hot exhaust

**mdj** · 10-12-2013

came up the mtn.tonight and the jeep exhaust was red all the way past muffler and cutting out bad.was logging at time and everthing looked fine.CEL was randomly flashing.will look into tomorrow but the log not showing any problems and the CEL randomly flashing has me confused.Any thaughts on were to start on the ecm end of things.

**EagleMark** · 10-12-2013

Ouch! That's hot. Maybe it was loosing fuel pressure = LEAN!

**mdj** · 10-12-2013

blm was close to 128 thru out driving range.

**EagleMark** · 10-12-2013

That's where it would be no matter in OL and the code set was probably O2 sensor Lean which would make it go OL.

**mdj** · 10-12-2013

Disconnected data cable and had rapid CEL flash,reconnected data cable and got a 12 and 51 code.51 was prom error.Changed out chip and same thing,checked both chips on flash and burn and they both checked out good does this sound like a bad ecm. (7747)ecm and 512 chip.

**mdj** · 10-12-2013

Stayed in closed loop the complete log.

**S10LS** · 10-13-2013

What was ign timing? bad cat?

**mdj** · 10-13-2013

No cat , timing is on, looks like a bad ecm.Any way to install a 512 chip in a 7747 without the 30.00 $ moates adaptor?

**EagleMark** · 10-13-2013

Like this!

http://www.gearhead-efi.com/Fuel-Inj...sion-(27SF512)

**mdj** · 10-13-2013

Well I took the moates adaptor that has the controle to run different bins on a single 512 chip out of old ecm and installed it in a new ecm and I am getting same problem.Chip passes verification on programmer .Does this sound like possibly bad adaptor?

**Fast355** · 10-13-2013

Originally Posted by mdj

Well I took the moates adaptor that has the controle to run different bins on a single 512 chip out of old ecm and installed it in a new ecm and I am getting same problem.Chip passes verification on programmer .Does this sound like possibly bad adaptor?

More than likely the wrong offsets, a corrupted .bin or a bad prom.

**mdj** · 10-13-2013

I have tried two chips that were both verified with buffer,I have tried different known good bins still get code 51(prom error)

**EagleMark** · 10-13-2013

Could be they are not stacked correctly?

http://support.moates.net/g3gp3-configuration-and-use/

**ony** · 10-13-2013

did you disconnect the battery to clear the codes before in stalling another chip?

**mdj** · 10-14-2013

Im not stacking bins and yes I Ihave been erasing codes.I made up a new adaptor from a zif connecter and shorted out the 5 pins(hopefully the correct 5)tried it again and still rapid flash CEL and 51 code.Can a chip be bad even when it checks out good with the programmer(verify chip with buffer)I only have the two chips, is moates best place to order more 512 proms.This setup has worked fine for months until the other night.