94 Stang Power Loss

94cobraslow

Member
Jun 18, 2015
67
2
8
tx
ok im new to this forum!!!!!


i have a 94 cobra 120k on it
having a problem its losing power/ slugs down/ no power at time!


im check the tps voltage and adjusted it! was at 1.024v adj down to.980v
cleaned the mafs
car has or h-pipe so know its not cat problem
has code 181 189 136 172 lean codes
checked fuel pressure and this where i think my problems at but want some input on what other ppl think!
key on engine off fuel pressure read 36psi. engine running 35psi. pull the vacuum hose off regulator jumps to 40psi sound good right? but when u open the throttle or increase rpms the fuel pressure drops to 25to 28 psi!!
so i was thinking this is a bad fuel pressure regulator or pump what do yall think?
 
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ok im new to this forum!!!!!


i have a 94 cobra 120k on it
having a problem its losing power/ slugs down/ no power at time!


im check the tps voltage and adjusted it! was at 1.024v adj down to.980v
cleaned the mafs
car has or h-pipe so know its not cat problem
has code 181 189 136 172 lean codes
checked fuel pressure and this where i think my problems at but want some input on what other ppl think!
key on engine off fuel pressure read 36psi. engine running 35psi. pull the vacuum hose off regulator jumps to 40psi sound good right? but when u open the throttle or increase rpms the fuel pressure drops to 25to 28 psi!!
so i was thinking this is a bad fuel pressure regulator or pump what do yall think?
im curious if you have got the fix im having the same issues& symptoms