MAF issue?

Fairlady280z

Fairlady280z

Spectator
Ok i sprayed down my z32 maf with maf cleaner today and it drove fine...later tonite on my way to a friends house my car started to lean the fawk out...like alot, i had no choice but to get to my friends house, on the way home it was rich as hell, and then the AFRs started to jump around, at idle my revs werent steady and neither was my vacuum...I pulled over and the car would idle better with the hood open too (wtf?) nothing looked wrong or out of wack, so i drove home and the afrs jumped like crazy i was seeing 12 to 15s then 17 to a sudden flash of 10 where the car would bog....so is my MAF fawked up/ bad connection or is it something else?
 
javidrifter said:
before you cleaned it was the car still warm or hot?
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hmmm, well i had driven to my friends house...maybe sat for about 30 or so minutes before i sprayed it...shit i didnt even think about whether i should have waited for the MAF coil to cool...do you think thats what i did bad? spray it while it was still warm?
 
javidrifter said:
look at it with a magnifying glass its very smiler to a light bulb filament
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Checked it out it looks fine, its in one piece the little wire so thats good? i was able to get the car running normal again, i see normal AFRs cruising (high 14s to low 15s) but now my car goes super rich in boost! UEGO wideband reads a flat 10 and the car hardly pulls...is my MAF shot?
 
yeah i really dont want to use a SAFC to make a long list short i hate wiring, it wont adjust itself for more/less boost and its like a band aid, doesnt really fix the problem....oh and money for the safc and then tuning that.

So before i get a FPR, i played around with the positioning of my MAF on the turbo intake, i moved it out further to get more air because i guessed that maybe the engine wasnt getting enough air at full boost thus riching out. Driving around all weekend it worked fine hitting mid to high 11s in boost! :D But then today i get on the highway to go to work and it goes rich again in boost...the whole weekend i was only driving around town and never went rich...how weird is that?!?
 
javidrifter said:
so the car war running fine till you sprayed the maf
Click to expand...

Well, no actually it still did the flat 10s in boost before i cleaned it, its just when i cleaned it that first time it made it go all out of wack, its back to how it was before i cleaned it now (flat 10s in boost)

Also I took off my neg batt cable to reset the ecu, it helped a bit... was seeing low 11s in boost but after 15 or so mins of driving (on the highway this morning on my way to work) it would do the flat 10 in boost again...
 
Ok got a hold of a voltmeter finally, i tested the MAF signal wire from the MAF with the ignition on car off, i got 11.8x...is that normal? I turned on the car and im getting 13.8x. The 12V wire saw .51 with ignition on, car off, 1.22-1.23 with the car running. This was with grounding the meter to my neg battery terminal, i then grounded to the one of MAF ground wire and i saw 1.16-1.17 with the car running...so i should re do my MAF wiring?

Well i went ahead and did it, i bought new 18g wire to extend it for blowthrough in the future and heat shrink everything and ran the chassis ground from the Z32 to my chassis instead of the other Z32 ground and splice to the one engine harness ground.

Basically no improvement, removing the chassis ground from where its grounded doesn't even do anything, my idle AFRs still go leaner into the 16s and 17s when i close my hood, and my cruise AFRs are still wonky and now leaner and in boost it sometimes does mid to high 11s on one pull then on another pull did flat 10 again.... the flat 10 happening when i hit full boost at 7psi....please kill me or at least help me out someone
 
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