[PeterDuerr]

Hey guys,

I have an issue with my mass airflow sensor. I have just received my tunercat cable and I'm reading data via $eehack (thanks for the tip @Marky Dissod)

I have also received my PCM back from a mail in tune.

My mass air flow reads 0.00g/s. I do have 12v and ground at the connector. I couldn't check the signal wire. (Its plugged in).

I have trouble codes/ CEL : "MALF 43c active" and ERR43(esc failure). I'm assuming this is the same as DTC 43 (knock sensor)?

Why am I reading nothing on the MAF but not getting DTC 48? Is this part of the tune?
The knock retard is at 0 deg. And a think im not receiving knocks.

Also oil temp is all red failled low.

Is this as simple as needing a new MAF sensor?

 

[PeterDuerr]

Oil temp pic attached

 

[PeterDuerr]

Ok, thanks. Oil temp ignored. I do have access to occiliscopes or fluke meter with frequency reading.
Wouldn't the DTC 48 chime in if it was MAF?

I had a rock auto order lined up already. A budjet MAF was $60 after shipping. I may have droped the air box with MAF if I do recall.

 

[PeterDuerr]

I sent it to a reputable tunner, they have an free 60 day adjustment policy. I will contact them after I confirm a few things. I don't want to blame them right off the hop.

I didn't have laptop capabilities untill after I received the PCM back. So I do not have original tune.. hindsight is 20/20....

 

[PeterDuerr]

I have returned parts and they pay for shipping, but it has to be with 30 days and probly a few more requirements.
I will ask for the stock tune, good idea. Thats a good start for troubleshooting.

I did have an CEL but i couldn't check. I assumed it was because of the AIRpump delete.

 

[PeterDuerr]

Agreed, I have had flat out wrong parts shipped. There is more risk with rock auto.

Do you know what kind of reading i should get? Frequency, voltage peak. If I were to receive any voltage signal, I would think that would give something better than zero on the laptop reading.

On another note, I'm definatly not understanding the mis-match if error codes. There is something I'm missing here.

 

[PeterDuerr]

Ok, i'll read up on that post. "Parts pistol" will get a few shots.
Car is new to me and I will have to learn all the in's and out's.

 

[PeterDuerr]

Ok, I was able to measure frequency and voltage off the yellow wire at the sensor.

With the meter on frequency, I had 3.3khz at idle and increases at higher RPM.

I then put the meter in min/max DC and measured 4.2vdc and it went down as increased RPM's.

FSM shows B19 on the PCM. I can't find how to determine what connector/pin that would be.

I'm thinking this sensor is fine...

 

[PeterDuerr]

Thanks,

I have confirmed continuity on the wire to the PCM. I'll contact the PCM tunner.

 

[PeterDuerr]

Ok, thanks. Thats quite a bit out side of my comfort level at this point. We'll see what the pcm tuner comes back with.

 

[PeterDuerr]

Thanks, I do have a set of FSM manuals. I could not find a similar diagram to what sherloc9c1 posted. I will print that out and keep it in the FSM.

The programmer responded, all is fine with the MAF reading, it has to do with speed density that sherloc9c1 mentioned. And also why no MAF code was coming in. So ill be returning the MAF(-$30) I ordered. Stimulating the courier industry.

I will troubleshoot the knock sensor circuit this weekend. I'm sure its a bad connection/sensor.

Usually I would prefer to work on one thing at a time, then move to the next. But the way it went with this was "its easier to do it all while its apart". So I replaced and changed many things, which makes toubleshooting more challenging.

My digital dash also started to cut out on top of it all which added to the confusion. My current speculation is that with the call for both fans to run because of the MIL code, it creats a high current draw which somehow cuts out the dash. But thats another issue thats TBD or will be a mystery forever.

 

[PeterDuerr]

No special request. He's the profesional so I'm trusting he knows his stuff. The way he has it tuned, the MAF is red and reading zero on eehack. There may be some things going on in the back end.

 

[PeterDuerr]

DTC43 knock sensor is the code.

 

[PeterDuerr]

8a-20-10 did have the connector, thanks!

I'll also confirm the temp this weekend. I seem to remember it being acurate.

I didn't see and retarded time on eehack. I updated the initial pictures to full size. You may be able to see those values now.ÿ

 

[PeterDuerr]

Thats good to know, Thanks!
I may hit you up for that in the future. Can flashhack load a tunercat.bin? Are all .bin's the same?

 

[PeterDuerr]

Ok, that makes sence. I have eehack and flashhack dowloaded. I havn't used flashhack yet.

 

[PeterDuerr]

Update...
The off brand knock sensors I installed are reading a bad resistance. Hence the knock sensor code. Should have at checked resistance before installing. ACdelco on the way. Lesson learned.

 

[PeterDuerr]

Well.... after I remove these. I will refrain from hucking them down the driveway, driving over them and setting them on fire. I'll atempt to open them up instead.

 

[PeterDuerr]

Ok so it appears to have a piezio. I think thats the white plate that gave me a static shock when I touched it.
It actually has a 100kohm resister installed.

 

[PeterDuerr]

For the record it is an Ultra Power sensor.