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Can't stop the car misfiring above 4k revs

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Old 04-12-2005, 02:26 PM
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James Raby
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Default Can't stop the car misfiring above 4k revs

It's only since a new fuel pump and fuel tank were fitted a few weeks ago, was A1 ok before

Checked the plugs after it being suggested on Tuesday night at Norfolk Meet, the little screw on tips WERE loose and are now tightened back up

The distributor cap and arm look fine too, the boost was turned down incase of being too high hence blowing spark out

HT leads are nice and tight, coil is ok

Took it out after checking over, no difference at all

Any ideas people cos it's really bugging me now
Old 04-12-2005, 02:31 PM
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Dave_mk2
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Check valve clearance
Old 04-12-2005, 02:34 PM
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AndyRST
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Correct fuel pump ? Broken wire to fuel pump? Fuel ECU fuse blown?

Why did you replace tank and pump? and where did you get your "new" ones from ?
Old 04-12-2005, 02:35 PM
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James Raby
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Fook that, I'll leave things like that to Gary when I have a fe more bits then a setup

Just want to get it as good as I can before it goes there

If I take it up the rev range clowly - same goes for boost - it's fine
Old 04-12-2005, 02:36 PM
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James Raby
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Fuel pump from Phil, tank from a reputable guy who used to use this forum

Might have a look at the wiring to pump actually, coud be on to a winner there...

Fuel tank was MOT failure as had a pinprick hole in the top of it, the fuel pump failed just after tank was fitted, it siezed
Old 04-12-2005, 02:43 PM
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AndyRST
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Could be as it trying to supply more fuel the pump is working harder and the wiring cant supply enough power to the pump causing a missfire?

Just scrap the ol' wanna be bean tin and save the money
Old 04-12-2005, 02:47 PM
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James Raby
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Andy

I will be getting rid of the car once a few more things are done and in a mag, that's all I want from it then build another one ROFL

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Old 04-12-2005, 02:59 PM
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AndyRST
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Originally Posted by James Raby
Andy

I will be getting rid of the car once a few more things are done and in a mag, that's all I want from it then build another one ROFL
How old are you James?
Old 04-12-2005, 03:03 PM
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I am 25, MY GOD I just looked in a mirror and just thought to myself 'I'm 25, what am I doing driving an Escort RS Turbo'
Old 04-12-2005, 03:04 PM
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Adrian
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I think he is about 40
Old 04-12-2005, 03:07 PM
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Originally Posted by James Raby
I am 25, MY GOD I just looked in a mirror and just thought to myself 'I'm 25, what am I doing driving an Escort RS Turbo'


you aint DaveEscCos are you?
Old 04-12-2005, 03:08 PM
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James Raby
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Nope, but might as well quote him
Old 04-12-2005, 03:41 PM
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Have you tried the throttle switch?? Mind did the same thing and i changed the pump & the wiring!

Just undo the two screws on the side of the throttle housing and give it a twist until it clicks! Had a friend who had the same problem and his was the throttle switch too.

Worth a try at the very least.
Old 04-12-2005, 03:55 PM
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Have done, it now clicks when it didn't before
Old 04-12-2005, 05:56 PM
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Originally Posted by James Raby
I am 25
Too old to start building a massive spec RST then
Old 04-12-2005, 06:03 PM
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Only problem is Andy, I just about have everything to make 3 running RST's now lol
Old 04-12-2005, 06:16 PM
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Originally Posted by James Raby
Only problem is Andy, I just about have everything to make 3 running RST's now lol
Why ? You have problems getting 1 to run properly, let alone 3
Old 05-12-2005, 09:56 AM
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My cossie has been doing this for a while now, misfires over 4k rpm, but only when under load, if it's in neutral it'll rev to the limiter fine. Any other ideas?
Old 05-12-2005, 10:02 AM
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Mine did that m8 it was the crank sensor gave it a clean and was fine after that .
Old 05-12-2005, 10:05 AM
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coil?

put a Grp A coil on it as thats what cured my misfire.
Old 05-12-2005, 10:10 AM
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Originally Posted by KSA-Cossie
Mine did that m8 it was the crank sensor gave it a clean and was fine after that .
Where's the crank sensor?
Old 05-12-2005, 10:14 AM
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Down the bottom of the engine adjacent to the crank pulley m8.
Old 05-12-2005, 10:22 AM
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Originally Posted by KSA-Cossie
Down the bottom of the engine adjacent to the crank pulley m8.
What's it look like? Is it easy to get to?
Old 05-12-2005, 10:32 AM
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As you look at the car it's on the r/h side of the crank pulley,jack up the car and give it a clean,i used a clean cloth.
Old 05-12-2005, 10:41 AM
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Thanks, will go have a look at lunchtime
Old 05-12-2005, 02:16 PM
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Is it the thing held on with 2 bolts?? Looks like it's got one or maybe 2 heavy wires going into it?
Old 05-12-2005, 02:21 PM
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I cant actually remember m8,here's the sensor though.

Old 05-12-2005, 03:04 PM
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Ok nice one, that's the bit I saw
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