot there and then off the alternator under the same conditions?

[good2win22]

that would be my stance as well....the only thing might be to modify your spare ecm...which should be ready anyway....and see how, if at all, the out put is  changed on the scantool.

Okay, maybe not the only now that I am interested again....tap the meter into the injector feed and see it it stays steady..

4 tenths might be in the switch or the fuse terminals...I would "guess" that two tenths might be about as good as you could hope for but four tenths is not hurting anything with a good output from the alternator to begin with.

Underload, the quality of the connections becomes more apparent as the low current connections get a little more juice on them so maybe leave the meter on the ecm..take a reading under wot there and then off the alternator under the same conditions?

Am I not seeing it on the schematic?  I see A1 for the relay, then I see six separate wires for each injector. Or should I be looking at D on the fuel pump relay itself.  That looks like it comes from the fuse block

[Steve Wood]

Injectors are always hot. Ecm grounds them. Hot wire to them comes from the fuse which also feeds the pump relay

[good2win22]

Checked voltage at the fuse block for injectors.  .2 volt drop compared to the back of alternator.  Checked voltage at fuel pump relay, .3 volt drop. 


Still need to mod the spare ecm, swap the powerlogger and chip then check voltage readings.

[Steve Wood]

so far it sounds okay to me...checking it under a load will show up any high resistance circuits that might look okay when not much current is being pulled...

[Steve Wood]

when you pull the ecm connectors, you might spray both the female and male connectors with some contact cleaner like DeoxIt D5 or similar

[good2win22]

when you pull the ecm connectors, you might spray both the female and male connectors with some contact cleaner like DeoxIt D5 or similar

will do

[good2win22]

Swapped ECM's yesterday afternoon.  Voltage on SM still bouncing around from 14.2ish - 13.8ish, sometimes lower than that.  Haven't completed a WOT pull to see if there is any change.  Drove the car to work Tuesday and Wednesday since weather has been nice.  BLM at idle was at 132 before the ECM swap.

Took a look back at the alky instructions and noticed that the control knob was set at 7 not at 6 as the instructions stated.  Turned the knob back to just above 6, man you would think someone put some locktite on that knob. 

Happy turkey day to all, I'll be eating ham!

[Charlief1]

I'll call later Jason. Watch TB.com lounge for a new member to join and say hi. It's gonna be an interesting Christmas and I'm not going to say anything else for now.

[Steve Wood]

If you compare voltages between a meter and a scan tool,  you will see the meter reads pretty steady while the scan tool shows a lot of variation. That's one of the reasons I take some of it with a grain of salt

[good2win22]

If you compare voltages between a meter and a scan tool,  you will see the meter reads pretty steady while the scan tool shows a lot of variation. That's one of the reasons I take some of it with a grain of salt

I'm almost at that point. Are you running a volt booster?

[Steve Wood]

Nope... Screws up the alky curve. Only helps if the fuel pump is marginal

[good2win22]

I'll call later Jason. Watch TB.com lounge for a new member to join and say hi. It's gonna be an interesting Christmas and I'm not going to say anything else for now.

What you talkin 'bout Willis?