Shudder on accelaration comes and goes

Tiny
JOHNG35
  • MEMBER
  • 2007 FIAT PUNTO
  • 1.4L
  • V8
  • 2WD
  • MANUAL
  • 123,000 MILES
Hi, there I've just recently bought the car listed above active sport 8v. I was told that it had been stood for two months because the MOT had ran out. On bringing it home at first everything was a bit stiff, ie: suspension gear box but loosened up on the drive after about an hour, there was no shuddering on acceleration at all throughout the whole journey. When I've got it home the three days later I managed to get it booked in for a MOT it failed on two rear shockers and one wheel bearing, so I got them fix then it was passed. Three days later for no reason its starts stuttering on acceleration at different speeds, When I say stuttering I mean as If it's loosing power and then getting it back sometimes the engine management light comes on, on the dash then goes and it's fine again then it can go for hours then starts again. I've put some redx in with fuel and it is still doing it but not as bad. Has anyone got any ideas what the problem could be?
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Friday, March 15th, 2019 AT 4:38 PM

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Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,005 POSTS
Welcome to 2CarPros.

Have you checked fuel pump pressure? Also, is the engine light flashing? If the light is flashing, I suspect a misfire. If it isn't, I suspect a fuel pressure issue.

Here are links that will help you check fuel pump pressure. Do this and let me know the results.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Let me know what you find. Also, check basic things such as a plugged air filter, if any engine vacuum hoses are disconnected or damaged.

Let me know if I can help.

Joe
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Saturday, March 16th, 2019 AT 4:44 PM

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