Car thread - Fiesta 1.25 16v Misfire

[garth]

Hi

The woman has a 1.25 16v T reg Fiesta with ~70k miles on it.

Misfires all the time, whenever you try and give it any throttle. Changed the spark plugs today and it cured it for literally 2 or 3 miles, then it started intermittantly, and now it's back to its old tricks.

Any ideas?

Btw, anyone know how much it would be to chuck it into a dealers and get a diagnostic report?

Ta


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You ain't a has been if you never was

[Misc]

Garth, i bought a diagnostic tool for my car, it cost me £25 from ebay & the dealers quoted me £60.

Works a charm although it came up clear. This one's a few more pennies.This

[Phil_G]

Does this car have ignition leads or does it have little coilpacks that connect to the plugs and then wire into the ECU?

If its leads, then check all the contacts are clean and tight. If that doesnt cure it, then try a set of new leads. If its on coilpacks, then it could be one of them is malfunctioning and causing the misfire..
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1997 Kawasaki ER 500 A1:- Once again, Its merely crap

[Finglonga]

If it has the single Coil pack (should have being the 1.25) they break down as they get warm it makes them worse. One HT lead won't have a spark if it is. Both the Festers I have had have had the same problem. Easy and cheapish fix.
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Andy Sez....
F.Y.Y.F.F.

[garth]

[Finglonga]

Right hand side of the cam cover, you can't miss it all the HT leads run into it and a lead with a plug from the ECU.

You may need a torque bit to remove it not sure on the size though.

Shouldn't be any more than £40 from a motor factors loads more from a main stealer! Think I got my last one for £26.

https://img.photobucket.com/albums/v112/finglonga/lengine.jpg

Better pic . . .

https://img.photobucket.com/albums/v112/finglonga/zetec1.jpg

*Edit* Make sure it is that before you buy one, but it is a known fault of the Zetec 1.25.
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Andy Sez....
F.Y.Y.F.F.

[garth]

Bought a new one and intend on fitting it tonight.

Any special procedures to fitting it? Disconnect battery, or not?

Don't wanna bugger the ECU.

Ta
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You ain't a has been if you never was

[Wave2k]

Test the HT leads mate, had the same thing on me polo.
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Ducati 1299 Panigale
2009 Corvette C6 z51
RS125->CBR400->RXS100->GSXR750K2->Ducati749S->CBR600RR5->TL1000R->DRz400->RSVR1000->Honda VTR SP1->CBR400->GSXR1000K6->Honda H100->CBR600RR3->Ducati1299

[Cigaro]

[Graham88]

Disconnecting the battery won't harm the ECU. That would be a very silly design if it did.

[Finglonga]

He means disconnecting the battery before replacing the coil pack.
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Andy Sez....
F.Y.Y.F.F.

[Graham88]

Oh, you don't need to disconnect the battery to do that.

[garth]

All sorted last night just in time for her to drive up to Reading this morning.

What a difference! Bloody goes for a 1.25!
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You ain't a has been if you never was

[Finglonga]

[R6jonny]

Hmm my car has exactly the same problem, fancy coming and fixing it for me !!
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Honda NSR125 - Yamaha R6 - Ducati 748 - Suzuki GSXR750K6/GSXR1000K7/GSXR750K8 - Ducati 848 - Honda SP1 - Triumph Daytona 675
"simply because she is a female and is thus her actions largely make no sense whatsoever by default"

[Graham88]

Just replace the coilpack, common problem!

[mistergixer]