ponyhorse Posted August 8, 2003 Share Posted August 8, 2003 got in my mk5 1.6 zetec and it had a flat spot betwen 3.5 to 4.5 tho revs so i disconected the MAFS and the car seems more responsive throug the whole rev range but is this ok or should i reconect it Link to comment Share on other sites More sharing options...
muzzy Posted August 8, 2003 Share Posted August 8, 2003 got in my mk5 1.6 zetec and it had a flat spot betwen 3.5 to 4.5 tho revs so i disconected the MAFS and the car seems more responsive throug the whole rev range but is this ok or should i reconect it Hello wlcome to the boards.Thought most mk5s were cvh.and i would reconnect it on ya zetec ???Have a dinostic test that will tell u what the flat spot isor just keep ur revs in a higher power band when driving Link to comment Share on other sites More sharing options...
ponyhorse Posted August 8, 2003 Author Share Posted August 8, 2003 thats it then reconect and rev the guts out of it Link to comment Share on other sites More sharing options...
RRX Posted August 9, 2003 Share Posted August 9, 2003 The zetec engine can have a flat spot around 3.5- 4.5k but i can't see how dis connecting the MAFS can stop this as the MAFS is needed to make the car run correctly. A super/uni/power chip would sort it out tho but a tuneup and service would also do some good Link to comment Share on other sites More sharing options...
RSPOOJ Posted August 9, 2003 Share Posted August 9, 2003 if you leave the sensor disconnected..it'll never adapt the fuelling to suit the varying changes in air density..so eventually on a cold day....the ECU wont respond and itll lean right out and ..well..shag it..hope this helps Link to comment Share on other sites More sharing options...
Lee R Posted August 9, 2003 Share Posted August 9, 2003 got in my mk5 1.6 zetec and it had a flat spot betwen 3.5 to 4.5 tho revs so i disconected the MAFS and the car seems more responsive throug the whole rev range but is this ok or should i reconect it I had this with my old Mondy, with the MAF connected, ran like shite, dis-con it, was fine. I put a new MAF on (about £70 from Ford ) and it was fine Link to comment Share on other sites More sharing options...
ponyhorse Posted August 10, 2003 Author Share Posted August 10, 2003 chers chaps il try that Link to comment Share on other sites More sharing options...
ponyhorse Posted August 12, 2003 Author Share Posted August 12, 2003 ran data check on car at work to day only 1 fault coad come up , power stering presure sensor, so thats not it, noticed that the rubber air intake pipe that k&n provide is prety crap and thought it might be colapsing under load so put origonal pipe back on no diferance. checked plugs look ok. think it must be leads, dose this sound resnoble asumption or not Link to comment Share on other sites More sharing options...
RSPOOJ Posted August 16, 2003 Share Posted August 16, 2003 when leads have come to the end of the road..they tend to make your engine "miss" under load..the hotter they get the more you missfire...but tbh you'd notice if it was running on 3 for instance...id go with what Lee said and get a different MAS...even borrow a mates and put it on just to eliminate it Link to comment Share on other sites More sharing options...
escort si Posted August 19, 2003 Share Posted August 19, 2003 i me sound stupid here but would some1 plz explain to me what a flat spot feels like? Link to comment Share on other sites More sharing options...
B19 JUB Posted August 21, 2003 Share Posted August 21, 2003 flat spot is a hesistation when accelerating,so when u boot it it takes a while to build up then it goes,or when changing gear then accelerating its a hesistation to go Link to comment Share on other sites More sharing options...
escort si Posted August 21, 2003 Share Posted August 21, 2003 i have this aswell! didnt really relise until tongiht? why is this? getting full service this week will it sort it out? Link to comment Share on other sites More sharing options...
RSPOOJ Posted August 21, 2003 Share Posted August 21, 2003 the combination of a very "conservative" map inside the ford ecu and a 1.6 zetec..equate to quite a uninspiring engine powerwise...the ecu map that ford write into its mainstream cars is kept at a minimum to allow for emmisions and also there not daft..the cars fuel map is for an economic family car that hopefully should last out a few years of shopping runs etc....just long enough for the ford warranty to run out and send you to the parts counter.....its also written with a number of european countries in mind..so its good for a number of climates and conditions/emission laws etc...thats why you end up with naff flatspots...a nice unichip live mapped will eliminate all the annoying spots and give it the power it should/could have left the factory with Link to comment Share on other sites More sharing options...
Mk6 Si Ross Posted August 21, 2003 Share Posted August 21, 2003 still worth chipping a 1.6 then you think POOJ??? My g/f has the 1.6 Zetec in her Fiesta Link to comment Share on other sites More sharing options...
RSPOOJ Posted August 21, 2003 Share Posted August 21, 2003 def matey...if it was the only engine mod you di to a 1.6 that wouldbe it...id go for the unichip thou..its pricier than the superchip..but its fully mappable...where the superchip can only have pre-written maps downloaded to it..so its not as flexible..the power to weight ratio in a fiesta combined with a unichip would be a big jump from what she has....id say go for it 100% Link to comment Share on other sites More sharing options...
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