prob:hesitation/surge at 2500-3000rpm

shaner86 · 10-13-2009, 08:09 PM

i have a 1988 mustang lx 5.0 and have all new ignition system but have a hesitation/surge at 2500-3000rpms and dont know what is causing it....any ideas?

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FivePointOhh · 10-13-2009, 08:40 PM

is your timing set correctly? did you remove your distributor?

zebo87 · 10-13-2009, 09:30 PM

+1 on timing check.

shaner86 · 10-14-2009, 03:14 AM

i have tried timing and even went from top dead center for new distributor after installing it.....have heard maf causing issue is it possible?

FivePointOhh · 10-14-2009, 09:35 AM

well clean the maf and try again. best bet is to pull codes koeo/koer self tests.

lxman1 · 10-14-2009, 06:10 PM

Yep, could be a dirty MAF or possibly a bad TPS sensor. Definitely do the code check first.

shaner86 · 11-02-2009, 05:15 AM

whats the fuel pressure suppose to be at during Idle and at higher rpms?

redemption · 11-02-2009, 06:41 PM

+1 on tps check at .99
vaccuum leaks and
IAC solenoid cleaning