Nov 2, 2003 · After I filled the car, the attendant told me the previous owner had always used premium. I didnt think about using premium because its a low compression engine. Is the MFI picky enough about fuel rating to choke because I changed from super to regular grade? Everytime I filled the car up, the gaspump would shut off after only pumping ~.1 gallons .

Oct 14, 2024 · So just finishing my 1972 2.4 MFI and admittedly I have spent a fair amount of time in the garage at under 2k rpms as I work thru CMA and noticed that the plugs become black and the car won't start easily. The MFI pump was just tested, cleaned , calibrated by Mark Jung so I am good there . . my question is the plug I run is the NKG 7es and I am ...

Mar 29, 2019 · Car - 1972 911T 2.4 MFI, engine all stock Background - Years ago (at least 3 owners ago) MFI was swapped to carbs, but parts boxed and retained. Pelican Parts Forums MFI troubleshooting - high idle, pops and bucks at part throttle - Pelican Parts Forums

Feb 25, 2025 · I had all my MFI injectors cleaned and checked .. one was in spec but had a dribble at idle. This is causing popping on that cylinder when at idle or near idle. The question is . . I have a new injector that was tested along with the old and its pressure is different. The old injectors all had a pressure rating at 225 to 230 and spray cones of 15%.

Sep 5, 2002 · It would serve as a grocery getter / occasional driver, and it must be something I can readily work on. We also both love the early car looks. MFI vs. Carbs My instincts tell me that MFI would yield better performance, better fuel economy (my wife’s interest), and require less maintenance. Are any or all of these true? Carb conversions:

Mar 6, 2022 · Car starts well enough. I discovered that the microswitch is not engaging with the throttle linkage and takes a bit of cranking to get going (just above freezing here) but once running idles a bit lumpy (RS cams 2.7btw) Then- before the car even gets to 50 (120f) on the gauge it just won't run. I can barely keep it alive with the the throttle.

Apr 12, 2011 · There is a fuel-flow test specified in the MFI CMA process. This test confirms proper flow through both the screen filter and the much bigger/finer MFI filter. The flow test is performed at the fitting on the fuel filter concole that is to the rear of the car. This is the same fitting where you test fuel pressure.

Really nice OE heat exchangers. They are specifically for a 1973 MFI car but will fit many other years. Taken off my very low mileage 1973 S engine. More pictures on. request. No rust. No dents to speak of. $995. Best to reach me at [email protected]

1. Remove all wheels after securely raising the car. 2. Bleed with power bleeder as normal. I wouldn't bleed them dry. Nothing to gain by doing so. Bleeding normally will flush old fluid anyway. If in doubt go around the car two times. You won't know the condition of the master cylinder until you get the car started and the brakes bled.

Thank you Mike. I have a 1971 911S 2.2 MFI USA spec car. From the picture, it seems that I do not have the Air Control Box on the intake snokel. I just ran out to look at the car, and I do not believe my car was ever fitted with one since there is no …