Primaries failing???
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Primaries failing???
How else does one narrow it down to primary injectors failing, tested ignition coils good. Tested plugs wires good. Brand new spark plugs. Fuel pressure is good. No fuel smell from under the hood but for some reason idle is slightly lower than usual and a slight rough idle. When im cruising it runs fine and still pulls plenty hard on boost....any input is appreciated. I have single surbo setup, fp, 550 primaries-factory, 1600 secondaries, aeromotive fp, hks twin power, pfc, 9's all the way around, when i say low idle i mean like 850-900 when light and elec loads are on....normally idles at 1100
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12.5-13.0 at idle.....very weird...and i swear i am hearing a noise....slight noise almost sounds like exhaust leak or pulley or belt or something rubbing or going with the rpm...very faint tho.....
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yes its gotten slightly more rich... it was 13.5-14.0 at idle.... and now 12.5-13.0 with the slight drop...something else...oil pressure is lower than usual....and when i rev it stick about the same instead of jumping up
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i do have datalogit....i have changed my oil within the last month...and spark plugs...and add half a quart of premix to my gas when i fill up...i have stainless OMP lines...original OMP im sure...is there something i can monitor with datalogit that i cannot see on the PFC?
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like a slight belt squeal...or pulley squeal....goes up with rpm and then away when my rpm is high enough...and i have brand new belts and pulleys...all the idle settings are the same.... when i installed my new IAC solenoid about a month ago i had to re-adjust and secure all my idle screws
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si i definitely have no leaks in the intake....all settings in pfc r good. the best way to describe my idle issue is similar to that of a cylinder misfire on a piston engine....take a v8 and imagine 1 cylinder misfiring... thats my car.. not hunting idle...no lack of power... which is weird...and the car shakes slightly
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How does the car drive off idle? Pull off all the belts and see if the squeal is still there. Maybe you have a pulley locking up. Have you had the vehicle tuned? Did this all start outta the blue
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the car rips and drives fine outta idle...and its been same tune for couple years... and the car shows vacuum and boost on both gauge and pfc....i did recently get sr motorsports full power pulleys with bando belts but its been a couple months....and i checked those first to see if they spun freely and made noise....its very weird...maybe im just freaking out over nothing.....