Ford Sierra/Sapphire/RS500 Cosworth This forum is for discussion of all things pertaining to the Ford Sierra Cosworth.

Advise please

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Old 19-08-2009, 10:59 AM
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Rollin Rides
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Exclamation Advise please

As many of you no i finally got my car moted yesterday Great.

There is just a couple of issues like every cossy, at about quarter throttle there seams to be a little splutter and when you are on full beans some times it pops alittle like a miss but its not!.

Anyone with any ideas other wise its a little trip bk up to Mr scott at A1, he was the last person to touch it and it was spot on,

It just been parked up since last summer and yesterday was the first time on the road, the longer i drove it the better it got but it was still there, i did replace the plugs and gap them too .7?

any advise would be helpful as i want to boost about again soon
Old 19-08-2009, 11:24 AM
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silky16v
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water in map sensor, check phase sensor also
Old 19-08-2009, 11:26 AM
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Rollin Rides
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what dampness in the map sensor? how can you check the phase sensor
Old 19-08-2009, 11:46 AM
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Ridgey
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Spark Plugs.

Although most cossies are a bit rough, mine coughs and splutter sometimes on full thottle, and when i sharply come off throttle.
Old 19-08-2009, 12:02 PM
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Rollin Rides
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do you reckon i have gapped them wrong? It used to do it on the old ones thats why i replaced them?
Old 19-08-2009, 12:13 PM
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silky16v
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Originally Posted by Ridgey
Spark Plugs.

Although most cossies are a bit rough, mine coughs and splutter sometimes on full thottle, and when i sharply come off throttle.

if setup correctly this should never happen, i've yet to come across a cossie of mine that been setup right that cough & splutters on WOT or when i come off the throttle

what dampness in the map sensor? how can you check the phase sensor
yep water or dampness in map sensor, remove the dizzt cap and check condition of phase sensor and the gap.

failing that get it setup ASAP by a proffesional
Old 19-08-2009, 12:14 PM
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LHD220Turbo
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phase sensor is in the dizzy; the wires/ terminals corrode and give all sorts of problems including misfires
Old 19-08-2009, 12:17 PM
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Rollin Rides
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yep water or dampness in map sensor, remove the dizzt cap and check condition of phase sensor and the gap.

failing that get it setup ASAP by a proffesional[/QUOTE]


It was set up then i have just left it, apart from the hick up it is the same as when A1 set it up.
Old 23-08-2009, 07:34 PM
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an1mal_69
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jus found the cause of a misfire on mine, similar to yours i.e. when under load.

It started on the way to FF, obvious id done something whilst cleaning the engine bay. When id had the cap off the sprung centre contact for the rotor arm had gone AWOL.

Only notice when i went over everything again t'other day.
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