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my car is cutting out anything over a 1/4 throttle

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link16, Didn't look like he was talking back to the mods, he was apologizing for the bad grammar.

As for the mods list, look at the picture, thats your mods list. If you've read this thread you'd see that he doesn't know jack about what is in his car. He bought it the way it is. From the picture, its a stock Hahn Stage 1. So it should be a 16G Turbo, HRC Sidemount. No Portfueler. He said he just installed a Walbro 255lph Fuel Pump. From the picture it looks like it has a FMU. As far as we know, it does not have a ML or FCD.

Abe, why on earth would you bring your 2gb non Turbo/Turbo DSM to a Mechanic? What mechanic knows the real dynamics of our cars? A buddy of mine, is a mechanic at Garcia Mitsubishi, he also owns a few DSM's. Actually 7. And I know for a fact he would not know how to fix our car. I know him, and a mechanic could do the basic inspections, Fuel pressure, sensor checks, leak tests and compression checks... But that is normal N/A Stuff. How is a normal mechanic going to know about ML and FCD's, Blow By and crap like that? Only we know the real dynamics of our cars.

I belive he's in the right area for help. But, my advice is to start doing research on how to turbo a 420A First, before he can diagnose his problem. He needs to look at the write ups on 2gnt.com. Then get back to us, with a little more detailed description if I'm not correct, on what he gots going on.

We mainly need to find out if there is a FCD or ML installed.
 
One more thing about mechanics and 420A's... my friend brought her 98 to a mechanic to fix... it stopped starting, before it was hard to start, you'd have to prime it. Well she took it to a mechanic after it wouldn't start. He's charging her 1000 to replace the fuel pump and fuel filter!
 
first off I look at your pic and find your fmu is on the wrong side of the fuel rail. it needs to be on the return side not the feed side cause it holds pressure between itself and the fuel pump. second myou have been missinformed about location of map sensor. it is not on the throttle body it IS on the opposite end of your intake plenum, the round log your throttle body is mounted to. it is on the very end and the wires will be coming out the top. it is black and mounts directly into a hole in the end of the plenum. now if you get or already have a missing link you are going to remove the map sensor put the missing link in place of the original map location and then mount the map senser back ontop of the missing link. DO not boost without upgraded fuel pump and you also need to disconect stock fuel pressure regulator on the return side mounted next to gas tank and make sure that the return fuel line reaches far enough into the tank to have the end submerged in the gas in your tank. injector upgrade and a good tuner would help too. right now I am having a problem with my 420a cause I did a huge port and polish job with oversized valves and 550cc rc engineering injectors and my car is so confused it won't even let me push mboost right now. I have an SAFCII and don't know wether to go positive or negative with my corrections cause Ive never used a piggy back before. so thats all I have hope it helps.
2qik4u will c u l8tr.
 
it won't even let me push mboost right now. I have an SAFCII and don't know wether to go positive or negative with my corrections cause Ive never used a piggy back before. so thats all I have hope it helps.
Click to expand...

I know this doesn't help the OP but...The 420A cannot be tuned with SAFC. If you use the search button, Paul explains in detail as to why.
 
http://www.dsmtuners.com/forums/attachment.php?attachmentid=77166&stc=1&d=1193475798
Click to expand...
MAP Sensor!

And like I said, look for tap ins... Sure enough, Tap Ins! Sure looks like it could be a FCD. Very Crapy Install? Missing link, would be a big block under the map sensor. Which looks like ass I think...

Also looks like an FMU at the side? Which one I do not know. And you said you did replace the Fuel Pump with a Walbro 255? What about clogged Injectors? Boost Leaks? I'd first of all go through all this wiring that was duct taped together? Make sure things are properly secured, replace the duct tape with electrical tape, and wrap everything, make it look OEM... is what I would do. No need for dangling wires everywhere, just sittin around waiting to get damaged or bring damage upon something. Too easy to screw up that way. After you gone through the wires confirming everything is wired right... check for boost leaks. Then you could locate some injectors for cheap and throw them on... assuming they might be really dirty.
 
The fuel pump is not a walbro. I got some octane boost and injector cleaner to clean them out. It's now running better after that, but I still will need to get bigger injectors.

That is a blox fmu 12:1 rising rate, that i bought for it. Since the other one that was on it was bad.
 
I forgot to say. In that picture you quoted, the wires that go out of it and have two blue tipped things. Their are two wires that you can connect to it, coming out of a little black box that does not say anything on it. When i have them connected it makes my car cut out when i punch it. Another thing is when they are not connected and im giving some throttle making 3lbs of boost it will jerk the car quite a bit. Running with the wires out though, it does not cut out.
 
The black thing wired into your MAP sensor is your FCD. It is likely out of adjustment.
 
JT Power said:
I forgot to say. In that picture you quoted, the wires that go out of it and have two blue tipped things. Their are two wires that you can connect to it, coming out of a little black box that does not say anything on it. When i have them connected it makes my car cut out when i punch it. Another thing is when they are not connected and im giving some throttle making 3lbs of boost it will jerk the car quite a bit. Running with the wires out though, it does not cut out.
Click to expand...

Did you just buy the car? If so, who did you buy it from (if you don't mind saying).

Take some pictures of the black box.
 
Off topic, but Paul, I'm going to need a FCD pretty soon. Could I discuss it with you? Also I know like 2 other guys that might need one. One guy is having severe problems when he boosts his 420A and doesn't know why LOL.
 
InfiniteGSX said:
Off topic, but Paul, I'm going to need a FCD pretty soon. Could I discuss it with you? Also I know like 2 other guys that might need one. One guy is having severe problems when he boosts his 420A and doesn't know why LOL.
Click to expand...

Yeah, no problem; just PM me.
 
Alright i have a question. It may sound a little stupid, but id rather know then not. The wires from the fcd are black and red, am I supposed to plug the black wire from the fcd into the black and green wire or into the yellow and black wire?
 
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