Single Turbo Discussion Area for discussing single turbo RX-7's.

Fuel Problems... Too Much

Thread Tools
 
Search this Thread
 
Old Nov 13, 2003 | 10:38 AM
  #1  
vspecpgt's Avatar
Thread Starter
Senior Member
 
Joined: Jan 2003
Posts: 354
From: i move around alot i'm 98 years old
Default

just have a question. i have a t04s turbo with 1300's and stock primaries... with a power FC... the problem is that i am running really really lean at idle and on boost... we added an insane amount of fuel to the t04s map and now i have it idleing ok, but it still runs real lean on boost... i could add a whole lot more fuel on boost, but i don't understand why i would have to.

orignally we thought maybe it was the map so we put in a gt79 map (big t78 map) and it was still running lean. i don't think it is the power FC because i got it brand new and was running it with my twins fine.... i do have a small exhuast leak from my crappy obx manifold but its not big enough to cause all these problems. i think i will switch to the cast hks manifold just because, but i still need to figure out why it is not running like it should be.

i took off the fuel rail to put in the new injectors and put it back on... so i don't think that my FPR would go bad all of a sudden but maybe? could my problem be a bad stock fpr/fpd? it sucks... my car is supposed to be nice and fast and i can barely accelerate out into traffic... any ideas?



heres my mods

RE monster vmount

hks twin power

taylor wires

turbonectics 60-1 .84 hotside .7 cold

obx mannifold with a small leak

power fc

1300 cc injectors

and all the other standard bolt ons....
Old Nov 13, 2003 | 10:54 AM
  #2  
1Revvin7's Avatar
Senior Member
 
Joined: Oct 2001
Posts: 10,906
From: Peoria, AZ
Default

My guess is the fpr or the fuel pump...
Old Nov 13, 2003 | 11:09 AM
  #3  
vspecpgt's Avatar
Thread Starter
Senior Member
 
Joined: Jan 2003
Posts: 354
From: i move around alot i'm 98 years old
Default

fuel pump is brand new walbro... so i don't think it is that... i would think it would either work... or not work... but it could be that....
Old Nov 13, 2003 | 02:48 PM
  #4  
1Revvin7's Avatar
Senior Member
 
Joined: Oct 2001
Posts: 10,906
From: Peoria, AZ
Default

That T78 map should be rich as hell with a to4s. Having inadequate fuel pressure would cause the symptoms you are having. Figure out your fuel pressure.
Old Nov 13, 2003 | 03:14 PM
  #5  
vspecpgt's Avatar
Thread Starter
Senior Member
 
Joined: Jan 2003
Posts: 354
From: i move around alot i'm 98 years old
Default

okay switched my fuel pump with apexkw and his nippondenso pump. the car works pretty darn good. i guess the problem was the walbro...has anyone had problems with them??? i hooked up red to blue and black to black.
Old Nov 13, 2003 | 05:23 PM
  #6  
apexkw's Avatar
Senior Member
 
Joined: Nov 2002
Posts: 1,176
From: S.w. Florida boring ass ft myers to be exact. where the old people come to die
Default

lol okay we got it fixed...now he really does have way to much fuel!! that thing is super rich!
Old Nov 13, 2003 | 06:21 PM
  #7  
1Revvin7's Avatar
Senior Member
 
Joined: Oct 2001
Posts: 10,906
From: Peoria, AZ
Default

Originally Posted by vspecpgt' date='Nov 13 2003, 04:14 PM
okay switched my fuel pump with apexkw and his nippondenso pump. the car works pretty darn good. i guess the problem was the walbro...has anyone had problems with them??? i hooked up red to blue and black to black.
Sweet..You sure it was the 255lph unit? There are plenty of ppl running that pump.
Old Nov 13, 2003 | 08:59 PM
  #8  
apexkw's Avatar
Senior Member
 
Joined: Nov 2002
Posts: 1,176
From: S.w. Florida boring ass ft myers to be exact. where the old people come to die
Default

yeah he has the bigger walbro..works pretty well now
Old Nov 14, 2003 | 07:16 AM
  #9  
1Revvin7's Avatar
Senior Member
 
Joined: Oct 2001
Posts: 10,906
From: Peoria, AZ
Default

Originally Posted by apexkw' date='Nov 13 2003, 09:59 PM
yeah he has the bigger walbro..works pretty well now
? So it wasn't working and now it is?
Old Nov 14, 2003 | 02:23 PM
  #10  
apexkw's Avatar
Senior Member
 
Joined: Nov 2002
Posts: 1,176
From: S.w. Florida boring ass ft myers to be exact. where the old people come to die
Default

exactly...it didnt work we pulled it out...stuck mine in...car ran pretty good.."super rich" pulled mine back out...looked at the two pumps..cursed a little bit...then saw the problem and fixed it! the o ring on the pump wasnt seating correctly..allowing fuel to get by the sides..so i guess the pump wasnt malfunctioning but rather install mistake..



All times are GMT -5. The time now is 01:31 PM.