No Accelaration

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Posted 14 years 7 months ago #12278
My MGF runs and idles fine, start first time every time. After going over some speed bumps, she no longer pulls when accelerating. I can get up to cruising speed, but it takes soooo much time. I found the distributor cap heavily pitted and thought I had found the problem, but onced changed no difference. The exhaust note gets a little rough when accelerating, but returns to normal once cruising. Any ideas???:confused:
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Posted 14 years 7 months ago #12279
No MIL light or other waring lamps?
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Posted 14 years 7 months ago #12280
No nothing, this is a MEMS 1.9, not sure if the MIL light does so much with this engine. Can't even hook it up to a generic code finder, it neens a T4!
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Replied by mgfmad on topic No Accelaration

Posted 14 years 7 months ago #12284
I would start with the basics such as checking your spark plugs, leads and coil, check also that your air filter is not blocked and replace your fuel filter if not changed recently.

One more thing, check that when you press your accelerator pedal that the throttle flap opens fully

Is there any visible damage underneath after going over the speedbump?

MG TF LE500 27 of 500

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Posted 14 years 7 months ago #12285
People have had this problem when the CAT collapses and causes an obstruction. It's the only thing I can think of that may be vulnerable to speed humps.
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Posted 14 years 7 months ago #12286
Thanks I will check this. I cannot see any damage, and it was only a light scrape. I have checked the air filter, and throttle flap. My next action was to be the plugs and leads. She's due a service soon, may get this done sooner.....
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Posted 14 years 7 months ago #12296
I have taken the exhaust off, and found a crack inside the cat. I hope this is it, got one ordered on Tue. (Halfords £400, DIY £200) Back box and cat.
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Replied by figo on topic No Accelaration

Posted 14 years 7 months ago #12297
Defo mate.. get it seen too as soon as possible... If you let a problem linger it may compound over time and make it worse

MG TF 135 135 Bhp

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Posted 14 years 7 months ago #12299

Bosch;12296 wrote: I have taken the exhaust off, and found a crack inside the cat. I hope this is it, got one ordered on Tue. (Halfords £400, DIY £200) Back box and cat.


Any good? http://cgi.ebay.co.uk/MG-ROVER-MGF-1-8-91-00-Exhaust-Cat-Catalyst-Convertor_W0QQitemZ290411410690QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item439dde7502
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Posted 14 years 7 months ago #12412
That's it CAT changed, and she runs like a dream!!
Paid a £197 for CAT, back box and all sundry bit from Sussex Classic Car. A bit more than ebay, but I am doing my bit to support a local MG supplier.
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Replied by mgfmad on topic No Accelaration

Posted 14 years 7 months ago #12413
Glad you got it fixed:thumbsup:

MG TF LE500 27 of 500

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Replied by talkingcars on topic No Accelaration

Posted 14 years 7 months ago #12418

Bosch;12412 wrote: That's it CAT changed, and she runs like a dream!!
Paid a £197 for CAT, back box and all sundry bit from Sussex Classic Car. A bit more than ebay, but I am doing my bit to support a local MG supplier.


Being new here this is the first time I've read this thread.........

I thought it was the cat from the description you gave.


Home to black Alfa Romeo 159 3.2 V6 Q4 ,green MGF VVC and red MG Maestro T16.

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