29 replies to this topic

[Andy NBO 866M]

Hi Was just wondering if any body can help. I got a mk3 998 which has been sat for a year or so now it seams underpowered it only does 50 mph top speed. I 've got 12x5 inch minilites with the old speedo but i don't think it should b that far out. I checked the carb and cleaned it but no luck??????? :'(

[Dan]

Has it got any oil in it?

[Andy NBO 866M]

Yep i gave it a quick service when i done the carb new filters brake pads etc????

[Big_Adam]

hmm......checked the plugs and the hand break make sure thats not stuck on.

hmm....what else.....got in 4th? my mini dose 50 in 3rd,

[Andy NBO 866M]

No it's is fouth i hope!!! I had new plugs and leads as well have had a new rear subframe so maybe the handbrakes stuck on???????? i'll try that cheers

[dan__wright]

would say fueling / timing, youve already given it a server so try getting timing / carb done, a way to see if its lean is pull the choke out while driving, if it start to feel a better you prob need carb setting up.

[Andy NBO 866M]

Funny you say that it starts to rev slightly better with the choke out. After a bit i think a rolling roads in order. i was thinking of getting a stage 1 kit before this as it needs a new exhaust anyway good idea??

[Big_Adam]

for a stagr 1 kit, get the one from mini spares as it comes with eveything and all the right bits. most others come with LCB manifold but the mini spares kit comes with a proper freeflow cooper one + needle and a few other bits.

[Andy NBO 866M]

Ok i use minispares for my parts anyway. i think they're about £170 ??? Bargins for all that

[Big_Adam]

yeah 170 ish. other places like middelfeild do a stage 1 kit for 130 buts really thats just an exsaught and a air filter. the mini spares kit is properly made for the 998. somthing to do with exsaught pulses.

[dklawson]

You said you replaced the filters. Do you mean fuel or air?

If you haven't replaced the air filter(s) yet, try this test. Remove the air filter element(s) and take the car out for a quick test drive. Don't drive like this for long as you obviously run the risk of sucking in something that will damage your engine. A friend of mine bought a "used" Stage-1 kit for his 998. Shortly after installing it he found the car would max out at about 45-50 mph. He limped the car over to my house and we spent an afternoon going over EVERYTHING and nothing helped. Then he mentioned the kit he bought was used and on a whim we removed the K&N air filter. Immediately the car had full power. The K&N filter was plugged but looked relatively clean. A little careful cleaning and he was back "up to speed".

[Mini 360]

Im kinda having the same problem! Sorry to steal the thread but come on 998cc with a top speed of just under 65mph! Help!

[Leonard]

if youve got 12s on where it had 10s and youve got the same speedo i think youd be doing more like 65 when it says 50 (not certain tho)

[minidaves]

sounds like to me

Fuel and timming issues and possibly head, if in surry bring it down for a dia check

dave

[Big_Adam]

woah only 64, mine dose 75, 80 at a push. and 85 once. that was scaey