Mk 6 Fiesta 1.6 TDCI - Limp Mode?

Mk 6 Fiesta 1.6 TDCI - Limp Mode?

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Discussion

dhutch

Original Poster:

15,280 posts

204 months

Thursday 30th November 2023
quotequote all
We have a 58plate 90hp 1.6 diesel fiesta which has recent started occasionally suffering from reduced power.

- Struggles to accelerate at all above 60-70mph
- Will not rev above 3.5k rpm while being driven, or 4k under no load.

Typically key cycling it will clear the issue.

No warning lights at all, have not got a OBD reader.

Boost control actuator, control solenoid, sooted vanes, turbo underboost, split hoses, DPF wiring issues, etc have all be mentioned in past threads on here and FO Club forums.

Anything to look for other than getting a OBD reader on it?

LeftLake

75 posts

156 months

Tuesday 26th December 2023
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It's tricky to diagnose from this description but (as far as I am aware) yours doesn't have a DPF as these were introduced in 2010 on the 95PS models. It's tricky to diagnose from this description and could be any of those things putting it in limp mode. It could also be something along the lines of injectors / fuel pump / fuel filter.

You might be lucky with an OBD reader and finding the faults, but really you want a decent one with live sensor readouts (something like forScan might be a cheap way of doing this).

dhutch

Original Poster:

15,280 posts

204 months

Thursday 16th May
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As an update, diagnosis was very low boost and a failed turbo.

£900 later, it's still doing it, apparently the boost is a bit low, might just be able to adjust waste gate but speaking with parts outlet before hand to ensure no issues.

Gas1883

566 posts

55 months

Wednesday 22nd May
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Daughter had 2 x fiesta zetecs diesel , neither ran right which is why changes to mk7 st

dhutch

Original Poster:

15,280 posts

204 months

Saturday 25th May
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Booked in for a replacement turbo on Wednesday warranty replacement from the parts supplier.

dhutch

Original Poster:

15,280 posts

204 months

Thursday 29th August
quotequote all
As an update, the second new turbo was just as bad!

Back to the shop, boost control solenoid, so another £140 later and we were back on the road.

Car then set for a few weeks while I drove the E46, but as thats now have a few days in the garage I back in the Fiesta and can report its running fine again.

Just need to sort the dash vent motors now!

dhutch

Original Poster:

15,280 posts

204 months

Friday 27th September
quotequote all
All good after dailying the car for the past three weeks.

Well, other than no heaters!