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jacksargent93

Feels Like Loss Of Power...

6 posts in this topic

Whilst accelerating it feels as if I loose power for a few seconds - everyone just thinks I'm being paranoid.

But it feels even though I'm accelerating for a few seconds I dont progress in speed and can feel it 'cut out'.

I have noticed it to happen just before 3000rpm in every gear apart from 1st.

If anyone has experienced this or know what this could be any one I would appreciate :)

Thanks a lot

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Mines the same, 2010 1.6 tdci. I'm paranoid that its a turbo problem so am going to get it checked, it's like the guts of the car disappear, maybe the turbo runs for a very short period...... Hopefully I'm wrong, I was spoiled before with a Leon Cupra tdi 150 and that was exceptionally quick compared to the focus (compared to a lot of cars actually) I was actually disappointed when I took my focus out for its first proper drive :(

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One of you has an NA (naturally asperated/ non turbo) petrol engine and the other a turbocharged diesel engine - they are different but can both suffer from flat spots/ hesitation etc they are set up for emmisions/ economy and not performance

4-cld NA Petrol - can suffer from a midrange flat spot, its to do with the valve overlap and the exhaust,the fuelling (set for emmisions/ ecomomy) does not help either. You don't notice it in 1st because its a lighter load (you "rev-through it" quickly but the flat spot is still there) but a good service helps (could also potentially be plugs/ ht leaads or coil paks) its typical of this sort of car - some drivers might not notice it but they all have a flatspot in the midrange

Turbo- diesel - can be sluggish before it reaches the boost threshold, turbo-lag, flat spots and hesitation due to the EGR valve (at certain (low) revs/ loads)(have you fitted a solid blanking plate yet?) torque and power can drop off at higher revs / narrow power band (especially noticable in the lower gears) / some fords have overboost (boost runs for short period then drops off) small intercoolers suffer from heatsoak -

Petrol and diesel - noticable power loss in higher atmospheric temps - + increased lag in the turbo-diesel and flat spot/ hesitation worse on the petrol NA (higher intake air temps can show up the "glitches" worse)

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One of you has an NA (naturally asperated/ non turbo) petrol engine and the other a turbocharged diesel engine - they are different but can both suffer from flat spots/ hesitation etc they are set up for emmisions/ economy and not performance

4-cld NA Petrol - can suffer from a midrange flat spot, its to do with the valve overlap and the exhaust,the fuelling (set for emmisions/ ecomomy) does not help either. You don't notice it in 1st because its a lighter load (you "rev-through it" quickly but the flat spot is still there) but a good service helps (could also potentially be plugs/ ht leaads or coil paks) its typical of this sort of car - some drivers might not notice it but they all have a flatspot in the midrange

Turbo- diesel - can be sluggish before it reaches the boost threshold, turbo-lag, flat spots and hesitation due to the EGR valve (at certain (low) revs/ loads)(have you fitted a solid blanking plate yet?) torque and power can drop off at higher revs / narrow power band (especially noticable in the lower gears) / some fords have overboost (boost runs for short period then drops off) small intercoolers suffer from heatsoak -

Petrol and diesel - noticable power loss in higher atmospheric temps - + increased lag in the turbo-diesel and flat spot/ hesitation worse on the petrol NA (higher intake air temps can show up the "glitches" worse)

My car was serviced before I received it so I don't know what to do — get it serviced again? As you said these cars suffer from it. So I suppose its a normal thing to happen?

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This is the Superchips Bluefin power and torque curves (for the Focus mk1 1.6 98Hp, but the same idea )-

http://www.mybluefin.co.uk/curves/focus16.pdf

If you look at the blue line on the torque curve, it drops just after 3k, it does not start to rise again untill 3-1/2K, and above before it (the torque) rises to the level it was before 3k, this would be called a "midrange flat-spot" but some drivers may describe this as "hesitation"/ a "glitch" etc - ideally the graph (torque) should rise smoothly or stay level with no "dips" in it untill the redline

What was done at the service? - you would expect the oil and filter to be changed, the air filter and the spark plugs, genuine Ford spark plugs are good, but irridium NKGs are better, i would personally gap them down to 0.8mm (rather than 1.0mm) using the correct tool (and feeler gauges) - this protects the HT (high tension) leads and coil packs, + the plugs are also less liable to miss-fire, even if they get fouled

Also - any modifications can have an adverse effect if they are not done right

You don't know how much i hate saying this but premium high octane fuel may help too - try it and see if it helps (and keep the fuel high - if the "low fuel" light comes on the ECU can go into "eco" mode + a high fuel level helps to keep the fuel pressure/ supply up)

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Its just strange, I have had the car 2 months and I only notice it now? But I will try the high octane a go and see if I can narrow this down a bit.

Thanks a lot mate!

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