Car has popped a P0101 code. Here is the problem, I've had 4 different MAF sensors on this thing since doing my 24x conversion. So wire harness is 5 months old from EFI Connections. What else can cause this code? Just looked at my harness and PCM, no pushed pins or recessed wires.
2 used MAFS and two reman MAFs, all show failure.

Also car is slow to start, takes about 5 seconds or more of cranking to fire up, can smell fuel.

 

sure its not a wiring issue somewhere in the harness?

 

Hi,
i assume you have a good tune!!!!!!checking maf voltage would be the starting point. You need to look at mods prior to issues to help pinpoint current problem. Good luck and have a blessed week.
Jim

 

Well replaced the MAP sensor. Car doesn't seem to be running as rich and the SES light has gone away. Three hour drive tomorrow for a better test.

Car fuel prime was regular today. Car still needed extended time to crank and had to crack the throttle for about five seconds, then it settled into a good steady 1k rpm idle.
So it might be running normal now but startup still isn't normal like it was two weeks ago.

I would certainly hope it isn't a wire issue, it is a new harness from EFI Connections, also no modifications have been done since the 24x conversion and the car was tuned by one of the tuners highly praised on here.

 

Yeah no good, two hours into the drive the SES light popped back on, same code. I stopped to hit the rest room, held it in 3rd gear on the onramp and the light popped back on.


Where or what should I start reading and what am I looking for? This is really strange to me, am I the only person who has trouble with their 24x conversion since day one?

Anybody have some tips here?

 

Check the maf voltage.
What does the Max delta airflow P0101 Error table look like?
Is this the only code being set?

What mods are done to it? Log the car and see what the airflow is doing when the code is set. Usually see this one trip at lower rpms where the max numbers in the above table are very low stock. Try bumping the cells around that area up a little or just take the whole table and multiply by 2 or 3 and see if it stops. Table should really be just barely above the max airflow the engine will actually see.

 

What is the most affordable way to start logging/tuning stuff? I need an OBD II cable and whatever software. (hptuners or efi live)? These are the two choices right?

 

Well I'm a bit confused. EFI Live seems way cheaper than HP Tuners? What exactly do I need to start logging and have the ability to make changes?

 

mine always throws a MAF code if i get on it really hard. no one thinks it could be in the tune??? thats what i thought mine was? were the previous codes thrown after getting on it?

 

I think Gabbiani is suggesting the error could be in the tune?

Its random, it will show up and go away whenever it pleases. Showed up two times ago when I was just holding third gear on an on-ramp, this last time it showed up after going 1-4th gear shifting around 3500-4k rpm, briskly accelerating to around 60mph.

So does anyone know what exactly I need to be able to log and make changes? Granted changes based on recommendations as I've never tuned anything myself.

 

This is what you need to scan and tune. Too bad you weren't closer we could meet up and i could get you squared away. Just need to see whats going on.

http://www.efilive.com/index.php?pag...mart&Itemid=54

 

I just went through this problem.. Tried different MAF's, nothing worked.. I, finally, pulled the intake and started looking around back there(Car ran fine prior to pulling the intake for paint, so figured I must of done something back there). I found the ground for my MAP sensor broken off right at the connecter, got a new pin, hooked it back up and no more P0101 code.. Good luck, thought I'd throw it out there for you...

 

The price, ouch! So no matter what I use there is going to be a intermediate between the laptop and the car then?

I'll take a look at my MAP sensor connector, make sure the wire hasn't recessed for the ground, then I'll read it out to ground.

The light is intermittent, for instance the car actually ran sorta fine yesterday as it decided to go out. The light will probably come on knowing my luck again today.

 

Well I tested from the MAP and MAF grounds to where my harness grounds are. They read good. .6-1 ohm. The 24x harness only had the two grounds that I had seen, I bolted both of them to the driver side head.

What should I read out next? Any other opinions on if the tune could be so far off that it will pop this code?

Gabbiani how do I go about reading the MAF voltage? Is this harness output voltage to the MAF I want to read?

Looking at the price there is no way I can log stuff at home here at the moment!

 

Bump! More opinions? Things I can check out? Would like to sort it out, going to be rebuilding the motor and I don't want this problem to still be around with the new combo or I'm going to be angry.

 

24X conversion with a 0411 PCM? What year and OS was load in it? Until you have the ability to post the tune in the PCM, no one can really help you. It's like someone trying to diadnose a P0300 misfire code after a cam install. There are not real misfires, but the way the misfire diagnostics sees the lope of the cam that sets the DTC. See if your tuner will give you the file he loaded so you can post it here. Otherwise you can change parts till the cows come home and if it is just the P0101 diagnostic paramaters in the tune you will never fix it.

 

Bumping this back up!

Why?

Because I purchased EFI Live today, have the Flashscan V2 headed my way. So now the question is, is it self explanatory, on how to record the tune or scan it?

I guess I'm wondering, what do people want to see for this and how do I get it? This way if I have the directions I can do it when it gets here. Thanks!

 

i was getting same code on my 2002 402cid and 100mm maf, checked all wirring more than once OK, even tried other maf, same thing, then i moved the maf clocking and got ride of the code, had the conector at the 3 o'clock position and put it at 11 o'clock worked perfect, cleaned up my maf reading as i watched it on my hp-tuner, i guess i was getting turbulance in my maf and at certain flow it wasen't getting read by the maf and setting of a code. then i cleaned up the reading even more by putting in a sreen. hope this could help you.

 

was reading my 97 Camaro with Lt1 PCM with my jet tuner, and it gave me the following which is related to error code P0101

anyone know how to correct this and how to get the right readings??

i got a RAMAIR air intake installed infront of a 52mm fuel injection

 

when i use the scanner, the MAF is giving readings between 9-10.5 at idle (idle at around 900rpm)