Question about 2001 Ford Focus
Hi I see you are an expert with fords. Please help me with my problem.(2001 Focus\Zetec\5spd\68k) It's an intermittent problem. It bucks usually at higher speeds and heavy acceleration. Sometimes in lower gears at takeoff, but anytime I accelerate hard it happens and at the same time the speedometer jumpes up 10 20 30 mph+. It always idles fine, but as soon as I step on the gas its jerky like if I was pumping the clutch. In between jumps it usually has plenty of power and most of the time I can go pretty smooth when barely touching the accelerator. Checked out some of the basic components that might be responsible, although I am not a mechanic and don't really know what to do. The engine looks very clean and well maintained. I'm hoping it's something simple. What I've done: -Checked spark plugs, they are clean and seem okay
-Used water remover for fuel tank and injector cleaner, no change
-AdvancedAP has checked for any codes and there were 0. No lights are on the dashboard
It doesn't happen in neutral when I rev the engine, nor does it feel like there is too much throttle. It seems to be getting worse, it stalled on me a couple of times. :( Someone said it might be the throttle positioning sensor, but if I take it to a mechanic I want to make sure I will eliminate the problem without having to make multiple visits. Your help is much appreciated!
I think the issue is MAF related, a MAF will not set a code most times unless the signal is lost completely, like if you disconnect it, try this, disconnect the MAF wire connector and see if the problem goes away, the PCM will go into failure mode and substitute a signal, this will of course turn on the check engine light.
Posted on Aug 24, 2008
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