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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech

running problems

  • Thread starter Thread starter airborne_ranger
  • Start date Start date Feb 12, 2006
A

airborne_ranger

New Member
Feb 12, 2006
1
0
0
Feb 12, 2006
#1
  • Feb 12, 2006
  • #1
im new to this site so hopfully this isnt to fked up i have a 95 5.0 with 3.55s,k&n,ported mass air,mac long tube,mac pro chamber dumped. i ran over some thing and jacked up my exhaust so thats when i put my long tubes and pro chamber on and it runs like **** when its cold it will run good but after i get down the block it just cuts out and studers on exceleration expecialy at full throttle, ive put new plugs,wires,cap,rotor,coil,fuel pump,o2 sensors . it has good spark and good fuel pressure up to red line , every so often it will set a check engin light but it has a reading error. im getting extremly frusterated thank alot.
 

blksn955.o

Founding Member
Mar 15, 2002
3,263
0
66
st.louis mo 314
Feb 12, 2006
#2
  • Feb 12, 2006
  • #2
ported maf, not to be an arse, is a horrible mod.

I would try swapping out MAFs with a stock one. Also longtubes move the o2 sensor further down and they run into some heat-up issues as the eec has a temp setting for the o2's. Think of putting your hand 2in away from a hairdryr' then moving it 6in away. Cold startup issues and some other things are common with longtubes, a tune is a good thing to get at this point.
 

VibrantRedGT

"STANGNET'S PENGUIN SMACKER"
15 Year Member
Nov 29, 1999
14,679
424
154
Boca Raton, Florida
Feb 12, 2006
#3
  • Feb 12, 2006
  • #3
Actually the ported MAF can be an issue. The codes will tell you an area that is wrong. Go to Auto Zone and have them test for free.
 

Black95GTS

Active Member
Jan 8, 2004
1,644
3
38
Marlborough, MA
Feb 12, 2006
#4
  • Feb 12, 2006
  • #4
By porting your MAF you are going to run lean. This is because the computer thinks there is LESS air then is actually being used. So you port the MAF, get more airflow, but the fuel stays the same. Ping city.

Did you get the extension plugs for the longtube 02 sensors? How does your car run when its at wide open throttle? (WOT) At WOT, your computer no longer uses your oxygen sensors. See if the car still bucks when you mat the pedal. That will eliminate the 02s and the MAF will be calculating a/f.

I would definately pull codes like vib mentioned.

Adam
 
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