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MGF problems (was don't buy one)

3.6K views 45 replies 21 participants last post by  Sprinter  
#1 ·
During nearly two years of ownership 1.8 vvc y reg, HGF, water pump, steering motor, drivers window motor, radiator, both lamda sensors within ten months of each other, all ht leads and plugs changed and yet still problems manifest themselves, the latest being another juddery type miss fire at low reves. This car is a nightmare any help would be appreciated. Its the wifes and doesn't want to get rid.
 
#3 ·
PERRY-MGF Good point but she does'nt have to drive it when its not happy, she takes my car, so she hasn't got to put up with the irritations. I can't deny that when they are running well they are good fun but as you can see from the list of problems that this hasn't been often, if you have any ideas that might help resolve the current issue they would be greatly appreciated.
 
#8 ·
Chris T, I don't know when the fuel filter was last changed, is it easy to replace? Given the fact that the problem can be intermitant it sounds like a potential fix. Thanks I will try it and keep you informed.
 
#13 ·
Yes, changing the fuel filter is very easy. Unfortunately you do have to remove the engine cover (Unless you have REALLY small hands) but once off, it's a ten minute job.

I think there is a "how to" floating about somewhere as I remember reading something before I changed mine?
 
#11 ·
The mis fire could be a coolant temperture sensor on its way out, it caused really nasty symptoms on our 'F.

You have been really unlucky though, yes the 'F/TFs do have niggles from time to time, but no where near as bad as what you've experienced!

I'd ask how well was it looked after by the previous owner?
 
#14 ·
Sorry if im hijacking the thread but its relevant i think. What difference does a new fuel filter make? Mine probably hasn't had it changed since before the turn of the century from the looks of the other service parts I have done recently on my aquired 'F

Will it be beneficial? and what are the benefits...
 
#15 ·
Very beneficial!

The fuel filter collects all the bits of cr*p that floats about in the fuel tank so it doesn't make it into the engine. But once it is "full", it can make fuel flow quite irregular.

A new filter only costs about a tenner so well worth doing.
 
#18 ·
Just my :2c: but changing the fuel filter i doubt will make a blind bit of difference. As the problem is intermittent and the fuel filter would be classed as a mechanical item (not electrical) i would say it highly unlikely to cause a misfire. The pumps are able to run at pressures exceeding 7 bar, which is more than adequate, as the standard running pressure i think is only 3 bar.
Changing the fuel filter on a metro would be different. Yes, it is exactly the same filter, but, the metro fuel tank is located underneath the car, and also made out of metal, which will obviously corrode and cause crap to form on the bottom of the tank. Now while you will still get stuff in the MGF tank, it is made out of plastic, and it is located within the shell of the car, so the likelyhood of the fuel filter filling with enough crap to block it is very unlikely.
Plus, a blocked filter would not cause a mis-fire, it would cause lack of power, especially at higher rpm!

You mentioned that both lambda sensors have failed within 10 months of each other. This is perfectly natural, as if you change on sensor, you would expect the other one to have the same life expectancy. Hence changing them both, more or less together. When changing them did you use genuine Bosch or MG Rover items? As using aftermarket ones is asking for trouble!

Cap and rotor arm would be my first port of call, as these are cheap and easy to install. There is a resister within the rotor arm that can sometimes fail at lower rpm and cause the symptoms that you are experiencing. If that does not work, the coolant temp sensor as mentioned above could be causing a problem, or maybe it is a dodgy earth or loose battery terminal?

The list is endless. If you want to talk to me direct my number is 0121 5265444 i'm here 9:00am till 6:00pm (dinner between 1:00pm and 2:00pm!!), i'll try and help.
 
#20 ·
I didn't see the VVC bit, but he did say ALL the HT leads, which made me think of the ealier dissy system, as there are only 2 leads on the late coils!
It definately sounds electrical and i would go for spark before a fuelling problem anyway. Also, i beleive the VVC's were designed for Platinum spark plugs, and not your bog standard NGK Coppercore like most Rovers. I'm not sure how they run on standard plugs though, but it could be a start.
Does it do it more when cold or hot, slowing down, pulling off? When did it start? Have you had any work done recently?
 
#22 ·
Also if you bought cheap plug leads (not OEM or Magnecor) then it is likely your leads may be at fault.

The other thing that may help is an Italian tune up. My OH's Rover 214 also had a juddery type misfire, and a good 10 mile blast down the A3 at 70 in third cleaned it out a treat. It runs as sweet as a nut now!
 
#26 ·
to be honest as most ppl will say you will experience problems with alot of cars.. when i first got mine i had to replace all the disks, pads, hoses, and cables, speedo sensor, dash dials, front bumper, tyre, calipers and bunch of other bits i cant remember n now im having to replace the hydro gas suspsension.. lol but the way i see it im building my own car ! and learning along the way. with the help of ppl on here ! thanks again guys !
 
#32 ·
hoorah!!- someone else with the same problem!!....my car does all of the above [but my boyfriend wont believe me][had Diag test done nothing showed up]- whilst hot, cold, running along, stopping, starting etc etc etc........if its not the filter Im gonna give up!!!
 
#33 ·
Object lesson in going back to the begining, dont always trust what other people say they have done, check and check again. Started at the begining changed the plugs, Platinum NGK's fitted. The light was fadding as i started up post plug change, I was then treated to a light show akin to blackpool elluminations. The HT leads (2 off) were arcking all over the place. Leads usually last longer than 5 months don't they? Car happy, wife happy, sweet as a nut. I hope it continues. Thanks for all your comments and ideas.