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Jun 19, 2011 14:32:26 GMT
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Over the last 2 month my daily driver MK3 astra 1.4 has developed a rather annoying intermittent fault.
It just cuts out,no spitting or farting,then you leave it for 5/10mins then off you go.
I have changed the following
fuel pump
fuel filter
fuel pump relay
dizzy cap
rotor arm
coil
amp module
ICV (due to fault code reader)
used it all week no problem,Took it over to collect some cement etc today and it has just played up some thing chronic just put fault code reader on it and not recording any faults,now scratching head.
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Don't become a thief,The government don't like competition.
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Jun 19, 2011 14:47:24 GMT
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Is it theEcotec engine?
They've a habit of eating sensors. Look at the crank and cam sensors. They aren't expensive.
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Jun 19, 2011 15:11:00 GMT
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try the lambda sensor ;D
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Jun 19, 2011 15:18:59 GMT
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its the 8v engine
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Don't become a thief,The government don't like competition.
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60six
Posted a lot
(╯°□°）╯︵ ┻━┻
Posts: 1,657
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Jun 19, 2011 19:47:30 GMT
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Have you changed the plug leads? My car never used to drive at all well in very light rain .... fixed it by changing the leads.
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Some 9000's, a 900, an RX8 & a beetle
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Jun 19, 2011 20:34:26 GMT
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when its running its a smooth ride,revs freely,no kangaroo jump,lambada regulates lean and rich mixture,it just seems as if the fuel has stopped,but i can hear pump priming. HT leads were done not 6 months ago on last service. |
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Don't become a thief,The government don't like competition.
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Jun 19, 2011 21:52:17 GMT
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Have you got an in-line fuel filter and have you removed the new (fuel) filter you fitted to see what it's like?
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Corsa Apology Champion 2014.
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Jun 19, 2011 22:10:25 GMT
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when its running its a smooth ride,revs freely,no kangaroo jump,lambada regulates lean and rich mixture,it just seems as if the fuel has stopped,but I can hear pump priming. HT leads were done not 6 months ago on last service. I know, it sounds exactly the same as what happed to my mates 1.6 8v astra. changed everything we could think of. changed the lambda sensor and it ran great |
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Jun 19, 2011 23:13:09 GMT
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Try the rotor. Mine had a small burn-mark inside, where the spark had jumped over to the camaxle
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fuel filter is the solid type steel canister,so unable to see if there is crud inside.
rotor arm is good,i would expect it to be after only 200+ miles.
i have ordered a new lambada,what is the best to use on it fitting wise (lubricant).
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Don't become a thief,The government don't like competition.
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Jun 20, 2011 21:58:44 GMT
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This sounds like a crankshaft position sensor fault.
When it/engine get hot it gets an excessively high resistance and stops creating its 2volt A/C (approx) signal so the ECU thinks the engine isnt turning so ignition and injector switching stops.
When the sensor/engine cools the sensor resistance drops and off you go again.
If its an 8 valve the sensor should be on engine block pointing at the toothed crank pulley.
It wouldnt hurt to clean the sensor and pulley as a build up of crud wont help either.
A good way to check if this is the problem is when it cuts out next spray the sensor with something cold like brake cleaner to see if it restarts...
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many thanks for that bowling4soup,will check that out today.
Had car up in the air and the C14NZ engine has no crank sensor,so i think we can discount that theory.
Also have changed temp sensor,Map sensor,new diaphragm in fuel regulator,throttle position sensor,starting to run out of ideas.
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Don't become a thief,The government don't like competition.
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Jun 21, 2011 10:12:36 GMT
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It does have a sensor though - it's in the distributor, and subject to the same problems as the external ones.
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To get a standard A40 this low, you'd have to dig a hole to put it in |
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Jun 21, 2011 10:52:43 GMT
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It does have a sensor though - it's in the distributor, and subject to the same problems as the external ones. so it could be down to the dizzy then,just looked in the haynes and it is not shown internally in the exploded view |
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Don't become a thief,The government don't like competition.
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Jun 21, 2011 17:45:11 GMT
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OK if its an early mk3 and got a distibutor,then the sensor is inside (listed as a hall effect sensor).
As said these also go open circuit with engine heat.
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Jun 21, 2011 19:07:06 GMT
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thanks,i will try and locate another dizzy then,lambada has been changed but not tried it on a run yet,its been ticking over for the last hour with no problems.
I have found a company in Basildon that will test the dizzy for free (quite a rarity these days),so if that checks out ok,then that's another possibility crossed off.so nice little run out tomorrow.
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Don't become a thief,The government don't like competition.
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Jun 23, 2011 13:36:32 GMT
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Have just returned from a quick run down to Canterbury and back (100mls) after fitting refurbed dizzy,and it hasn't faltered at all,But then again it used to be ok for a week or two,Then play up.Many thanks to bowling4soup and Scaryoldcortina for there input as the dizzy had gone OCV,So hopefully this issue is cured,Also many thanks for every ones input.
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Don't become a thief,The government don't like competition.
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Jun 24, 2011 18:25:18 GMT
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we had a 1.4 8v that cut out randomly, fault traced to the ignition switch wiring! replaced that, and it was fine! was an odd one to diagnose tho, guess something to do with steering column movement...
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 2006 Audi A3 2003 Fusion 2 looking for a project.... |
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Already done that one,new ignition switch,barrel (due to snapping the key) there isn't much i haven't changed on the car trying to solve this fault, Wouldn't normally bother,But it is a one owner from new with full service history and only 52k on the clock,Few little rust spots just starting to appear,Nothing major that can't be sorted.
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Don't become a thief,The government don't like competition.
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Jun 26, 2011 12:55:21 GMT
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Mine used to drive me mad. It would just cut out at traffic lights. Changed the cam sensor for a new one as the old paperclip trick told me to. Turned out it was the crank sensor on mine, as it was only finger tight. I'd bought another one anyway. RIP my Yellow Astra Sport  |
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