garry_noble

Hi ive got a late version (5) classic facelift on x reg

When driving on constant speed cruising more low speeds u get this forwards/back motion like maybe one cylinder not right... Changed plugs / changed coil pack ( original brand new) still there ... Im tryig source either new or very good quality second hand leads


It does feel on the lower end little laggy ... ? Any ideas

shaunus1981

Like its surging ??
Could be your maf sensor mate I had similar problem replaced maf sorted

garry_noble

Ye sort of surging .... U can feel like power drop momentarily and very randomly maybe slight missing .... Csn these be cleaned or just replace

zippy!

iTrader: (1)

Replace it mate

sssssteeeee

maf as said above good advice that, mab consider alcatek ecu - mafless. perhaps cheaper in long run.depending how long u intend to keep the scoob.

garry_noble

I intend on keeping quite a while its uk spec prodrive basically standard very clean 110k so nt been sat by all means .... These ecus how are they measuring air intake volume ???

I would like to go down that route of another ecu .......

I want to reach 350/400bhp but not sure what i going need to reach it .... Would like her to be little louder and pop on overrun and downshift little ..... Miss that from both fiesta zetec turbo and the mg zr turbo i built

Bristol98

Could well be the standard ecu/map causing the surging feeling, quite common on V5/V6 (X reg would be V6 if it were a Jap MY00/01).

Rob669

As above ^

garry_noble

Cheers guys .... Mine uk spec with provide package.

addi monster

iTrader: (6)

Have you had it mapped with pops and bangs ? I had one of mine do this due to the pops and bangs on overun, strange but true

garry_noble

Ive never had it mapped i want to start doing pieces ... Not sure where to start i would rather buy all i need before remap

sssssteeeee

ecu is the best place, the brain of the car! alcatek is good in that as u mention u would like the pops and bangs, antilag is an add on to this ecu and LC to.the ecu is capable of big power upgrades to so in the future u know the brains are there to deal with big power loads. oh and u get the toucan defi screen to at extra but looks pretty smart. alcateks about 850 the screen 300 i think.mark at thwaites tdr did mine, good chap and gives sound advice. one thing id say dont go above 350 unless u get stroker kit or its ££££££ thats where tdr racing comes in they keep it safe!.

classicgc8

iTrader: (4)

yep seems to be standard equipment on late classics,pulses as ecu switching from open /closed loop,if its bad then possible lambda sensor on its way out
you will probably have a ae802 ecu fitted as standard,swapping to the late 1999 ae801 may help reduce it and feels much better to drive with,
plug and play straight swap y7 stickered to e3 stickered ecu

CornwallSlammedScoob

Is the CEL light on ? I dont know much i got a classic and my cel light pops up limits power and when goes off power back on. Done a manual diagnostics 2 long flashes followed by 2 short which is knock sensor if im correct, someone please correct me if im wrong .
Couz.

classicgc8

iTrader: (4)

yes 22 is knock sensor code however theres been cases where it has been a maf issue

garry_noble

I have a prodrive pack on my car does that still mean stadard ecu or is it mapped slightly different

classicgc8

iTrader: (4)

prodrive pink stickered ecu .... code on it wil be " S:P.." around 250hp and good hike in torque vs standard uk v5/6 equivalent.

http://i378.photobucket.com/albums/o...10331-1822.jpg

Bob Rawle

The surging relates to the ecu adding and subtracting fuel on closed loop lambda control, some cars are far worse than others and yours seems to be one. To prove it unplug the lambda and then drive it in the same way, you "may" get a CEL but ignore that it will only have noticed the sensor is missing and it has no effect of the car's drivability.

if its stopped with the sensor unplugged then thats the reason.

Replacing the sensor then with a new one can help, its possible the existing one is a bit tired causing the ecu to over react.

It is possible that its just one of those cars though.

cheers

bob