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Nathan B
Nathan B, Nvq3 motor mechanic
Category: Vauxhall
Satisfied Customers: 3
Experience:  Over 20 years experience including running my own garage working on a wide range of vehicles.
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miss fire on a astra 1.8 03 lpg manufacture fitted. fault

Customer Question

miss fire on a astra 1.8 03 lpg manufacture fitted. fault first occurred when running on lpg. we had fault codes read they were 1. throttle position sensor circuit 0220 2. electrical throttle control reduced power 1550, We changed the tps sensor as complete unit throttle body, also cleaned it up throttle body , didn't help the miss fire. next we changed the crank sensor, no effect. then we changed the spark plugs. and ignition coil pack. ( not a gm part ) . no change, we then got a plug and go ecu that didn't require coding via vauxhall which we fitted, still nothing helped left with misfire on 2 cylinders. Then car ran out of gas totally empty and the fault stopped completely car ran perfectly fine on petrol only. so after all that I just accepted it and ran it on petrol only 5 months. then last week it started to misfire again while running on petrol again no gas in tank, I thought it would be the ignition pack as I didn't use original gm part the first time. so I ordered a better ignition coil http://www.eurocarparts.com/ecp/c/Vauxhall_Astra_1.8_2003/p/car-parts/car- electrics-and-car-lighting/ignition/ignition-coils/?413720060&1&ea10f7d200260ff678d2a1ae26c2ccaadad3cbf9&000197 . but that had no effect on the misfire once fitted. Totally stumped as to what it could be, should I have had the codes read prior to the new ignition coil would that help, I doubt it grasping at straws perhaps, hopefully I can reach more experts here than in myt local vauxhall garages as they look at me with a blank expersion and say well its LPG!.. Thanks Craig

I have just checked something and it turns out that theres gas in the tank again, my partner must have put it in, so its possible that once this has ran out it will cure the misfire,  which requires fixing anyway so I can use the lpg system

Submitted: 2 years ago.
Category: Vauxhall