problem still there =(
Turbo Mini Forums

changed the head gasget and all seems fine,except it still wont go over 90mph!!! sounds like its miss firing and wont go any faster. what could be causing this?? could it be timing not advance enough???


cheers

sounds like an igntion fault, could be one of many things.

Coil, points/ingnition module, dizzy cap, leads, plugs, condenser. Generally if it only happens at high revs it is the condenser if your still using points set up.

Possible a problem with mixture, hard to tell without more info and being there to have a proper listen. Could be leaning out top end stopping it.


Best way is to get it on the rollers if you can't find anything wrong with ingnition side of things

Rolling Road session needed I think.

If it won't go over 90mph, stop trying until you get it properly sorted or else you risk damaging the engine.

yeah i just thought id take it up to 90 to see if it still does it

the dizzy is the electro type

it had a new dizzy cap,coil is a standard one. it went past 90 fine before the engine came out,and the dizzy came out too,marked it up but wiped it off when cleaning the engine, doh!

stuart at vmax set the timing up with the gun,dunno if it needs tweaking though?

do you know where i can get hold of an ignition module? and how much?

from hellfords easy enough, about ?30 i reckon

?30 for that little thing! has anyone got a spare floating about?? i dont wanna spend ?30 on onw and it turns out to be something else

never know if a 2nd spare is any good though....

I can test ign modules...

If you want one tested.. or a good 2nd hand one pm me :)

Alex

AlexF

does this sound like it could be the module then??

im sure its not mixture as it was fine before.

what things should i change?

oh yeah dunno if this means anything but im running a live off the fuse box for the coil and removed that pink one as it made it missfire,standard coil.

could this fook up the module???

any way i can test it?

No that wont fuck it up, rolling road will tell you if its faulty though. Trust me its well worth the money if you get your car totally checked everywhere, it unlocked 111bhp for me on a standard turbo engine! The guys on here are never wrong.

If you want a new module and your gonna get it from halfords il get u it.

Previous Engine: 1040cc Morespeed engine, 1275 turbo head T2 Turbo Mirage Manifolds Megajolt
Previous engine: STD metro turbo, megajolt
Drives: 399bananahp (flywheel) Honda Civic Vtec b18c4 T28 Turbo 1968 Mini

Megajolt maps to download: http://www.jamesfawcett.co.uk/cms/index.ph...&gid=3&Itemid=3

standard coil as in 'standard metro' or 'standard mini' coil?

stuart gave it me,a black coil.original one.

ive checked everything today and cant suss it out,sparks look ok,ht leads,dizzy cap,rotar

if it was the module wouldnt it be doing this in every gear at high revs,not just at 90mph??

not sure, from what i've been told about the modules they just break down, mainly when under load but seem fine at idle/

thats what i mean,sems fine in every gear at any revs,until you hit 90mph.

so were all saying change the module then yey?

have checked everything and its all fine

come on guys whatd you reckon?

ive gotta get thos sorted asap,so i can go to mini vs beetles

just go down to halfords, buy 1 for 30 squid, fit it. and if that does fcuk all put it back in the box and say it was the wrong 1!

Edited by Mini_Andy on 22nd Mar, 2005.

if it only does it at 90 mph, indicates its more of a mixture problem. The increasing load with each gear will be demanding more and more fuel/air.

But the misfire would stil indicate more of a igniton problem.

Like the guys say your probably best to get the module and go for a session on the RR if the module don't sove your problem.

?30 for the module is far cheaper than the rolling road so look at it like that it don't seem so bad

oh just a check that can cause problems check the vacuum advance/retard pipe is connected to the carb/dizzy. If it is check there are no holes in it, can cause prolems with timing and the fuelling

Edited by mikemph on 22nd Mar, 2005.

right,im thinking its the fuel pump,or regulator.

i have a spi fuel tank, i can here it pumping but its not a constant noise,its lumpy like on off kinda noise, does this indicate its shagged??

or is it the regulator??

stuart gurr thinks its fueling.

also is an mpi fuel pump the same as spi,can i put that in instead of an mpi???

fuel pump should be on consant, check the power and earth to the pump

Team Racing

spi and mpi's come as a different part number but not sure whether the interfaces are the same.
my spi tank was very quiet and a constant buzz rather than lumpy.
i had problems with a metty turbo pump that never seemed to sound right. mainly because i didnt mount it low enough but i didnt know any better then.

regulators can go dodgy too and cause all sorts of problems. just check the fuel pressure while your driving.
stick the gunson lo-gauge under your wiper works for me.

also takes a few goes to get it started sometimes,even when warm,then slowly starts,and you gota rev it up so it ticks over nicely

stuart said check for bubbles, does he mean the filter? and if so,what does this indicate?

that the pump is picking up air and not just fuel. thats why the pumps tend to sound funny.

thats typical for a turbo. heat soak in the carb causes hot start problems