FALSE P0102 Code. HELP!

[maroon111993]

Okay. So I was having an issue with the Mass Air Flow sensor (P0102) code popping up in the past.. replaced the MAF 3 times to no avail. Found out it was as simple as a blown fuse.

BUT NOW, the fuse is replaced, and perfectly fine. New MAF. Yet, I still get a P0102 for "Mass Air Flow Circuit Low Input." When the code is cleared and the car is running, it takes about 5 minutes for the code to come back. So I thought, hmmm.. maybe I'll leave the car running and unplug the MAF Sensor. So I did.. this time when the code is cleared, it pops back on instantly.. so this tells me that nothing is wrong with my MAF Sensor.

Driving down the road lately, I have noticed the car will act like it is misfiring, or like I just hit a brick wall... yet the RPMs are not affected at all... And it does it completely random.. And you can't make it do it on purpose.. Anyone have any idea what I should be checking next? This car is haunted! haha.

Also, sometimes when taking off, it will bog for a split second, then go. Other times, it's WOT and VROOOM.
(It used to bog when the MAF Fuse was blown) So it makes me think possibly the MAF Sensor is only working sometimes and randomly cuts out?? What should I check??

[MattStrike]

Check the wiring, and connectors. It sounds like the spring tab inside one of the connector wire pins is not making proper contact the the pin in the sensor, or a wire broke inside the insulation. You should be able to tell just by looking at the connectors spring tab, it should spring all the way to the roof of the connector:

(this is a side view, you'd be looking at it from the end).

[maroon111993]

Will try that. Thanks.

[maroon111993]

Everything was fine. Even tested with a multimeter and everything. It's all working fine. Still get the SES light and random 'jerking' though

[maroon111993]

Anyone else have any ideas?

[maroon111993]

Cleaned out MAF sensor today.. code went away for awhile. Came back after the car sat for a couple hours. It jerks and acts like it's misfiring.. but I don't get why an MAF code is popping up... anyone have any ideas?

[00Beast]

Loose wire to the PCM?

[maroon111993]

Loose wire to the PCM?

That's what I'm thinking.. Where would I look for the wire? And also what fuses all have to do with the MAF? I replaced one that was blown that was Ignition. and another was ECM Sense that was loose. An Alt Sense wasn't "blown" but did look pretty warped. Going through all of my fuses today and replacing any questionable ones. Hopefully going to follow the maf wires all the way and see where there could be a problem

[maroon111993]

Noticed a couple vacuum tubes were broke today. Replaced them and Engine light is gone (for now). But when I checked the MAF Sensor earlier today, it wasn't putting out an MAF signal, but positive and negative were OK. So we'll see how this goes. Seems to run much much better for right now anyway. No surging so far.

[maroon111993]

Also, sometimes when taking off, it will bog for a split second, then go. Other times, it's WOT and VROOOM.
(It used to bog when the MAF Fuse was blown) So it makes me think possibly the MAF Sensor is only working sometimes and randomly cuts out?? What should I check??

Just checked all my fuses.. Fuse #21 - IGN 1-UH (15A) was blown.. this is maybe the 4th time this fuse has blown and makes the car bog when using throttle. I can hear the intake.. and as soon I touch the gas it's like it stops taking in air. What could be causing this fuse to blow? It blows at random, too..

[redzmonte]

sounds like you have a damaged/grounded wire in your harness.. it can be a very big pain in the ass tracing wires, might want to have it checked out by a shop and save yourself some brain damage. Wiring is one thing i don't like to deal with.

[maroon111993]

I actually do 12v wiring for a living haha.. You think a wire to the MAF sensor? Or..?

[redzmonte]

I would suspect so if the fuse keeps blowing.. wire could be chafed or kinked hard to say where in the harness it could have failed. again its only a guess.. that is the only thing i can think of that would cause a MAF fuse to pop.

[maroon111993]

Alright I'll probably look it over when it warms up a bit. Thanks!

[maroon111993]

Welp.. went through and rewired my MAF. Still runs like crap.. tested the MAF and it's good... When it's plugged in, the engine will jerk every now and then at highway speeds. I had it unplugged for a few days and it ran fine and didn't jerk or 'miss' but did bog a bit when leaving from a stop (just like it does with it plugged in.) Plugged the MAF sensor back in today and instantly noticed the jerking in the motor.. what am I missing?

[sandrock]

Bad MAF out of the box. You did say it was "remanned" right?

That's the one thing about sensors....there is NO remanufacturing those. You can't even get to the insides without busting up the housing.

[maroon111993]

I've been through a used one, a new one, and now back to another used one is the thing.. haha. I DID just take off the Idle Air Control motor and it was caked in a bunch of black buildup crap. Cleaned it.. Goina see how it runs and check the rest of the sensors too. Also, my engine oil smells like gasoline pretty heavily..

[maroon111993]

I have the supercharged motor.. to the left of the throttle body is a thing with 3 hoses going into it, with two 10mm bolts on top. I took this off to look.. inside the SC is completely dry.. with more black built up crap. Is this how it's supposed to be? Or is there supposed to be SC oil in there?

[mylittleblackbird]

That's the vacuum T and no, there will be no oil in there. Just carbon buildup from the EGR. If you keep blowing fuses, it's as was stated: you have a grounded wire or something that's creating too much draw on that circuit. You need to trace everything that runs to that fuse and find the break, or verify that you don't have something trying to draw power from that circuit that shouldn't be. You've ruled out the MAF because the odds of having three bad MAFs is exceptionally remote. After the second fuse has blown, it's a safe bet that it's a grounding/load based issue.

Most likely the reason your car is bucking around with the MAF connected is due to the short circuit. Voltage fluctuations from your MAF will cause fueling issues with rich/lean conditions. Address the circuitry issue, and you'll solve your problems. Last I knew, the MAF ran on only 5v

FYI, the oil for the supercharger is on the snout side.

[maroon111993]

Alright. That answers that question. It runs fine without it plugged in.. But if I don't remote start it and let it run/warm up for awhile.. the second I touch the gas, it dies haha.. Sometimes bogs when leaving from a stop but not always. I'll keep checking into it. Got a bike now so not too worried about gas mileage since I rarely drive my car now. But before winter, I will use the advice everyone has given me and check all the wiring. Thanks!