Adventures with no MAF signal
09-04-2005, 08:26 PM
#1
Adventures with no MAF signal
Sooooo since I have had absolutely no luck whatsoever since I installed my injectors and z32 maf, the saga continues. I had problems with the ignition for a ling time and I have been able to drive it for a total of 5 days in the past month. I really need to get a daily beater (which should be coming this next week.)
Alright. So I was coming back from work and made a tuning run to redline. All of a sudden the car starts sputtering and will not go over 1500rpms. I looked at all of my little gadgets and noticed anywhere from 0.0-6.0% Airflow (MAF) signal on my SAFC. I got off on Rt. 59, over by Mike's house, but I couldn't call him because he's at Neal's this weekend, so I pulled into an industrial park right off the highway. Since its Labor Day weekend, no one was there, which was nice.
I usually carry a "First Aid" kit with me, but since I just detailed my car, I hadn't put it back in. I played with the wires for about an hour and a half, trying to get a constant signal, but no luck. I just decided to drive the sucker home (another 10 miles) in safe mode. Since I'm running the larger injectors, my A/F was real rich and is did not go over 1400 rpms. Most of the way is construction and the 45 mph speed limit was a savior.
So when I got home, I tried to resolder the connections in the harness, but it was awkward, so I decided to make my own harness. I had some insulated quick connects left over from my zt-2 installation, so I test fitted some of those onto the z32 maf. Cool. The .110 size female fit just right, but the insulation got in the way so I cut the stuff away from the center two, mainly because the two are grounds, so it doesn't matter if they touch.
I started it up and saw the regular 1.3-1.6% and thought I was in the clear. I went into the house to grill. So I come back out to go visit with my gf and no signal.
I guess I will check the rest of the connections tomorrow. There's nothing I can do tonite.
Steve
Alright. So I was coming back from work and made a tuning run to redline. All of a sudden the car starts sputtering and will not go over 1500rpms. I looked at all of my little gadgets and noticed anywhere from 0.0-6.0% Airflow (MAF) signal on my SAFC. I got off on Rt. 59, over by Mike's house, but I couldn't call him because he's at Neal's this weekend, so I pulled into an industrial park right off the highway. Since its Labor Day weekend, no one was there, which was nice.
I usually carry a "First Aid" kit with me, but since I just detailed my car, I hadn't put it back in. I played with the wires for about an hour and a half, trying to get a constant signal, but no luck. I just decided to drive the sucker home (another 10 miles) in safe mode. Since I'm running the larger injectors, my A/F was real rich and is did not go over 1400 rpms. Most of the way is construction and the 45 mph speed limit was a savior.
So when I got home, I tried to resolder the connections in the harness, but it was awkward, so I decided to make my own harness. I had some insulated quick connects left over from my zt-2 installation, so I test fitted some of those onto the z32 maf. Cool. The .110 size female fit just right, but the insulation got in the way so I cut the stuff away from the center two, mainly because the two are grounds, so it doesn't matter if they touch.
I started it up and saw the regular 1.3-1.6% and thought I was in the clear. I went into the house to grill. So I come back out to go visit with my gf and no signal.
I guess I will check the rest of the connections tomorrow. There's nothing I can do tonite.Steve
09-04-2005, 11:03 PM
#4
Moderator who thinks he is better than us with his I30
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Join Date: May 2002
Posts: 9,335
Originally Posted by iansw
This is exactly why I gave up on the Z32 MAF and JWT ECU all together.....
Maybe the EU will be our savior.
Maybe the EU will be our savior.
09-05-2005, 09:29 AM
#7
Ian, I almost forgot, I wired mine up the same as you, with the extra A32 harness. Do you think that this is what is causing our messed up signals? I have mine taped off so no moisture would get in there.
09-05-2005, 09:39 AM
#8
Moderator who thinks he is better than us with his I30
iTrader: (8)
Join Date: May 2002
Posts: 9,335
Originally Posted by iansw
Weird - I never saw any updates on your thread.
What did you do Mike?!?!?
What did you do Mike?!?!?
09-05-2005, 04:14 PM
#12
I run at 40PSI with the Z32 Injectors (370cc), A32 MAF, and A32 Program.
With the Z32 Program - also 40 PSI.
LM-1 reads exactly 14.7:1 at idle. (With the A32 MAF/Program - haven't tested with Z32 MAF/Program)
With the Z32 Program - also 40 PSI.
LM-1 reads exactly 14.7:1 at idle. (With the A32 MAF/Program - haven't tested with Z32 MAF/Program)
09-05-2005, 04:28 PM
#13
Supporting Maxima.org Member
iTrader: (54)
Join Date: Feb 2001
Location: Northern Jersey
Posts: 10,166
Originally Posted by iansw
I run at 40PSI with the Z32 Injectors (370cc), A32 MAF, and A32 Program.
With the Z32 Program - also 40 PSI.
LM-1 reads exactly 14.7:1 at idle. (With the A32 MAF/Program - haven't tested with Z32 MAF/Program)
With the Z32 Program - also 40 PSI.
LM-1 reads exactly 14.7:1 at idle. (With the A32 MAF/Program - haven't tested with Z32 MAF/Program)
Is there any way to run the Z32 MAF with the A32 computer ?? or should I change back to the A32 MAF when takin my JWT out ??
-matt
09-05-2005, 06:01 PM
#16
Supporting Maxima.org Member
iTrader: (54)
Join Date: Feb 2001
Location: Northern Jersey
Posts: 10,166
Originally Posted by iansw
I aven't been able to get the Z32 MAF to work whatsoever - EXCEPT with the stock ECU and the charge piping not attached....
Have you ever sent your ECU to JWT for them to test and look at and make sure its programmed right ??>
I think its your ECU for some reason
-matt
09-05-2005, 06:40 PM
#17
Twice!
Both times they said the ECU was programmed correctly and it's my car.
They then said they wanted pics and it couldn't be on the non-charged side - so I gave up. Even though we all KNOW it works on the charged side.
I also sent them extensive NProbe data - they said it wasn't theri program.
Both times they said the ECU was programmed correctly and it's my car.
They then said they wanted pics and it couldn't be on the non-charged side - so I gave up. Even though we all KNOW it works on the charged side.
I also sent them extensive NProbe data - they said it wasn't theri program.
09-05-2005, 09:33 PM
#19
My AFC shows that my signal is correct with either MAF or ECU.
But when cold with the S/C piping attached - it runs like a**.
Without the piping attached, it runs fine.
I think we have 2 different problems.
But when cold with the S/C piping attached - it runs like a**.
Without the piping attached, it runs fine.
I think we have 2 different problems.
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