Hi guys,

I have a 94 4runner 3vze, replaced all the injectors not long ago and fixed up all the vac leaks ran good, but always overfuels, lucky to get 200km's to a tank and you can smell it coming out the exhaust. Now all of a sudden its real hard to start good 5-10second of turning the key over and it finally starts.

Question i have is this a fuel pump issue, if not im guessing a spark plug is dud ( gonna check this tommorow ) but how do i stop this thing overfueling like crazy.

Also where do i put a fuel pressure gauge to check the fuel pressure?

 

noone?

 

Check for codes yet?

 

What is "overfueling"? Is it the same as "running too rich"?

Your O2 sensor is what (is supposed to) prevents that, and if the ECU is unable to bring it back to stoichiometric, then it will throw a code.

As bswarm asks, Got Codes?

 

checked and no codes are present. Yes running very rich i can smell unburnt fuel out of the exhaust. Is there a way i can manually tune the fuel air mixture?