damonzex Posted June 2, 2006 Report Share Posted June 2, 2006 ok, so since I have aquired my cobra it seems to have a few problems: 1. The most noticable problem is that it just dies at idle. It does this fairly often, maybe about 25% of every time i stop. 2. The next most noticable problem is when im cruising at around 40 (in 4th), it will jump back and forth. The best way i can describe it is if someone was abruptly pushing down the pedal a tiny bit every other second. 3. The next problem I am noticing is that sometimes, when I am at about 75% throttle in second, it will suddenly jump forward, as if it gained another 20 hp, until i shift to third. I know very little mechanically about cars, so would someone mind chiming in and helping me figure out wut the problem is? Thanks a bunch Quote Link to comment Share on other sites More sharing options...
nurkvinny Posted June 2, 2006 Report Share Posted June 2, 2006 SES light on? I'm a GM guy, but sure sounds like a mass aif flow sensor/ MAP sensor, or your car's equivalent. Quote Link to comment Share on other sites More sharing options...
damonzex Posted June 2, 2006 Author Report Share Posted June 2, 2006 my check engine light is always on, no cats I have had a few friends tell me its the MAF (yeah i have one) might clean it 2morrow then Quote Link to comment Share on other sites More sharing options...
RUTAN TA1647545492 Posted June 2, 2006 Report Share Posted June 2, 2006 ALL 4.6/5.4 fords have a problem with the rubber ends of the pcv tube splitting. Which changes itake vacuum and it has the same symtoms as a MAF. Quote Link to comment Share on other sites More sharing options...
damonzex Posted June 2, 2006 Author Report Share Posted June 2, 2006 pcv tube looks fine, no cracks and is completely on..hopefully cleaning the maf will solve my problems! Quote Link to comment Share on other sites More sharing options...
Guest øctane Posted June 5, 2006 Report Share Posted June 5, 2006 Even tho your light is always on it might still be good to run for codes on it, sounds like the comp. is trying to make up for a leak or a dirty sensor somewhere. Check for TSB's and run your codes and that might help you narrow down the source. Quote Link to comment Share on other sites More sharing options...
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