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| robertf123 |
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hey guys, after changing my spark plugs today i noticed that a couple or them were worn to the sh** house, while others didnt look very worn out at all.
Any one have any ideas why this could be. On a some what irrelevent note, the engine does seem to be missing quite a bit especially in the lower rev range and i cant figure out why.
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| Krytox |
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pre crossflows can leanout due to induction channeling,
in otherwords, state details of alleged car!
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| robertf123 |
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4.0L EL falcon on LPG and petrol, it misses a fairbit on LPG but is pretty much undrivable on pretrol (injectors possibly??)
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| robertf123 |
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ideas anyone?
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| fiftyone |
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oxy sensor damaged or the thing is running way lean
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| robertf123 |
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well in that case, i have an oxy sensor off an EB, any chance that itll fit in place?
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| fiftyone |
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hmm. should
i'd be checking the injectors and fuel system (incl. fpr) to make sure your getting the right amount of fuel going through. then try to figure out whats caused the overall damage. (could be just old plugs...)
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| MMD |
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LPG is hard on Spark Leads, when were they last replaced ?
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| robertf123 |
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i think leads would be close to 2 years old now, the odd thing is that it runs ok on LPG, i think id be leaning towards injectors, is there any way of testing them?
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| fiftyone |
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na, but i'll just about say that you need a set of recos or a freshen up of the ones you got. check the pressure pipe for a propper seal too from the fuel reg. seen a few with holes worn in the back
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| robertf123 |
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I was thinking about putting in a set of AU injectors but im not too sure what there worth, also ive never replaced jectors before so not sure if its a big job.
also where would i find this pressure pipe?
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| neddy |
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Check your timing.
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| FORDom |
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get iridiums
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| fiftyone |
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back of the fuel rail on the fuel presure reg, theres a small back pipe
take it off and suck on it, if its not holding pressure, replace it
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| robertf123 |
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hmmm.. not sure about the iridiums, i was told there a waste of money as they burnout just as quickly on LPG (I put normal NGK's in the other day), thanks anyway though.
Ill check the pressure hose tomorrow but I'm finding it increasingly difficult to narrow it down to one or 2 things. So far it looks as if ive got a long list of things that may need replacing. If i got my mechanic to run a diagnostic test on the ECU would it help me narrow the problem down a bit? cheers boys, appreciate the input
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