5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

HELP! CAR WENT INTO LIMP MODE AND RNS LIKE CRAP! NEED HELP ASAP

Thread Tools
 
Search this Thread
 
Old 04-02-2006, 09:59 PM
  #1  
black89gt
4th Gear Member
Thread Starter
 
black89gt's Avatar
 
Join Date: Mar 2005
Location:
Posts: 1,198
Default HELP! CAR WENT INTO LIMP MODE AND RNS LIKE CRAP! NEED HELP ASAP

ok guys i pumped techron premium in my car today for the first time since katrina(yes i live in new orleans). and i was on the interstate and my check engine light pops up. i try and see if something is wrong(becasue i ahd this problem before i.e. having no power when flooring it before) so i floored it and they had absolutely no power, it took like 6 seconds to get to 60-80.. and i felt NO power at all... ok i was at home and my dad had his snap-on scanner so i scanned the car. it came out

Codes: 98 DTC Present (FMEM)/EPC CKT FAULT
66 Air Flow( MAF/VAF) Signal Low Ckt GND

i know that code 66 means that my MAF is most likely bad, and code 98 i read in the troubleshooter book that the car has went into a Limp mode.

If someone can please help me ASAP i would greatly appreiciate it because i have no car to drive to school if this thing keeps running like ****! TANKS in advanced
black89gt is offline  
Old 04-02-2006, 10:17 PM
  #2  
Crazyfast50stang
5th Gear Member
 
Crazyfast50stang's Avatar
 
Join Date: May 2004
Location: Redondo Beach, CA
Posts: 2,128
Default RE: HELP! CAR WENT INTO LIMP MODE AND RNS LIKE CRAP! NEED HELP ASAP

Ok to check the MAF you can tap it lightly with a screw driver while it is on. If the RPM's go crazy then its time for a new MAF. I dont think that the gas would do anything to your car cause premium gas from chevron is one of the best. Maybe it is time to do a tune up. Check your fuel filter and fuel pressure. Go from there. Good luck.
Crazyfast50stang is offline  
Old 04-03-2006, 12:18 AM
  #3  
black89gt
4th Gear Member
Thread Starter
 
black89gt's Avatar
 
Join Date: Mar 2005
Location:
Posts: 1,198
Default RE: HELP! CAR WENT INTO LIMP MODE AND RNS LIKE CRAP! NEED HELP ASAP

i just did a full tune up. i just got the car out of hte shop like 2 weeks ago. had the change hte whole dizzy becasue it couldnt idle for ****.. i mean the the wasnt even driveable. wlel ill try that tomorrow after i get off from school. wish me luck. any other advice would be appreciativve.
black89gt is offline  
Old 04-03-2006, 12:21 AM
  #4  
black89gt
4th Gear Member
Thread Starter
 
black89gt's Avatar
 
Join Date: Mar 2005
Location:
Posts: 1,198
Default RE: HELP! CAR WENT INTO LIMP MODE AND RNS LIKE CRAP! NEED HELP ASAP

one more question.. what would cause hte car to go into the FMEM mode?
black89gt is offline  
Old 04-03-2006, 01:02 AM
  #5  
Tims 88GT
6th Gear Member
 
Tims 88GT's Avatar
 
Join Date: Jan 2005
Location:
Posts: 7,657
Default RE: HELP! CAR WENT INTO LIMP MODE AND RNS LIKE CRAP! NEED HELP ASAP

did u reset the computer?
Tims 88GT is offline  
Old 04-03-2006, 01:07 AM
  #6  
AdderMk2
Banned
 
AdderMk2's Avatar
 
Join Date: Dec 2005
Location: Lil' Rhody
Posts: 22,376
Default RE: HELP! CAR WENT INTO LIMP MODE AND RNS LIKE CRAP! NEED HELP ASAP

Heres a question for you....

You get a CEL code saying you have a bad MAF..... and your still asking US whats wrong with it.... common sence dude.... make the codes go away THEN ask for help. We arent going to buy the parts FOR you
AdderMk2 is offline  
Old 04-03-2006, 01:10 AM
  #7  
black89gt
4th Gear Member
Thread Starter
 
black89gt's Avatar
 
Join Date: Mar 2005
Location:
Posts: 1,198
Default RE: HELP! CAR WENT INTO LIMP MODE AND RNS LIKE CRAP! NEED HELP ASAP

whoa geeze not to be negative but im just trying to figure out whats wrong.. damn man chill out. i knew the MAF was bad but i didnt understand the code 98.. the FMEM aka "limp mode"
black89gt is offline  
Old 04-03-2006, 01:13 AM
  #8  
Tims 88GT
6th Gear Member
 
Tims 88GT's Avatar
 
Join Date: Jan 2005
Location:
Posts: 7,657
Default RE: HELP! CAR WENT INTO LIMP MODE AND RNS LIKE CRAP! NEED HELP ASAP

ahh its kool i dont get that code ither, like i said reset the computer.
Tims 88GT is offline  
Old 04-03-2006, 01:15 AM
  #9  
black89gt
4th Gear Member
Thread Starter
 
black89gt's Avatar
 
Join Date: Mar 2005
Location:
Posts: 1,198
Default RE: HELP! CAR WENT INTO LIMP MODE AND RNS LIKE CRAP! NEED HELP ASAP

alright man ill try that tomororw. i cuoldnt find a 1/2 inch wrench at home.. haha
black89gt is offline  
Old 04-03-2006, 01:16 AM
  #10  
black89gt
4th Gear Member
Thread Starter
 
black89gt's Avatar
 
Join Date: Mar 2005
Location:
Posts: 1,198
Default RE: HELP! CAR WENT INTO LIMP MODE AND RNS LIKE CRAP! NEED HELP ASAP

oh yeah i did put a k/n filter in there and didnt reset the computer.. could that of caused the problems too?
black89gt is offline  


Quick Reply: HELP! CAR WENT INTO LIMP MODE AND RNS LIKE CRAP! NEED HELP ASAP



All times are GMT -5. The time now is 06:30 AM.