FUEL BURNING

[truth211]

Hey all. I have a Q for you guys. I have checked all the FAQ's the the threads but have come up short on an answer. I have a 1992 240sx with a KA24DE-T. Has a T-25 turbo, 370cc injectors, a redline performance ecu tune, s14 upper intake, s13 lower intake, 300zx 265lbs fuel pump, NO FPR. NO SAFC, electric fans, pretty much replaced all the sensors and set them to specs. I have a standard A/F gauge. It reads rich all the time. no matter what.

Ok here is the deal. I can barely get 100 miles out of a full tank of gas. And thats with me taking it easy and no boosting. @ Full throttle the car will boost but it will miss. It will hit about 10.5 and miss hard consistantly. The WG is turned all the way down. I am utalizing a 3" down pipe which is why it boost creeps the extra 3.5 psi. Should not be a problem though. I have replaced and set all the sensors but can not understand why in the world it eats as much gas as it does. I used to get about 400 miles out of the tank. Now I understand that a turbo will pull down mileage a little bit but it is certain that it is burning an insane amount of gas. Any idea's of what could be causing this fuel problem? Another thing is that it seems to be inconsistant too. Weather it is cold or warm it does the same thing. When I have been driving for about an hour or so it does not seem to be as bad as it was when cold. But every once in a blue moon it seems to drive like it should and when she does.....oooooooo my god does she take off lkike a bullet. If I could find out what the heck is going on would be great. Any idea's? Thanks for your time all. I look forward to hearing some idea's.

If I have a retuned ECU by redline do I need a e-manage system of a safc or something of the sorts? Also no shop out in my area will touch my car because it is so highly modified and noone knows anything about these cars so any additional info you could shoot my way would be amazingly appreciated. If I can't get this thing fixed I am just going to get rid of the car.
Modified by truth211 at 2:08 PM 10/2/2008

[truth211]

Can anyone direct me to someone that could help or a shop that I could go to that is near or in Md that would be willing to work on my car and fix it if I can't? Thank you.

[truth211]

Any one?
Modified by truth211 at 4:30 PM 10/4/2008

[moulton712]

it has to be the tune. go to a dyno or pick up an o2 wideband for starters, to see what your a/f ratio is. then you probably need a reall good tune

[truth211]

With the tune, does it have to be through the ecu or can I add on the SAFC or e-manage system? Thereason is this. If it's the tune, then what did I pay money for? If I have a stock ecu and used a SAFC would it do the same thing as the ecu tune? Or is it alittle bit of both: I have to have the ecu tuned AND an safc? Do they both have to work together or can they be used seperately? I am asking that because if it is the tune then I am going to take the company to small claims court because they charged me $350 for the tune. Redline performance on eBay were the ones who did the tune. So if it's the ecu I am going to be pissed off. But a place that does dino's will be able to tune it for me? Thanks for your help.

[CSLAVE]

Hey if your still looking for a local shop check out http://www.mamsparts.com/index.php its vaugn gittin jr's shop from formula drift so id say it reputable.

[robertftw]

when you say no fpr you mean it is stock or you don't have one on the car?

[brizanden]

Redline performance on eBay were the ones who did the tune. .

i really dont mean to be a d!ck, but why would you have an ebay comp tune ur engines brain? idk if it was me i would get in contact with jason of emance he does a really good tune from what i hear and it wont break your bank. I would say im almost 80% sure its your tune.

[truth211]

I have no idea what I was thinking. I heard he was good and the tune would be correct. He seemed to know what he was talking about when I spoke to him over the phone so I figured it would be ok. Plus his feedback was almost 100% the 2 negatives he had were from other prodocts that were not about tuning so I thought it would be ok. I do not know that much about the tuning so I am not going to act like I have any idea of it because I am clueless. Thius is my first time turbocharging a car so I am really still learning. Will a SAFC correct a bad tune job or do I need to actually get an entirely new tune and then fine tune it with the SAFC. Also do you have the number of Jason at emance? I would like to get ahold of him and see what he could do for me. Thank you.

Also I am running a stock FPR. No mods.

And Thank you for the MA Motorsports phone number. I am going to have them take a look at it. Hopefully I will know more then.

[brizanden]

I dont have jason's number just search emance with the search button and pick the thread with the most pages. i remember his number being in there. I believe a safc can adjust a ****ty tune, but its kinda the half *** way out. I would retune it and then have it tweaked at a dyno personally, but this is just what i have been reading. I havent turboed my ka yet so hopefully someone who has can jump in and provide you with some good info. Hope i helped some.

[liquid_cool]

im curious.........NO Fuel Pressure Regulator at all?...this can be hell on a fuel pump with your output..and hell on an injector..you might be holding the injectors open....all the FI systems i have ever seen use a regulator with a fuel return line man...you need to look here first....this can be a serious issue...good luck and let us know about the regulator.

[truth211]

im curious.........NO Fuel Pressure Regulator at all?...this can be hell on a fuel pump with your output..and hell on an injector..you might be holding the injectors open....all the FI systems i have ever seen use a regulator with a fuel return line man...you need to look here first....this can be a serious issue...good luck and let us know about the regulator.

I do have a fuel pressure regulator on it but it is the stock one on the stock fuel rail. I have actually been looking into getting a Billet fuel rail so I can use an AFPR but have not done so yet. However the stock FPR is vacuum based. I do not know if that has anything to do with it at all either. I am using an s14 upper intake manifold and a s13 lower. I have gotten rid of all the emissions equipment and 90% of all the vacuum lines. The only vacuum lines on the engine are the neccessary ones....BOV, Throtttle body, and FPR. So there are only 3 vacuum lines.

[truth211]

I have an appointment with MA-Motorsports tomorrow a 12pm. I will let you know what I find out. I am hoping it is something other then the tune. Hopfully it's an easy fix. Either way I will let you all know tomorrow. Thanks again for the phone number.

[CSLAVE]

Anytime man i hope they can get your problem fixed.

[truth211]

Ok. Ray at MA-Motorsports thinks it is the ECU tuning. However I am less certain of that. But what I am going to do it buy a SAFC and try o fine tune it that way and see what we can come up with. They are going to do the rest of the work. I am looking at about $700 but they are telling me I can have it working one way or another. AWESOME guys too. Very knowledgable and friendly. A++++!

[truth211]

Ok I have a SAFC II. I am going to install it as soon as I have finished the fiberglass center console. Pop question though. What are some of the sensors involved with controlling the fuel? I know 1.) Coolant temp switch2.) MAF3.) FPR

Is there anything else and any way to check these to see if they are faulty? Thanks.