MAF Problem? 2k Rev limit REAL rich

[91s13ca18]

Hi there let me just say that I am new to these cars. I just bought a 91 s13 off my buddy that he had done a ca18det swap in. He was never able to get the car running right but I have run into a lot of half a**ed things that I have already fixed.

The problem is, the car will start up perfectly one turn of the key, sometimes it will idle smoothly other times rough. If you give the car throttle it will rev to about 2k then just loose power and backfire. I can smell fuel and the car is blowing black smoke so I KNOW its rich. lol. I am going to go pull the codes off the ECU here in a minute but I figured that maybe someone had run into this problem before...

I checked-Boost leaks GroundsSpark plugs gapped at .070

The car came with 3 MAF's don't know what any of them go to but I have tryed the first two and both seem to run about the same-

58a10 afh45-40 4 prong metal tryed54c01 afh50-14a 3 prong metal tryed70f00 a36-610 4 prong black plastic didn't try

Also I took a video of the car running that I can post up if anyone doesn't understand what I am talking about... Let me know I'll throw it on if it would be helpful!THANKS GUYS!!!!

[Ca_Silvia]

i'm going with MAF being the problem. Any ECU codes should help narrow it down. If no codes are present, probably MAF.

I have CA silvia that came with the motor out of the factory i can check the model # on the MAF when i get home to help you narrow it down.

[91s13ca18]

i'm going with MAF being the problem. Any ECU codes should help narrow it down. If no codes are present, probably MAF.

I have CA silvia that came with the motor out of the factory i can check the model # on the MAF when i get home to help you narrow it down.

Thanks man that would help a lot! Yeah I just ran the diagnostic mode and it didn't throw anything accept for in mode 5 and it blinked twice green which if i understand correctly that means its a MAF code. lol As you can tell I'm new to these.

On a side note it seems like when the car gets warmer it is running richer... After it gets up to temp it misfires more and seems to blow more black smoke. Tryin to give as much info as I can but it doesn't seem like i have a lot to run on...

[frftw]

just look up a pic of the ca maf on google to see wich one to use, thats what i did. also spark plugs should be .044

[91s13ca18]

just look up a pic of the ca maf on google to see wich one to use, thats what i did. also spark plugs should be .044

Haha thanks for the input man. Yeah I ordered a ka24e MAF today at advance auto... sooo I guess we will see what happens tommarow.

I do not have a 3 prong wireing harness so does anyone know what wire goes to what prong? I know from looking at other posts that the green and yellow wire is suposedly not used for the 3 prong setup, I just don't know the order for the other 3 on the MAF. Anyone know the correct order? Thanks guys!!!

[91s13ca18]

http://www.youtube.com/watch?v=fW8LXpoUfH4

I uploaded my camera today so I figured I would throw on the video I was talking about... I heard someone saying something about the ECU being in a safe mode?? I have never heard of this before, has anyone else??

[ca18detgabby]

your car is in limp mode(safe mode). your maf wiring is likely to blame.......

the wiring for the KAE maf is in the FAQs

[91s13ca18]

your car is in limp mode(safe mode). your maf wiring is likely to blame.......

the wiring for the KAE maf is in the FAQs

Hey dude, yeah I found the ca to ka wireing. But what i need is i need the order the ca wires would go on the ka maf. Because for now I do not have a plug from my car so i have these little clip things to clip to the prongs on the maf. lol. I know its getto, but its just temporary till i figure out what the under lining problem is.....

Anyone know the correct order of the ca wires on the ka maf?

[91s13ca18]

So I picked up the KA24E MAF and put it in this morning I made my own wireing harness and I followed the instructions for the wiring of it. But I'm still not sure if I have the wires going into the MAF the right way...

A- black/whiteB- blackC- White

But anyway the car starts up but runs pretty rough. The engine revs up now but at idle it seems to be blowing white smoke. It almost seems to be running lean now... But yeah if anyone knows if I have the wireing correct please let me know! I'm not tryin to blow out the new MAF I just bought or fry my engine! lol PLEASE I know someone is running a KA24E MAF on their CA so PLEASEEEE let me know if I have the wires correct! Thanks guys!!! I owe you guys!!!

[ca18detgabby]

KA harness

Black = groundBlack/white = 12voltswhite = signal 0-5volts

use a multi-meter to make u are using the correct connections. IIRC the maf has them marked as well.

smoke is likely unburnt fuel from running the thing w/o a proper maf and thus your plugs are still covered in fuel..... and not burning properly. get them swapped w/ some very basic copper plugs. see what happens.......

[91s13ca18]

KA harness

Black = groundBlack/white = 12voltswhite = signal 0-5volts

use a multi-meter to make u are using the correct connections. IIRC the maf has them marked as well.

smoke is likely unburnt fuel from running the thing w/o a proper maf and thus your plugs are still covered in fuel..... and not burning properly. get them swapped w/ some very basic copper plugs. see what happens.......

Thanks man! Yeah I just found out from the previous owner that he acidentally put chain saw gas in it when he was trying to diagnose the problems.. lol so that would explane the white smoke.

I took the car out for a quick spin and it seems to to have a slight hesitation around 2000 rpms then it's fine... I was talking to some other people in a differant forum and they were saying that my ignition timing is probably off by a little... Does this sound like a possibly solution to this problem? I can check the timing on saturday...

[shally2186]

Id say DEF check ur timing EVEN if its not the prob... Timing is EVERYTHING...

[zenki-S13]

did you ever find if the maf was the problem?my car is doing the same thing.

[float_6969]

No air filter can cause problems too.

[Kaforlife]

Yeah my car was doing the same thing. Its fixed now turned out to be the tune was wrong.

[thatjdmchic]

-def check your timing most the time people never check their timing belts so far that i've seen on the ca18det.. idk y but they just dont look at it. 88 nissan pulsar's timing belt works for it if urs looks fugly. -mine looked great till i took it out to road test it and it was dry rotting ....if you read my maf thread as well might help you out i was having the same problem i used sr20 maf / apexi neo to fix the rich and lean problems...

Id say DEF check ur timing EVEN if its not the prob... Timing is EVERYTHING...

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