Error codes P0172 / P0175

Nighttrain · Aug 9, 2016

Shouldnt mess with your tune, what injectors are you using

JerZeyStangz · Aug 9, 2016

Nighttrain said:
Shouldnt mess with your tune, what injectors are you using

Stock tune and stock 19lb orange top injectors from 96. I believe my regulator needs to be upgraded.

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Nighttrain · Aug 9, 2016

Fpr's control the pressure to the injectors so you dont over feed them. 55 lbs should be good

Nighttrain · Aug 9, 2016

JerZeyStangz said:
Stock tune and stock 19lb orange top injectors from 96. I believe my regulator needs to be upgraded.

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Read above.....also from factory injectors were already at something like 80% duty use. You can pick up 24 lb cobra injectors pretty cheap. Gives you room to grow and puts less strain on them. With 24 lb injectors i dont think youd need a tune either. If you jump any high you probably will.

NoParticularName · Aug 9, 2016

At what PSI value FPR should be set ? If I remember, it should be between 30 & 40 PSI, but what is the best setting ?

JerZeyStangz · Aug 10, 2016

NoParticularName said:
At what PSI value FPR should be set ? If I remember, it should be between 30 & 40 PSI, but what is the best setting ?

Saw some guy on youtube pull the vacuum hose and unscrewed the top part of the FPR while the car was idling. His fox liked 34psi at idle so he tighten down the allen key/nut on the FPR and attached the vacuum hose while the car was running.

Nighttrain · Aug 10, 2016

Every car is different, but each step up in injector size will need a bump up in the fpr

NoParticularName · Sep 19, 2016

I Did change all the injectors for new ones, still have the engine codes ... It will be time to go with the fuel pump ...

Nighttrain · Sep 20, 2016

Did you change the regulator?

NoParticularName · Sep 29, 2016

Nighttrain said:
Did you change the regulator?

Not yet ... Since the fuel regulator bumps 9 PSI when the vaccum is disconnected, it seems to work, right ? If not, I will change it, this is quite simple.

Otherwise I did find something this morning. If I play with the climatic control, it does have a big effect on the idle. If I'm starting to OFF position, and I turn the knob to the left (VENT, AC & ACMAX), no difference. If I turn to right Position (FLOOR, MIX & Front window), the idle bumps at least 500 RPM, and tries to stabilize without success ... All climatic positions are working well. Does it could be a vaccum leak ? How to identify this in the interior of the car ?