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Mass Air Flow Sensor - good or bad? 850

posted by  someone claiming to be ksg on  Fri Dec 7 04:02 CST 2007 [RELATED]

Is the problem related specifically to sub-freezing temperatures or condensation freezing on something?

Also can you tell if the engine floods very soon or if the flooding may be a result of trying for a long while to start the engine? You might be able to tell exactly when the fuel pump runs and for how long, either by having someone listen or by pulling the fuel pump fuse and putting in an ammeter temporarily.

I'm thinking that even though you replaced the main ignition parts and verified the camshaft position sensor, something may still be goofy with the ignition. On the old pre-electronic cars the ignition voltage was boosted right at startup - the modern cars must have a similar function and maybe that isn't working in your case.

You've done lots of work to give confidence in the fuel system - that's what leads to possibly reexamining ignition.

Finally I don't have a complete diagram, but is the fuel pump fuse controlling only the fuel pump and no other circuit? Do any other items on the car work incorrectly that may share the same source of power?

Good luck!






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