All about the Gray Ghost

[good2win22]

Drove the ghost to work today 58 miles round trip and smoke out the tail pipe at start up when coming home. Pics below.  Throttle body was spotless before the drive as was the compressor outlet and up pipe.  Throttle body is covered in oil and the compressor outlet is still spotless.  Oil inside the inter cooler?  I've got the inter cooler out and soaking in some gas

[good2win22]

FPR arrived yesterday.  Did get it installed but ran out of time to get some testing done.  Going to play with it today and I drove it to work this morning. I can tell you this already, with pressure set at 43 line off, hot idle BLM's still at 142 and hot idle O2's are a steady 823.  I did reset the ECM. 
Knock on wood... haven't had any smoke at start up since cleaning the intercooler, up pipe and throttle body.  Let's hope it stays that way.
Was thinking of testing some theories.  Make a 3rd gear pull and log with pressure set at 43 to see what o2's show.  Then up the pressure to say 46.  Reset ECM, see what idle BLM's are doing.  Make another 3rd gear pull to confirm that she fatten's up during the pull. 
Another thought was that I have a spare MAF I could throw in. 
Something I hadn't noticed before on the PLC is that you can manipulate the voltage readings it receives from various sensors.  I know that the MAP is getting about .14 volts higher than it should as I probed the plug at the sensor  I threw a vacuum guage on one of the vacuum lines and confirmed that idle vacuum was 17/18ish and not 12.  Then adjusted the voltage so that powerlogger displays correctly.  Beats tapping into a wire and running a wire to the sensor.

[Steve Wood]

Eric's chips are often a bit on the rich side.  As far as O2's go, the chip runs open loop in idle BUT it has learning capability so it will correct itself with time meaning that the initial readings will probably change as the ecm gets some experience.

You don't have to run a wire to the sensor.  You can tap in under the dash as I show on my site.  The voltage trimming adjustments often are useful when connecting or correcting various things.  I guess you click on the auto calibrate for the map sensor.

[Scoobum]

Something's up if the BLM's are at 142 after driving around for awhile.

[good2win22]

Something's up if the BLM's are at 142 after driving around for awhile.

I agree. That's why I'm thinking something is still going on that I haven't figured out yet. MAF is one idea and I have another ECM I could throw in I could try


Steve are you saying to tune for idle O2's and let the ECM learn?   

[Steve Wood]

I am saying run the chip on the defaults and let it learn.  Give it some time and then adjust it if it still seems out of whack...as Brad suggested, it sounds like an air leak somewhere...ex haust leak could do it, or a leak on the intake side

[good2win22]

Installed the 7/8ths wheel cylinders, new long shoes on both sides and aluminum drums.

Unplugged the fan and smoke tested with sea foam.  Crawled under while father in law added the sea foam and nothing leaking on the crossover.  No smoke at the turbo flange, elbow, O2 bung, nothing on the intake or the PCV valve.  Only smoke that I could see was coming out the tail pipes.  Sprayed some soapy water at every conceivable spot that air could get into the intake side and got no sputter at all.
Replaced every rubber vacuum line and zip tied every connection.  Sprayed the soap water again and nothing.
Installed a solid pipe from the MAF to the turbo.
Same results at idle.  Normal O2 readings at idle and idle BLM is at 142.  I guess this will be my normal, all other numbers look good.

Two files below.  One driving around town for a bit and one idling in the barn

[Steve Wood]

It seems to get closer to 128 as the blm cells increment.  That often happens if there is an exhaust leak because it will suck in more air thru the leak at idle than it will as the rpm goes up.

As you can find no leak, it could be something like a fuel pressure gauge that is not as accurate as it could be, or a maf sensor that is not quite on.  I don't remember if you have a translator, or a factory maf.  Neither can I remember at the moment what a maf will normally read at 2000 rpm in park.

Basically, the ecm is still within its correctional range so its really a more theoretical problem at the moment.  Performance is not being affected.

As I am the curious sort, I would raise the idle pressure from 43 to 45 psi which is about a 2% increase in flow and see where the idle blms settle out after a few miles of driving.  I would also check to see where the cruise blms are after doing so.

Don't let those wheel cylinders kill you on damp pavement

[good2win22]

Too easy.  I'll change the pressure and see what happens.

Factory MAF still on the car

I can't for the life of me see where it's leaking at. Maybe use a different light source for looking for smoke.



I hope to not ever be on wet pavement unless I'm getting ready to do a burnout

[Scoobum]

Throttle body seals could be leaking...or the intake gasket could have 'moved' between the cylinders. Seen both...with the latter making it toss the head gaskets from leaning out at WOT. Warned the guy...but he wouldn't listen. New 02 sensor? Check the o ring seal where it screws into the bottom of the AFPR.

[good2win22]

Here's log at idle with 45 psi line off.  Anybody else have there pressure drop about 10 psi when you put the vacuum line back on?

[Steve Wood]

How many miles did drive it before taking the log?

The higher your vacuum, the more the pressure will drop when you connect the hose.  Sounds okay to me.

[Scoobum]

Mine drops to 38.

[278CIKILLER]

Like Brad said look at the O ring at the bottom of the FPR, i had the same thing on a customers car and chase it for a while.

[good2win22]

Steve, drove it to work and then reset it before the trip back home. 29.2 miles. Lots of curves and hills.  Got home and grabbed the laptop and went back out on the town to get everything warmed up.  Then I took the log at idle back at the house.


O- ring where the return line connects to the bottom of the FPR?