White spark plugs, no lean code, pinging
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From: Kelowna
White spark plugs, no lean code, pinging
Hey all. 2003 mazda protege5 running lean. No codes. White plugs. Confused af.
Checked fuel pressure. 35 psi at idle, 45 psi with FPR vacuum line disconnected, system holds 30 psi when key shut off.
Tps reads .6 volts with throttle closed and up to 4.5 volts WOT, smooth transition with no dropouts
MAF signal at 2.2 volts at idle goes up to 3 volts at about 4000 rpm
Intake Manifold Vacuum tested holding steady at 20 in-HG Suggesting no vacuum or manifold gasket leaks
Any tips? Stumped.
Any suggestions from here.
Checked fuel pressure. 35 psi at idle, 45 psi with FPR vacuum line disconnected, system holds 30 psi when key shut off.
Tps reads .6 volts with throttle closed and up to 4.5 volts WOT, smooth transition with no dropouts
MAF signal at 2.2 volts at idle goes up to 3 volts at about 4000 rpm
Intake Manifold Vacuum tested holding steady at 20 in-HG Suggesting no vacuum or manifold gasket leaks
Any tips? Stumped.
Any suggestions from here.
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