My Vauxhall Astra has just started to 'chug', and even conks out at junctions because the revs drop so low.?
Answers:
what year is the astra? if its the older 92-98 type has the timing belt been done recently? if so the bottom pulley may not have been fitted back correctly and come loose again causing the bottom crank sprocket to vibrate and the keyway on the crank to break and then the valve timing to go out - it could also be drawing in air from around the inlet manifold or if its a bigger engined car it may be the air flow meter is faulty
its because astras are designed to be stolen and driven at high revs around housing estates at night. e.g. not stopping at junctions. seriously get rid of the car.
It either has a fuel pump problem, not getting enough fuel to the engine, has an injector problem, or if it has an immobiliser problem. GM Motors fitted standard immobilisers so unreliable they should be illegeal, won't stop anybody but you using your own car. Not that I hate the wretched things at all!
Truthfully its probably an injector fault, especially if you can clear it by flooring it. But a GM immobiliser is more likely than the fuel pump to be faulty if this is not the fault.
change the spark plugs - this will cost very little - if your car is old & due for a service then this is what it most likely is- try it & see if there is improvement before anything else
check out the fan, just inside the bonnet towards the front
I agree with alex p prob injector. vauxhall lol so horridily cheap you shoulda got a ford
sounds like your alternator, park your car facing a wall (at night) and give it a rev if the light gets brighter the alternator is doing its job, if not you need to change the bushes or get a new one
Sounds like a clogged up air filter or possibly the timing needs adjusting. If none of these cure it let me know.
GM cars forever
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