what is happening, some kinda cut Options

[dingy]

ok i have a 98 eclipse gsx slightly modded . Intake, boost controller, hard pipe,type S blow off , underive pully, k&n you know the starters i am still running 15 psi of boost. well i was leaving work when it was just starting to really get cold in dec. well I let it warm a little bit and started to take off i noticed it was running real good i went through first gear about 4 k and went to 2nd and was at about 4 k again and boosting a little over 16 psi then the car just got real quiet and fell on its face then lunged forward and then it fell again and then finally started to resume normal driving again. well i thought that at first it was because it was so cold that i was able to make more boost because the dencer air. so i turned down the boost a little back to 14 psi and i havn't had it again.

well I just got a big T 28 to replace the T25. I started to think will i have the problem more and more and what could it be. Was it spark blow out well i checked the eridum plugs gapped at .29 there ok so maybe it was fuel cut that i don't know. I have not upgraded my fuel system at all (Yet). so i asked my buddy who has the same problem all the time on his 95 talonTsi> He gets the surge at at 12 Psi and he has a upgraded fuel sys. He also has more mods than i do as well. what is this problem that i had, and my buddy is constantly getting. I am afraid i will get it more often with the bigger turbo. I need to do somthing to stop this befor it gets as bad as my buddies who cant understand it either only it doesn't do it all the time. It"s an intermitten kind of problem. All i know its can't be good on the car . Please what is this? is this common when starting to build a dsm

[black92_tsi_awd]

Does it feel like you're jitting a brick wall?? That's fuel cut. No fuel system mods are going to help you with that, the ecu will cut off the fuel once it sees too much air flowing (for the ecu). The cold dense air will make the car hit fuel cut more, that's why turning the boost down made it go away. The only way I know to truely get away from it is to get the ecu chipped.

[dingy]

yes it was like i hit a wall and then it stopped. so why would m buddies car hit that at only 12 psi . and if it is a cut made by the ecu how can i get it re chiped) and where

[The Iron Goat]

Does it feel like you're jitting a brick wall?? That's fuel cut. No fuel system mods are going to help you with that, the ecu will cut off the fuel once it sees too much air flowing (for the ecu).

I was under the impression that fuel cut can compeltely be managed by MAFT, SAFC or similar setups. I had a problem with fuel cut, and was able to tune it out with a MAFT. It does sound like fuel cut you're getting.

[turbohcar]

Upgrade your fuel system, get a datalogger, and get a chipped Eprom ECU that's chipped to eliminate fuel cut.

[black92_tsi_awd]

Does it feel like you're jitting a brick wall??  That's fuel cut.  No fuel system mods are going to help you with that, the ecu will cut off the fuel once it sees too much air flowing (for the ecu).

I was under the impression that fuel cut can compeltely be managed by MAFT, SAFC or similar setups. I had a problem with fuel cut, and was able to tune it out with a MAFT. It does sound like fuel cut you're getting.

From what I get from researching my fuel cut issues is that you can delay fuel cut by using a MAFT, SAFC etc. You can delay it because the MAFT, SAFC works by altering the airflow readings in order to adjust the fuel requirements. So you're not truely getting rid of it, only the chip will do that.

[turbohcar]

Does it feel like you're jitting a brick wall??  That's fuel cut.  No fuel system mods are going to help you with that, the ecu will cut off the fuel once it sees too much air flowing (for the ecu).

I was under the impression that fuel cut can compeltely be managed by MAFT, SAFC or similar setups. I had a problem with fuel cut, and was able to tune it out with a MAFT. It does sound like fuel cut you're getting.

From what I get from researching my fuel cut issues is that you can delay fuel cut by using a MAFT, SAFC etc. You can delay it because the MAFT, SAFC works by altering the airflow readings in order to adjust the fuel requirements. So you're not truely getting rid of it, only the chip will do that.

Exactly.

[dingy]

ok one question where can i get the chip and installed so i don't get fuel cut ??

[black92_tsi_awd]

I think Wort?? still does it on this board.

First you need to see if you have a EPROM ecu, see TMO site
It looks like TMO no longer sells chip though.

If you have a EPROM ecu, you'll then have to have it socketed.

Keydiver is another source: http://www.dsmchips.com/

[turbohcar]

You have to have/get an Eprom ECU in order to be able to do that. If you have an Eprom ECU, you have to get it socketed and get a chip burned. One of our members, Wortdog, can do that for you.

[black92_tsi_awd]

Apparently Turbo and I are typing and thinking alike at the same time!

[Hult250R]

If youve got a 1998 you ll have to get an EPROM ECU out of a 1995 car, the 95's are the only 2G's with EPROMs and have a chip burned for it.

[treydawgs4g63T]

were can you get 2g ecus chipped at. I checked the above link and it was for 1g only.

[treydawgs4g63T]

I found it never mind. THanks for letting us know the site though cause I have been wanting to do this.

[Chicago_DSM]

Even tho a chipped Eprom is a great remedy for an annoying fuel cut issue, it's completely un-necesary for a lightly modded car...I mean cmon!

I wouldn't start buying a whole new $300 ecu just to run for a couple more months in the cold with out hitting fuel cut, just keep the boost lower and your foot off the gas more often....

Once the weather is a little bit nicer, but not too hot, you will be able to bump the boost back up with almost no worries of fuel cut, until you start hitting the REAl magic number that the ecu will start cutting fuel, which is probably in the 18-20psi range on that 2g mas you have...Anyway, by the time you are running that high of boost you will most likely ( I hope) have fuel mods and a tuning device to help the ecu see less air from the MAS (SAFC) so fuel cut should be delayed once again...

So I wouldn't doubt you seeing fuel cut

[The Iron Goat]

It's TOTALLY reasonable for ANY level car. The ability to completely reflash for varying conditions is absolutely great. It has no bearing on how modded your car is.

[dingy]

thanks i agree i would hate to have to hold back against a honduhhh in the winter just because i might hit fuel cut. that looks real bad not just for me but for all dsm'ers if he thinks he can keep up with my slightly modded dsm he might as well think he is fast and we all know better than that. i may have just a few mods now but there are more on the way so i will need one or a piggyback i don't know what is the advantages of the piggyback are but for about 100$ more i can get one from greddy 370$ in all. ?? what are the advantages of a piggy over the chip mod anyone

[turbohcar]

Well, it's $370 for the Greddy you say, and about $300 for a used Eprom ECU, chipped, and socketed. With the piggyback unit you're merely overriding the stock computer and fooling it into providing more fuel (or less) than normal for a set condition. The Eprom ECU operates off of a fuel map and with a reflash, can be reprogrammed to accept several different parameters to alter that fuel map, I.E. different injectors etc. Basically it's a band-aid versus actually fixing the problem altogether.

[dingy]

hmm well thats some real food for thought I guess I would rather fix a problem than mask it with another one. i am watching a eprom on ebay right now for 80$ i will know in about 6 days if i get it. after that i will send it off for the stage 2 set up. then i should be set up to finish doing some of my mods i have been waiting for spring to start on. i am just to lazy in the winter to really do anything . so i'll just keep buying the mods i need and go to work on them when its warm.