If it runs fine without the MAF than is is the MAF. I promise. You know the label on the MAF. It should say 3 numbers on it. like 440 or something. I dont remember the numbers they come with. But replace the MAF with one that says the same numbers and the car will run fine. I had one go out on me and my dattalogger showed that the engine was still getting close readinds of the air flow. But it doesnt have to off by much to run like, that.
you have a bad maf sensor and your ecu is getting messed up readings from it but there easy to replace ... in a dsm ive never worked on vr4 but you with out a doubt have a bad maf
Your MAF sensor is bad. This is one of the most basic things you can do to figure this out. You unplug it, it runs fine. Plug it back in, runs like shit. Get a new one.
Make sure you have your engine grounded well! I have one from my plenum, throttle body, and then the transmission. I had very similar problems to this that I could not figure out and that did the trick.
Ur ecs (suspension) computer bad? (both flash on off on dash). If so the caps in the ecs controller are prone to the same thing as ecu with leaking. No big deal right? Whats the suspension have to do with that? ....ecs computer is on same circuit as the tps in the ecu, so with a malfunctioning ecs, u get bad tps signal. Also had a bad maf at the same time....tapping on the top of the maf at all would cause a miss, repeating it quickly would kill it all together. Check ecs controller....
check your ecu caps as well. don't know if you already have rebuilt your ecu but i noticed you have a 1st gen. i had a similar problem where the car would start and die immediately with the MAF plugged in but started right up with it unplugged. i thought it was the MAF and bought a refurb one from advance auto just to find out my ECU caps had leaked. hope that helps. i'm on 3si as the same user name. good luck!
you figure it out man? sounds like the maf definitly. Was that the one I sold you? I know mine was in perfect known running condition before i went blow thru. Any conclusions yet?
You have to replace it with a 3/S turbo maf. Is that a can of maf cleaner in the background? If so, that's your problem right there. That stuff kills Mitsubishi maf's. I didn't know any better and killed mine once.
@tzz50 not just any maf will do it must be a maf from a turbo,and if you get a brand new one from mitsu be ready to pay$ 600.62 My dodge stealth did the same after my rebuild on my maiden voyage home unplugged and ran on cpu for a week got a new used maf and its back to its beastly self again,$59,from Ebay,Hope youve got it already also eclipse turbo 92-95 i think has the same maf the only challenge can be wires and the match up.Nice build good luck.
sounds like airflow sensor broken, you could check with diagnostic connected(i use palm with mitsu software), with disconected airflow sensor engine computer goes to preprogrammed air flow map.
If it runs fine without the MAF than is is the MAF. I promise. You know the label on the MAF. It should say 3 numbers on it. like 440 or something. I dont remember the numbers they come with. But replace the MAF with one that says the same numbers and the car will run fine. I had one go out on me and my dattalogger showed that the engine was still getting close readinds of the air flow. But it doesnt have to off by much to run like, that.
cory3101 2 days ago
my car is the same way cant figure out whats wrong going to try the maf sensor unplug
oxnard420 2 weeks ago
Sigh... Mitsubishi's
sp6yd6er6 3 weeks ago
you have a bad maf sensor and your ecu is getting messed up readings from it but there easy to replace ... in a dsm ive never worked on vr4 but you with out a doubt have a bad maf
tyjtag747 1 month ago
Your MAF sensor is bad. This is one of the most basic things you can do to figure this out. You unplug it, it runs fine. Plug it back in, runs like shit. Get a new one.
mlopinto2k1 1 month ago
Make sure you have your engine grounded well! I have one from my plenum, throttle body, and then the transmission. I had very similar problems to this that I could not figure out and that did the trick.
bborton1 1 month ago
Defo check the maf, 02 sensor, throttle cable, ECU for leaky caps, and check the cambelt good be off a few teeth cheers
0devilzfury0 1 month ago
I have a 91 n/a rt, but I think a newer vr4 still has ecs....
subydudepornstar 4 months ago
Ur ecs (suspension) computer bad? (both flash on off on dash). If so the caps in the ecs controller are prone to the same thing as ecu with leaking. No big deal right? Whats the suspension have to do with that? ....ecs computer is on same circuit as the tps in the ecu, so with a malfunctioning ecs, u get bad tps signal. Also had a bad maf at the same time....tapping on the top of the maf at all would cause a miss, repeating it quickly would kill it all together. Check ecs controller....
subydudepornstar 4 months ago
Hello man , Check with mmcd the DTc . Sound like MAF or Bad O2 , have u got CeL?
saf68fr 5 months ago
your throttle is off i had same problem with mine i had replace it sound 100% same as mine
automechanic01 6 months ago
check your ecu caps as well. don't know if you already have rebuilt your ecu but i noticed you have a 1st gen. i had a similar problem where the car would start and die immediately with the MAF plugged in but started right up with it unplugged. i thought it was the MAF and bought a refurb one from advance auto just to find out my ECU caps had leaked. hope that helps. i'm on 3si as the same user name. good luck!
iamdk72986 6 months ago
you figure it out man? sounds like the maf definitly. Was that the one I sold you? I know mine was in perfect known running condition before i went blow thru. Any conclusions yet?
Mikesvr4 6 months ago
You have to replace it with a 3/S turbo maf. Is that a can of maf cleaner in the background? If so, that's your problem right there. That stuff kills Mitsubishi maf's. I didn't know any better and killed mine once.
SuperFast3OOOGT 7 months ago
ok can a maf from any 300gt or do it have 2 be from a vr4
tzz50 7 months ago
@tzz50 not just any maf will do it must be a maf from a turbo,and if you get a brand new one from mitsu be ready to pay$ 600.62 My dodge stealth did the same after my rebuild on my maiden voyage home unplugged and ran on cpu for a week got a new used maf and its back to its beastly self again,$59,from Ebay,Hope youve got it already also eclipse turbo 92-95 i think has the same maf the only challenge can be wires and the match up.Nice build good luck.
sledgenwedge 4 months ago
That totally sounds like a MAF gone bad. Swap one out from another mitsu and see what happens.
chevyhs 7 months ago
sounds like airflow sensor broken, you could check with diagnostic connected(i use palm with mitsu software), with disconected airflow sensor engine computer goes to preprogrammed air flow map.
bikes4parts 7 months ago