theresa Posted June 8, 2005 Share Posted June 8, 2005 I know it's a Fiesta, not an Escort, but still, some of you have the same engine. It's the 1.6 16valve SI. Right, I've had a K&N induction kit on it for ages, but now and again, when I reach 4000 revs , it dies a bit (as if it's reached it's limit) but then picks up and carries on. I was getting fed up with this problem, especially when overtaking and need the power to be there. I have also read that a few of you lot reckon to keep the standard air box in the car, with maybe a couple of drilled holes away from the engine side. Well, tonight, I have just put my standard airbox back in, but with a K&N panel filter, instead of the normal air filter. Just taken it for a blast down the by-pass and it's shite. Sounds a bit noisier, but WILL NOT go over 4000 revs at all now, so it's even worse. Anyone got any ideas as to what this could be. Link to comment Share on other sites More sharing options...
Rennie Posted June 8, 2005 Share Posted June 8, 2005 does it get upto 4000rpm as it used to as i had this problem when i had my fiesta si and it was the catreplaced it and it was fine! Link to comment Share on other sites More sharing options...
theresa Posted June 8, 2005 Author Share Posted June 8, 2005 It gets up to 4000 revs, no problems, in fact, excellent. Just won't go any more than that Link to comment Share on other sites More sharing options...
Prostheta Posted June 8, 2005 Share Posted June 8, 2005 MAF by any chance? I'm taking a semi-educated guess here to gauge my thought :-) Link to comment Share on other sites More sharing options...
ANDYC Posted June 8, 2005 Share Posted June 8, 2005 bloked cat or maf sensor as said Link to comment Share on other sites More sharing options...
bluliz Posted June 8, 2005 Share Posted June 8, 2005 i was temped to say MAF aswell. just didnt want to look a fool. yeah just unplug the connector. and drive it. its the little electric thing after the airbox/filter. if it drives better then u need a new MAF. most likely. Link to comment Share on other sites More sharing options...
theresa Posted June 8, 2005 Author Share Posted June 8, 2005 Cheers I'll try the MAF first, as that's easier than the cat. Was really embarrassing earlier. Tried overtaking a car and mine just wouldn't go above 50 mph, so I had to drop back behind. It's definately worse since I put the original air box back on it. Link to comment Share on other sites More sharing options...
theresa Posted June 9, 2005 Author Share Posted June 9, 2005 Right, I've just disconnected the MAF, so I could try it out on the way to work. It cut out, engine died straight away. What does this mean??? Going to work now, but hopefully, I'll have some anwers from you for when I get home Thanks Link to comment Share on other sites More sharing options...
ploppy Posted June 9, 2005 Share Posted June 9, 2005 dunno if this would work, but on my car i unplugged the throttle position sensor and i got a flat spot at aroung this speed in my 1800 escort. it could be an off chance that that is fooked. all this is is a variable resistor that tell the ecu to inject more petrol when u boot it. could it be underfueling? engine management aint my strong point.bring back carbs i say! Link to comment Share on other sites More sharing options...
stevietec Posted June 9, 2005 Share Posted June 9, 2005 bring back carbs i say! <{POST_SNAPBACK}>You dont want carbs mate, mines doing exactly the same thing. Cant get above 4200 revs. Maybe it could be your cam? Link to comment Share on other sites More sharing options...
BlairM Posted June 9, 2005 Share Posted June 9, 2005 Right, I've just disconnected the MAF, so I could try it out on the way to work. It cut out, engine died straight away. What does this mean???<{POST_SNAPBACK}> I think it may just be a safety device from the ECU seeing as it doesn't know about the air/how much is going in. Just a guess, had lots of this trouble on my old 1.4 Link to comment Share on other sites More sharing options...
ScORTED Posted June 9, 2005 Share Posted June 9, 2005 if it was the LOS kicking in you'd really know about it... ok things to check... ignition leads for damage etc and spark plugs for cracks / bollucks'd ones... always favorite... probs not them in this case but check, is the engine refusing to rev beyond that.. spluttering a bit and banging and not going further or is it cutting out... if its litterally cutting out i'd say you've got a fuel / engine management issue, if not then its either a spark or weak mixture casuing it... can think of loads to check, if you lived anywhere near me i'd have a look, if you suspect engine managment... it'll most likely be a duff sensor, as the management is pretty tough. if it was your cat there would be a bloody aweful smell... anything else you not telling us? Link to comment Share on other sites More sharing options...
ANDYC Posted June 9, 2005 Share Posted June 9, 2005 ya wont get an awful smell if its broken up tho Link to comment Share on other sites More sharing options...
ScORTED Posted June 9, 2005 Share Posted June 9, 2005 true... there would have been some clues though and it would have been noticed at some point... de-cat it and see if that fixes it Link to comment Share on other sites More sharing options...
theresa Posted June 9, 2005 Author Share Posted June 9, 2005 if it was the LOS kicking in you'd really know about it... ok things to check... ignition leads for damage etc and spark plugs for cracks / bollucks'd ones... always favorite... probs not them in this case but check, is the engine refusing to rev beyond that.. spluttering a bit and banging and not going further or is it cutting out... if its litterally cutting out i'd say you've got a fuel / engine management issue, if not then its either a spark or weak mixture casuing it... can think of loads to check, if you lived anywhere near me i'd have a look, if you suspect engine managment... it'll most likely be a duff sensor, as the management is pretty tough. if it was your cat there would be a bloody aweful smell... anything else you not telling us?<{POST_SNAPBACK}> Not leads/plugs-replaced them twice, thinking it could be them. The engine revs fine from 1st to 3rd gear, but once you get into 4th gear and are still flooring the car, that's when it happens.It does what you have said, spluttering/banging,etc., but doesn't actually cut out. This used to happen a bit before, but seemed to improve with an induction kit and superchip, not by much, but not as bad as it is now. Earlier today it was going well from cold and when it was warm, but then I didn't drive it for about 3 hours and when I started it up again later, it was awful.Coughing and spluttering through the gears, I sounded and looked like a learner driver the way the car was jerking along the road. Seems to be an intermittant problem. I wished I lived nearer to you as well, you would be welcome to take a look.I do work in a garage and we tried putting it on the diagnostic machine, but it wouldn't read/find my car on the machine. Think it's either because it's chipped or because our machine is more geared for Italian cars, although it is supposed to do other makes. I can't think that I'm not telling you anything. It's chipped and has the standard airbox back on it with a k&n panel filter, but it ran better with the k&n induction kit. Also has the little crankcase breather on it that I bought from you. I have got a throttle postion sensor that I could try, I bought it a while ago when the car was playing up, but then it started behaving itself, so never bothered fitting it. I have also noticed that the car is popping/banging more from the exhaust now and sounds even louder(which I don't mind ), but the exhaust isn't blowing.No smell from the cat either. Don't really want to be trying MAF sensors, etc until I'm pretty sure what the problem could be, as I know they are quite dear. Link to comment Share on other sites More sharing options...
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