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Matt, Engineer
Category: Australia Car
Satisfied Customers: 21867
Experience:  Automotive Engineer for 20 years, BEng hons degree,
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Gu 4.5 petrol and gas starting up rough and bouncing all

Customer Question

gu 4.5 petrol and gas starting up rough and bouncing all over the place switch over to petrol and it runs better but still some missing
Submitted: 1 year ago.
Category: Australia Car
Expert:  Matt replied 1 year ago.


I'd suggest checking the gas supply pressure as the 1st step and as its running roughly on both gas and petrol then checking all the plugs for damage and plug wires for high resistance would also be worthwhile

and if this is OK then measure the compression pressures across all cylinders

Expert:  Matt replied 1 year ago.


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