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cossie wont run

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Old Apr 19, 2012 | 09:18 PM
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From: Devon
Default cossie wont run

thought i was getting somewhere with my car today, it fired and then ran but when you touch the throttle even slightly it cuts out. today i put on a new ignition amp, new dizzy cap and new rotor arm, new phase sensor, tried another crank sensor. new motorsport ht leads, really weird problem, the pump is priming, the fuel pump is a new 044 its done 1k miles, what else could it be???
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Old Apr 19, 2012 | 09:22 PM
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Airleak somewhere?like a loose pipe or something?just revving it on idle even a dodgy pump should provide more than enough oomph.
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Old Apr 19, 2012 | 09:28 PM
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From: Devon
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some pricks may have been buggering about with my car when its been in our garage with the bonnet up, i must admit i never thought about a loose pipe etc. will check tomorrow,
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Old Apr 19, 2012 | 09:47 PM
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have you tried the tps?
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Old Apr 20, 2012 | 05:55 AM
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i havent tried the tps. do they go wrong very often??
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Old Apr 20, 2012 | 07:45 AM
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So as soon as you start the car up then give it a few revs the misfire fault starts.
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Old Apr 20, 2012 | 08:06 AM
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So can you shed any light on when this happened, has the car been sitting, rebuilt etc???
As with any cossie or old car it WILL be electrical/sensor related, so thats an obvious one.
Not sure on your cossie knowledge or history but most common faults would be phase sensor, crank sensor for starters but looks like youve covered them, it's unlikely to be a fuelling issue or air leak.
If it was me I'd be playing with the TPS and map sensor wires to see if there's a dodgy connection oin the loom first off, you can also check the resistances of each sensor to see if they are working if you've got half a clue how to use a volt meter and so on, so maybe that's youre next best bet.
Also if you remove the distributor cap and rotor arm and protective cover thing under the that (if it's still there) you can see ther phase sensor wires, these degrade and break, this is also a common fault so i'd check that as well.
On another note I take it your leads are the right way round and your plugs are in good nick?
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Old Apr 20, 2012 | 08:09 AM
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Also forgot to add that you can plug a side light bulb into the injector connectors on the loom to check they are opening, but again since you're getting is started it's unlikely to be that, have you checked the fuel filter?
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Old Apr 20, 2012 | 08:09 AM
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Assuming theat she is idling ok then the only sensor that alters fuelling from idle to slight throttle movement enough to kill her is the map sensor, go check that is not broken / disconnected / flooded etc
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Old Apr 20, 2012 | 08:59 AM
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Map sensors are quite easily broken if they have been touched in the past iirc
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Old Apr 20, 2012 | 09:03 AM
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Have you plugged the phase sensor back in the right way round?
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Old Apr 20, 2012 | 10:35 AM
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i was gonna say map sensor

sounds like when you touch the throttle its flooding its self

id take the plugs out make sure they are clean and dry
refit and start the car
give it some throttle and if it cuts out re check the plugs and see if they are wet
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Old Apr 20, 2012 | 09:04 PM
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From: Devon
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Originally Posted by Stu @ M Developments
Assuming theat she is idling ok then the only sensor that alters fuelling from idle to slight throttle movement enough to kill her is the map sensor, go check that is not broken / disconnected / flooded etc
The car is idling very strange WHEN it runs. its idling at 1500rpm then drops then rise's again, i must admit the headgasket is on its way out but i wanted to find the problem with the car before i stripped it. MAD set it up in july sometime, then it went to ford fair and its been off the road since september. very strange problem.
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