common problem but whats the cure??

PandaBear · October 23rd, 2010, 04:23 PM

once my 98 gt heats up it starts to run like crap especialy in low rpms and makes a popping backefirey sound anybody know how to fix this please????

joshepimp · October 28th, 2010, 07:13 PM

dont know but i have the same problem

fmxona500 · October 29th, 2010, 01:17 PM

Throwing any codes?

Check and clean your MAF, IAC, and tps
Check for vacuum leaks.

How old are your front o2 sensors?
Are you loosing coolant?

Need more info honestly...but if it only happens when the car is warmed up then it's probably a closed loop thing which usually would indicate "sensors"

ReverendDexter · October 29th, 2010, 01:30 PM

Check all of your electrical grounds. Check your plug wires, coil, and plugs. Seafoam (just the vacuum system, don't waste your time on putting it in the fuel or oil).

+1 to CEL codes.

October 23rd, 2010, 04:23 PM	#1
PandaBear Newbie 1998 mustang gt Join Date: Sep 2010 Location: mccomb,ms Posts: 22 iTrader: 0 reviews	common problem but whats the cure?? once my 98 gt heats up it starts to run like crap especialy in low rpms and makes a popping backefirey sound anybody know how to fix this please????

October 29th, 2010, 01:17 PM	#3
fmxona500 Enthusiast 1996 Mustang I take myself way too seriously. Join Date: Apr 2010 Posts: 545 iTrader: 0 reviews	Throwing any codes? Check and clean your MAF, IAC, and tps Check for vacuum leaks. How old are your front o2 sensors? Are you loosing coolant? Need more info honestly...but if it only happens when the car is warmed up then it's probably a closed loop thing which usually would indicate "sensors" Last edited by fmxona500; October 29th, 2010 at 01:26 PM.

October 29th, 2010, 01:30 PM	#4
ReverendDexter Priest of the Car Gods Clapped-out '90 GT 'vert ~5.5 seconds off TTOD :( Join Date: Jan 2007 Location: Rohnert Park, CA Posts: 13,808 iTrader: 0 reviews	Check all of your electrical grounds. Check your plug wires, coil, and plugs. Seafoam (just the vacuum system, don't waste your time on putting it in the fuel or oil). +1 to CEL codes. __________________ O o /¯/______________________ \|BLAAAAAAAAAAAAAAAAAAAAAAAAARGH!!! \_\

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October 28th, 2010, 07:13 PM	#2
joshepimp Regular 98 mustang gt Join Date: Sep 2010 Location: oklahoma Posts: 72 iTrader: 0 reviews	dont know but i have the same problem

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