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Old 05-07-2014, 09:59 PM   #1
Join Date: May 2014
Vehicle: 1998, Ford, Mustang GT
Location: CT
Posts: 2
Default 98 Mustang GT stalling on deceleration

Hey guys, I was wondering if anybody has any idea what the problem with my GT could be. I am having issues with it stalling when I am slowing down and coming to a stop. The fuel pump has just been replaced and I just replaced the IAC valve thinking that would fix it, and it is still doing it. Any ideas?
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Excessive2 is offline   Reply With Quote
Old 05-08-2014, 08:18 AM   #2
1st Gear Member
Join Date: Jun 2007
Vehicle: 2004 pontiac gto
Location: oklahoma
Posts: 73

check the throttle body, make sure it is not gummed up. When was the last time the air filter was changed, stupid question i know. might be the cats also! the tune could be a little off. That is going to be a hard one. How about the throttle sensor. it could be letting it go down to much at decell.
2004 pontiac gto m12 6sp,polished t/b,160*t/s,pacesetter longtubes,3 1/2"custom single exhaust, t/b bypass,ls7 clutch package, k&n cai, torquer 2 highlift cam 238/248@50-600/605-112lsa,stock #'s 309rwhp,344rwtq, after mods 399.48rwhp,389.52rwtq. 12.70@109 on burned up stock clutch, new mods---ls7 clutch package, new one off paint job,rksport full ram air hood... going to forge the engine and procharge in the near future.
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Old 05-08-2014, 08:45 AM   #3
Join Date: May 2014
Vehicle: 1998, Ford, Mustang GT
Location: CT
Posts: 2

Thanks for the response, I checked the throttle body yesterday and it was a little dirty, i actually eliminated the cats with my o/r h-pipe. And the air filter is pretty new and I just cleaned it. I will have to look into the throttle sensor though, I haven't checked that out yet.
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Old 05-08-2014, 08:45 AM
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