Guest vinny2984 Posted January 26, 2004 Report Posted January 26, 2004 can anyone help. Got a 2.8v6 auto 1997. It missfires, but its not the plugs or ht leads. Its irregular.Also, I'm convinced there is a linked problem with the electricsie. lights dim on tickover, but just replaced the alternator. In drive when stationary there is a lot of missing and vibration from gearbox, dont know if this could be linked too.niether ford not vw could pinpoint it with diagnostics.I could do with some suggestionscheers vinny Quote
Guest SA Intruder Posted January 26, 2004 Report Posted January 26, 2004 When did it start, and did it follow any event, addition or replacement? Was it after a service, oil change? Quote
Guest vinny2984 Posted January 27, 2004 Report Posted January 27, 2004 I bought the car last July, and noticed it had a slight missfire then, but it didnt worry me, i put new plugs and leads on thinking that would cure it, but it didnt.Its got worse since then. I dont know if the light were dimming in July, its not easy to detect unless our looking for it, quite slight.the miss is quite noticable on tickover, but when driving it isn't.Main problem is, it has an LPG conversion, and the miss is apmlified greatly on gasto the point where its very hard to pull away and stalls alot. Quote
Guest SA Intruder Posted January 27, 2004 Report Posted January 27, 2004 Also check for air leaks around the intake system. Had any backfires? Quote
Guest vinny2984 Posted January 28, 2004 Report Posted January 28, 2004 it suffers backfires on gas but not on petrol, very bad below 2000rpm after that it runs great Quote
Guest Derek F Posted January 28, 2004 Report Posted January 28, 2004 Hi vinny,i had a similar problem with mine, ran ok on gas but terrible on petrol,noticed Dave G's comment ref rear brake lights, is your offside rear brake light working ok? if not, rectify. My bulb had blown, changed bulb then engine ran ok after that. Your gas system is it injected or is it attached to the air intake pipe ( in which case you will suffer from back fires regular ) Good luckDerek F Quote
Guest Paul Collins Posted January 28, 2004 Report Posted January 28, 2004 Hi vinny,i had a similar problem with mine, ran ok on gas but terrible on petrol,noticed Dave G's comment ref rear brake lights, is your offside rear brake light working ok? if not, rectify. My bulb had blown, changed bulb then engine ran ok after that. Your gas system is it injected or is it attached to the air intake pipe ( in which case you will suffer from back fires regular ) Good luckDerek F The bad running on petrol sounds like dirty injectors, due to running a hot engine without anything running through the injectors. Try some injector cleaner, then run on petrol for a few miles. Only had one backfire on gas, when I was getting used to it and the auto LPG switch went over on a full throttle gear shift! sounded like a bomb, but my airbox has a pop off valve to save the system. Now I just blip the throttle once after I start up to switch over. If you've got a Sh*t hot ignition setup, with good resistor leads, you shouldn't get a misfire. Paul Quote
seatkid Posted January 28, 2004 Report Posted January 28, 2004 Running on gas and backfiring somehow conjures up visions of Jonesy's van on Dad's army with the big gas bag tied the on top! :rolleyes: Quote
Guest vinny2984 Posted January 28, 2004 Report Posted January 28, 2004 seatkid, your closer to the truth than you think tried injector cleaner, no joylpg is sequential injection systemonly backfires on lpg, not petrolmisses on both but far worse on gas i think its an electrical fault, i mentioned dimming of dash lights andalso radio cuts out when indicating sometimes, cant help thinking everythingis related, but dont know where to start with electrics at moment its sucking air bad, seeing as it backfired a pipe clean off never to be seen again Quote
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